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Alan Minyard
December 14th 03, 10:24 PM
On 14 Dec 2003 12:48:02 -0800, (Tony Williams) wrote:

>Chad Irby > wrote in message >...
>> In article >,
>> (Tony Williams) wrote:
>> >
>> > So to sum up, the F-35 will be getting the second-best gun because
>> > Mauser's US partners couldn't keep their costs down.
>>
>> No, the F-35 will be getting a gun that's at least as good, because the
>> "cheap" gun wasn't nearly as cheap as we'd been led to believe.
>
>This from the Boeing press release in 1999:
>
>'Citing lower costs, greater lethality and improved supportability,
>The Boeing Company has selected the Advanced 27mm Aircraft Cannon for
>its next generation JSF combat aircraft.....The gun is also a
>candidate for the Lockheed Martin version of the JSF...."It's the
>lightest, most accurate and reliable gun based on our initial studies"
>said Dennis Muilenburg, JSF weapon system director for Boeing. "Our
>comparative assessment found the 27mm cannon to be more affordable,
>more lethal and more supportable than any of its competitors".'
>
>Note that cost is only one of the factors mentioned. Words like 'more
>lethal', 'lightest', 'most accurate and reliable' are in there too.
>That provides no evidence for claiming that the GAU-12/U is 'at least
>as good'.
>
>Tony Williams
>Military gun and ammunition website: http://www.quarry.nildram.co.uk
>Discussion forum at: http://forums.delphiforums.com/autogun/messages/

The only thing being evaluated at that time were Mauser's press releases.
When they started comparing real numbers the Mauser was toast.

Al Minyard

Brett
December 14th 03, 10:52 PM
"Tony Williams" > wrote:
| "Brett" > wrote in message
>...
| > "Tony Williams" > wrote:
| > |
| > | 1. The German Mauser BK 27 was selected by both Boeing and
| > | Lockheed-Martin over the GAU-12/U as the best and most
cost-effective
| > | gun for the JSF (documented fact).
| >
| > That isn't a documented fact. The documented fact is that the
GAU-12/U
| > has just been selected as the best and most cost-effective gun for
the
| > JSF in open competition with the BK 27 (the original selection of
the BK
| > 27 in 2000 was not an open competition) by LMT.
|
| It's as well documented as the decision to use the GAU-12/U: the
| source for both being official press statements, placed on the web.
| You seem to be very selective in the press statements you're prepared
| to credit.

I'm not selective, you however appear to have misread more than one in
recent days.

| What makes you say that the original decision in favour of the BK 27
| wasn't 'in open competition'?

How about only one system bid on being included on the other candidate
aircraft. It isn't "the best and most cost-effective" if it is the only
one presented to the customer.

| It was clear that when Boeing decided in
| favour of the BK 27 in 1999, the GAU-12/U WAS in the frame, because GD
| withdrew it from the JSF competition in 2000, just before L-M selected
| the BK 27 as well (which looks very much like a case of 'resign before
| you're sacked').

Or it could be that GD believed the "press" on how effective the BK 27
was. The evaluation by LMT after the JSF contract award would appear to
have determined that the BK 27 wasn't that great an advance and that the
GAU-12/U was just as effective.

Paul F Austin
December 14th 03, 11:30 PM
"Chad Irby" wrote
> "Paul F Austin" wrote:
>
> > "Chad Irby" wrote
>
> > > Which means, on cost terms, shooting down a big drone with a gun is
> > > *very* cost-effective (a million-dollar airframe for a couple of
hundred
> > > bucks worth of ammo).
> >
> > Which makes using UAVs as justification for a gun, daft.
>
> Not "as justification," just "one more type of target."
>
> > By that argument, let's ditch all the expensive AAMs. UAVs are no
> > more a justification for designing in a gun than is a handwave of
> > "you never know..." which is a good description of the gun
> > justifications seen here.
>
> So far, we have several different reasons for having guns in planes,
> versus "we only need missiles to shoot down other planes."
>
> The argument for not having guns is, overall, pretty thin.

No. To recapitulate: the first offering was "well, what are you going to do
when the troops call for very, very CAS like they did in Operation
Anaconda?". When Paul Adams fairly clearly demonstrated that gunnery CAS was
remarkably ineffective in the event, needing to be followed up with bombs to
actually do the job (remember bombs? They're an alternative to that gun you
like).

Next up was "Well, how about shooting UAVs? There are bound to be so many
that fighters will run out of missiles or alternatively (it wasn't clear)
UAVs are so cheap and numerous as to not be worth a missile."

I pointed out the on the contrary, the UAVs large enough to be engaged by
fighters, like G-Hawk and Predator are in fact high value platforms, more
than worthy of a missile and you responded with (approximately) "You can too
shoot down a Predator or G-Hawk with a gun", missing the point.

You (and others) still miss the point that I made and that Paul Adams made
that in order to justify putting a gun on a new fighter (no fair, strawmen
about stripping the guns off the current fleet), you have to justify the gun
in terms of mission payoff_against other alternative uses of the budgets of
time, money, weight, volume and power_. Because in real life, that's what
you have to do.

There_is_an argument for building a successor to the 'Hog but it has to
compete with orbiting Heavies stuffed full of JDAMs and developments of
JDAM.

Paul F Austin
December 14th 03, 11:35 PM
"Tony Williams" wrote in message
>
> What makes you say that the original decision in favour of the BK 27
> wasn't 'in open competition'? It was clear that when Boeing decided in
> favour of the BK 27 in 1999, the GAU-12/U WAS in the frame, because GD
> withdrew it from the JSF competition in 2000, just before L-M selected
> the BK 27 as well (which looks very much like a case of 'resign before
> you're sacked').

Tony, that almost never happens in US contracting. If you_do_withdraw an
already submitted proposal it will cost you a lot of goodwill with the
customer. Actually, companies commit to submitting a proposal when the RFP
comes out and reneging of that commitment is not done lightly. I don't know
why the GAU-12/U proposal was withdrawn but it was_not_to prevent the
embarassment of losing.

Paul J. Adam
December 14th 03, 11:42 PM
In message >, Kevin Brooks
> writes
>"Paul J. Adam" > wrote in message
...
>> Trained gun-fitters and repair teams, and the logistic pipeline to
>> support them, cost money.
>
>But you are claiming we would retain the gun pods--don't they already then
>have to maintain these skills?

Sure, but you can scale back sharply when you're maintaining a MTE fit
rather than a fleet-wide fit. Training is more of an issue and a more
significant risk.

>> Try costing up the aircraft,
>
>They have to bore holes in the sky anyway--having them chunk up hours on the
>range instead of doing touch-and-go's seems to be of little impact.

How many fast-jet sorties are flown for purposes of 'wheels up, flew
around, wheels down'?

If you want strafing practice to be useful, the pilots need to know
whether they did well or badly (and if they did badly, what to improve).

None of this is simple, easy or cheap in a modern world.

>Keep in
>mind that the strafe mission is not their highest priority training event.

Why not, if it's operationally vital?

>> the range,

>The range would undoubtedly be a multi-use facility (i.e., unlikely to have
>a range dedicated to strafe only), so that is no argument.

If it's multi-use then time spent strafing is time it's not usable for
other missions. That's a serious cost, especially when you're not
exactly awash in live-fire range facilities to start with.

That's before you even _start_ on the effort needed to keep the range
clear, score the passes, clean up afterwards...

>the targets (whether air-to-air
>> or air-to-ground),
>
>Yeah, putting up a target panel of fabric must be extremely expensive...

How many times have US units been attacked by large stationary panels of
motionless fabric? Real targets move, use camouflage and obscurants, and
are (if guns are required) close to similar-looking friendly units.

>the equipment to provide useful feedback and training
>> (because 'pulled trigger, gun made loud noise, came home, landed' is not
>> useful training) and it adds up with alarming rapidity.

>Gee, they have to grade all kinds of exercises already--I'd suspect a bit of
>gun camera footage of the strafe pass would be acceptable.

I bow to your obviously superior experience of gunnery ranges: since
I've only worked the damn things I can't compete with your assertions
and enthusiasm.

>> I'd heard the A-10s got pulled early due to hot/high problems, and given
>> the frequent sniping at the F-16's range I'm surprised to hear it doing
>> significant long-range loiter.
>
>The 354th FW *did* do "significant long-range loiter" during that operation
>with their F-16's, so that argument is meaningless.

I'd be interested in some numbers, given the very significant problems
experienced with keeping F-16s stacked in kill boxes during Gulf War 1
(fifteen minutes or less was common, with 'dump targets' getting heavily
hit when aircraft arrived, waited, and left without hot targets)

>> According to
>>
>> http://www.csis.org/burke/hd/reports/afghanlessons_airwar_exec.pdf
>>
>> the US flew 17,500 combat sorties over Afghanistan, of which you've
>> heard of several failed strafes ('danger close' sorties where the gun
>> passes failed to stop the enemy, leading to 'even more dangerously
>> close' use of other munitions) and two cases where the enemy was
>> 'suppressed'. Guesstimate two aircraft in each case for eight sorties
>> with a 50% success rate.
>
>Failed to stop the enemy? How much suppression did they achieve?

The description by a participant of the enemy in a static defensive
position continuing to fire despite repeated strafes, until they were
taken out by a LGB, indicates a lack of effectiveness.

>And here
>you go with your McNamaresque number crunching again...

Hey, Kevin, _you're_ the one suggesting that "rounds fired = results".
Perhaps we should count the 20mm rounds fired during those strafes and
calculate the body count?

The strafing passes were intended to deter, defeat or destroy the enemy
in that position. They clearly failed to do so.

>war cannot always be
>resolved into neat little statistical piles. Witness the recognition lately
>of the fact that the old attrition models for simulations are just plain
>inaccurate as all get out.

'Lately'?
>> It's not an enormously convincing argument that the existing gun
>> armament is a potent and essential CAS tool, is it?
>
>Your strawman. I have said from the beginning that it is a last resort,
>only-when-nothing-else-should-be-tried-first tool,

One which is important enough to be fitted to all tactical aircraft, now
and forever, without doubt or question.

>and as such preserves
>flexibility for the system beyond that which exists sans guns. But hey, you
>tell me what the groundpounder who finds himself with a nasty situation
>located in that 25-to-500 meter danger-close gap in CAS coverage that
>results when no gun is available is supposed to do.

Get your head down and use available ordnance.

Now, what do you say to the groundpounder who finds a strafing pass or
two _doesn't_ stop the enemy?

>Either the gun needs
>> to be made significantly more effective in order to increase its
>> lethality and utilisation... or it needs replacing with something better
>> able to provide _effective_ close fire to troops in combat.
>
>But this is, by my own admission, a "niche" capability that probably does
>not merit much more resource dedication than it has already received.

And yet it is a sacrosanct future fit.

Can't do without it... but can't possibly improve on it either.

See the contradiction yet?

>A
>nice-to-have capability for use when none of the other tools are initially
>suitable or acceptable.

Is there a real need or not? (The evidence suggests there is). Is a
fixed aircraft gun the best solution? (The evidence strongly suggests
not).

>> Burdening most of your tactical air fleet with a thousand pounds of
>> ballast that's used on 0.05% of combat sorties is
>
>I guess the USAF is utterly clueless then, as they seem to disagree with
>you.

They don't pay my salary or ask my advice.

I notice that the USMC do seem to agree with me, as far as their version
of the JSF goes.

>I'd note that a fair portion of your own RAF was apparently not happy
>with the loss of the gun from the Typhoon. Do you know something none of
>these folks do?

That it's a lot more expensive to maintain the capability than most seem
to think (the idea that sorties are free, ranges sit fully manned but
unused for opportunity use, and logistic pipelines cost nothing).

I'd personally argue that once you've designed the gun into the aircraft
you might as well bite the bullet and keep it, but to do so means
finding the same saving in a different area: and the gun was the least
indispensible capability.

>> And you describe above how in at least one case, strafing failed to
>> deter the enemy and heavier weapons had to be resorted to.
>
>You are really having a problem with the idea that the ground commander
>would prefer to work *up* the risk ladder, don't you?

When the "low risk" option failed and the "high risk" option needed
using anyway, then it's a problem. (If the enemy had been advancing,
then the "high risk" option that actually succeeded might instead have
become OBE...)

An "option" that actually just wastes time is not a good option in my
opinion.

>Not jumping in and
>placing his ground troops at maximum risk from the outset?

Is the only risk from your own CAS?

>Odd, since you
>were so risk adverse when it came to allowing the CAS assets down into the
>weeds to make these sort of attacks.

Particularly since 'danger close' target identification is a very
difficult art even when you can give it full attention.

>> Similarly, one drag on developing a weapon for danger-close CAS is the
>> airy claim that "that's what the gun is for" when its effectiveness is
>> patchy (some reports of 'suppression' when it was used, but others where
>> the enemy declined to be deterred)

>Gee, if it really sucked so much, why did those CCT's keep calling for
>strafe as opposed to bombs in the first place?

How many times had they called for strafe against live enemies and seen
the results before? Combat is a learning experience.

>> Sounds like there's a need for a similar weight and accuracy of fire as
>> the AC-130 can deliver, but with the survivability of a fast jet.
>>
>> In your scenario, neither aircraft is particularly suitable: if the
>> AC-130 can't survive the SAM threat, repeated passes by fast movers will
>> also get them speared by those improved MANPADS (especially since
>> they're delivering a lot less firepower and so *need* to make multiple
>> passes through the weapon envelope of an alerted enemy... this is what
>> is technically known as a Really Bad Idea).
>
>Really Worse Idea is not being able to deliver support when the risk is
>assessed and accepted.

Which is where you end up with an enemy with improved air defences, if
your only 'danger close' argument is a fixed gun.

>> So where's the evidence for that?
>
>The same place as your evidence that the gun is worthless--a product of the
>argument. If you don't have a gun, and the bad guys are in so tight that you
>*can't* resort to a bomb,

Not the case here, note - or rather, when the guns failed then bombs had
to be used risks or not.

Suppose the enemy are even closer and the guns still don't stop them.
What then?

>then you are effectively saying CAS is out of the
>picture, so any increased losses could be attributed to that, at least in
>part.

Trouble is, saying "whether the gun is effective or not, it's all we've
got, so we must have it" is a thoroughly circular argument.

Why the fevered opposition to considering alternatives? "The USAF don't
use that", "that's an Army weapon", "nobody's cleared it for fast
movers" all sound suspiciously like excuses rather than reasons.

>> And the only options are 20mm cannon or 2000lb bombs? Think again. If
>> this is a genuine and frequent need, neither weapon is appropriate.
>
>Nobody said "frequent". I have noted before that you seem ready to place
>combat into the "nice neat box" category, where all things happen according
>to plan, and there is a playbook for handling the proceedings.

Your imagination, not reality. (I'm not the one advocating keeping a
'marginal infrequent' capability on the entire TacAir fleet).

>That just is
>not the way it happens. Which is why flexibility is important. And I hate to
>say it, but I think your empathy is a bit lacking--if it *were* you hugging
>the dirt up close and personal and well within the danger close margin for
>bombs, and you had the option of starting with guns and then working up
>through higher risk alternatives, I suspect you'd do that as opposed to
>starting with the more risky "big bang". It is a bit easier to say you
>wouldn't when you are not facing that dilemma.

And when that decision is made, and the Bad Guys keep shooting despite
strafe passes, and you take casualties?

Life isn't simple, and working your way up from "safe" to "risky"
options is sometimes a luxury.

Just out of interest, how close is "danger close" for mortar fire?
Officially it's 250 metres, but what's the _real_ danger close?

>> No, we're talking about current and future procurement.
>
>We have been using Anaconda as the point of discussion-the M61 was used in
>that role by both USAF and (IIRC) USN aircraft during that operation.

And using the results of that to inform future planning. Some new kit
may be integrated onto existing platforms, other issues may be for the
future.

Existing aircraft have the fit they do, it's the next step that's
controllable.

>> Unless you plan your only combat to be action replays, then you need to
>> learn what worked and what didn't; decide what lessons are valid and
>> which were special cases; and then plan for the future so you do more of
>> what worked, less of what didn't work and learn from the Lessons
>> Identified.

>Well, since it looks like the 25mm is going to be our next major gun caliber
>for the fast movers, maybe that will satisfy some of your concern.

So the F/A-22 is flying with a deficient weapon? :) How many lives will
_that_ cost? (I'll wager that USAF F-22s take as many air-to-air gun
shots as F-15s have)


>> About as acceptable as declaring that there's no particular problem that
>> a few strafing passes won't completely solve.
>
>Why would you claim that? I did not say any such thing.

So what did thegun actually _achieve_? Wasted some time while failing
to prevent the enemy returning fire, seems to be all.

>What I have been
>saying is that when the ground guys find themselves in such a knife fight
>and CAS is available, it is sure nice for that CAS to be able to contribute
>to the fight.

No argument at all. It needs to destroy the enemy: failing that, to
suppress and disrupt them enough to seriously interfere with their
operations.

>If it is successful in suppressing the bad guys (and I imagine
>that it usually will at least be able to achieve short-term suppression),

"Imagining" is not much use, Kevin.

>I can't understand what you find disagreeable about allowing
>those ground troops to escalate the risk level as needed, as opposed to
>having to accept that greater risk of fratricide from the outset if you have
>no gun capability.

Nothing at all - I want them to have an _effective_ option to use.

>> I'm not the one claiming four situations in 17,500 sorties demonstrates
>> a completely untouchable situation, Kevin.
>
>Neither am I; I shy away from such meaningless statistics.

But you're claiming that all tactical aircraft *must* have guns for just
this option.

>I recognize that
>strafe is the least preferable manner of delivering effective CAS.

So would a more effective and survivable method not be desirable?

Apparently not: it's "guns or nothing" for close engagements, now and
forever.

>I also
>recognize that there is a lot of ground radiating out from between 25 meters
>and (let's assume for the SDB which will shortly be in the inventory) maybe
>200 meters, and retaining the ability to conduct immediate CAS requests
>against such targets may very well mean the difference between
>success/failure for the mission or life/death for the troops.

Then why is the idea of looking at alternatives to cover that zone so
abhorrent?

>> Who has the option of operating above the light AAA, though MANPADS are
>> a problem there too.
>
>It does not matter how high he is operating-we don't like using the gunships
>for daylight operations. Khafji put paid to that approach.

It's a bloody expensive capability if you're limited to 50% utilisation,
but that's just my opinion.

You're happy to have fighters make predictable passes through MANPADS
and AAA come what may, but flying an AC-130 in daylight is Completely
Impossible? Weird priorities.

>> Given that the mortars should be one to two miles back at least (for
>> 81mm tubes, more for 120s) and artillery five to ten miles, that is one
>> _hell_ of a light AA gun or man-portable SAM that can detect and hit a
>> cargo flight at that distance while in contact with friendly troops and
>> under artillery fire. It's a *lot* easier to acquire and shoot at the
>> Big Loud Plane that just flew overhead.
>
>Here is where your "should be" falls apart on the rocks of reality.

How many ammunition resupply flights were shot down, then?

>During
>Anaconda the troops found themselves engaged a lot earlier, and a lot more
>heavily, than they predicted-that is war, with all of its uncertainty.

This is true, but irrelevant. How many resupply flights were shot down?

(The lesson might be "it hurts to underestimate an opponent" and
learning it might be more useful than bolting guns into yet another
generation of aircraft, but that's just me)

>So, I
>'d assume (though I have not read anything to corroborate this) that the
>plan was to have the mortars set up somewhere near the initial LZ's to cover
>the troops movement to contact.

I'm wary of assumptions - bear in mind the troops allegedly went in
without artillery support, it not being judged necessary. (Whoops...)

>By making contact a lot earlier than
>anticipated, that put the mortars up near the close fight, and made the
>resupply mission rather hazardous.

It seemed more that they had more missions than capability to fire,
rather than having their resupply destroyed.

>Tube arty in this case was another
>matter-Hagenbach, the MG in charge, has to shoulder the load for failing to
>have a firebase set up within range, but he apparently did not anticipate
>getting into a knifefight that precluded the use of the usual CAS delivered
>bombs from the outset. Which is why those CCT's ended up begging for
>strafing runs, again and again.

Precisely how many runs, out of interest? Both accounts of the battle
we've discussed indicate strafe was called but ineffective at the
start... and indicate that while bombs were called and used throughout,
strafe only seemed to feature in the first phase (against the bunker
that resisted it, until a PGM solved the problem)

And again, this comes into the category of planning for failure and
obsessing about "if we can't supply our mortars, don't bring artillery,
and then land right on top of the enemy, _then_ we need this capability"
- this isn't a convincing argument of why every tactical fighter in the
US inventory needs to have it available.

>> In at least one case the main armament had to be used anyway,
>> danger-close be damned.
>
> ONLY as a last resort.

Point being that the strafing runs were a time-wasting distraction.

>Common sense dictates that you don't start off
>treating a simple puncture wound to your hand by amputating the arm at the
>elbow, though that option may be exercised later if the mere cleaning and
>bandaging of the wound does not prevent blood poisoning.

Unless the septicaemia has spread by then or developed into gangrene
while you fiddle about with bandages. (Also, perhaps you need somewhere
between 'bandage and pray' and 'chop it off at the elbow'?)

>Likewise, those CCT
>'s did not jump directly to the risky use of bombs in a danger close
>situation until they had exhausted their other less risky options.

Luckily, the target wasn't advancing.

>> In four cases, with patchy results at best.
>
> They DID it, which is more than they could have done had they lacked
>those guns.

And they got very little result from it where results are available.

>> How about improving ground-to-air comms to shorten the targeting cycle?
>> More fuel, meaning more loiter time per aircraft, for more responsive
>> support? Both reduce the time needed from call-for-fire to delivery;
>> meaning instead of 'suppressing' the enemy with strafing passes, they
>> can be engaged with destructive weapons because they've had less time to
>> close. Or more payload, for a new munition that's got both short
>> danger-close and high lethality on target
>
> Huh? They "closed" almost instantaneously in this event, from what I
>have read. There was no detection of the bad guys in strength at 1000 meters
>followed by maneuver to within danger-close limits-for gosh sakes, they
>would have just pasted the guys with CAS delivered PGM's at the outset if
>they had known they were there.

So you're now defining capability based on one battle?

>> How many missions did they fly the next day? None. How much ordnance did
>> they deliver? None.
>
> And they hung around because the guys on the ground were in deep do-do
>and needed that support right then, not tomorrow. Tomorrow is meaningless if
>you are likely to die today.

Who's "you", Kevin? One unit of troops in contact? Don't the units
moving through them tomorrow who will be in contact but with less
support count?

Either this is an essential capability, or it isn't. If it's not
essential and the troops can cope without it, what's the problem with
doing without? If it _is_ essential but you lose a lot of aircraft
delivering it, there's a clear need to improve it.

>> And how many helicopters were available to fly sorties the next day, and
>> the day after, and how many men could have died as a result? Or, what
>> was cancelled because the air support they needed for backup suddenly
>> wasn't there?
>
> They were able to bring in replacement helos: IIRC some USMC AH-1W's
>showed up to handle the attack helo role subsequent to having those Apaches
>get shot up.

And where were they brought in _from_? Okay, if you've got so much
capability you totally overwhelm the foe then who cares? But that's not
always the case: realistically, "brought in as replacements" in one
theatre means "taken away from" another area.

>> Losing a half-squadron of AH-64s in a single incident suggests that
>> there's a serious capability gap, not that the existing systems are just
>> fine.
>>
>> Similarly, 88% attrition is _not_ sustainable.
>
> Any source for that number? ISTR reading that most of those helos were
>back up within the week (I only recall one being a write off at the time)?

My sources said seven of eight grounded for repairs of which two were
repaired and five never flew again (at least not in that conflict)

>> Because those were the only two options available to them, and neither
>> sound satisfactory: the LGBs worryingly lethal over too large an area,
>> the gun runs inadequately lethal.
>
> And they requested the gun runs in preference to the bombs-case
>closed.

Case reopened when they called for the bombs _anyway_ because the guns
failed to do the job.

By all means plan your procurement on "first request". I'll stick to
"what actually worked".

>> Tells me they need another option available to them.
>
> That may be, but I know of no other option that we can count on always
>being onboard the loadout of the CAS packages.

In other words, every US tactical aircraft _must_ have a gun, no debate,
no question.

>Even if APKWS was adopted by
>the USAF it would not be an integral weapon. As it stands now we can get
>some kind of CAS support at the 25 meters-from- friendlies- range from every
>fast mover CAS aircraft we have-that is called flexibility.

It's also called "ineffective" on the limited results available.

>> It must be wonderful having that much budget.

> It is. And as we discussed earlier, the gun is a marginal part of the
>total program cost.

Not when you run the numbers. $100 million up front and $8m a year
in-service adds up to some genuine money.

>> But the STOVL version is more, not less, likely to be performing CAS.
>> How then can the gun be optional, if it's so effective and essential.
>
> I did not say it was the most effective weapon-that is you twisting my
>words (again). I said it affords a greater degree of flexibility, especially
>in the very close fight, that you lose without the gun, and I believe that
>flexibility is very important.

So why delete it from the airframe most likely to have a heavy CAS
tasking?

>> Yet again, armament suites are not fixed forever.
>
> Ever try to specify what loadout you want from the air force side?

So you're now trying to solve institutional and doctrinal problems with
procurement?

>> Having the enemy "suppressed" for a pass or two is not a great return on
>> investment either.

> It is if it allows you to disengage, or if it allows you to maneuver
>to a position offering better cover, or if it allows you to conduct an
>assault to dislodge the bad guys.

None of which were true even after multiple gun passes, in the
documented combat example.

>I believe if you asked the average ground
>guy which he'd prefer to have, the ability to achieve short-term
>suppression, or the inability to suppress at all, he'd take the former

Actually, he'd want the Bad Guys made into Dead Guys (or at least Gone
Guys) and I doubt he'd care too much how it was done so long as it
worked.

>> So you don't have the right weapons for the job? (20mm lacks
>> effectiveness, current PGMs too generous in their danger zones)
>>
>> Bear in mind you're making force-wide assertions on the basis of 0.05%
>> of the offensive air sorties here.
>
> Paging Mr. McNamara.

Not sure what this means - you're the one using assertion and opinion to
inform decisions, not me.

> Glad to see you found the article, Paul. Too bad you can't understand
>the basic fact that those ground guys kept asking for strafing attacks
>because they did not want to escalate their own risk until/unless they had
>to.

And at some point you'll notice they switched ordnance because the
strafing runs failed and they needed something better, risks or not.

Luckily, this time the target was static and they had the time for this
progression.


I say that something better is needed. You're insisting that the status
quo is just fine and no improvement is possible. Something of an
impasse.


--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Chad Irby
December 15th 03, 12:37 AM
In article >,
"Paul F Austin" > wrote:

> "Chad Irby" wrote
> > "Paul F Austin" wrote:
> >
> > > "Chad Irby" wrote
> >
> > > > Which means, on cost terms, shooting down a big drone with a gun is
> > > > *very* cost-effective (a million-dollar airframe for a couple of
> hundred
> > > > bucks worth of ammo).
> > >
> > > Which makes using UAVs as justification for a gun, daft.
> >
> > Not "as justification," just "one more type of target."
> >
> > > By that argument, let's ditch all the expensive AAMs. UAVs are no
> > > more a justification for designing in a gun than is a handwave of
> > > "you never know..." which is a good description of the gun
> > > justifications seen here.
> >
> > So far, we have several different reasons for having guns in planes,
> > versus "we only need missiles to shoot down other planes."
> >
> > The argument for not having guns is, overall, pretty thin.
>
> No. To recapitulate: the first offering was "well, what are you going to do
> when the troops call for very, very CAS like they did in Operation
> Anaconda?". When Paul Adams fairly clearly demonstrated that gunnery CAS was
> remarkably ineffective in the event, needing to be followed up with bombs to
> actually do the job (remember bombs? They're an alternative to that gun you
> like).

So you want to carry bombs on every flight for impromptu CAS.

> Next up was "Well, how about shooting UAVs? There are bound to be so many
> that fighters will run out of missiles or alternatively (it wasn't clear)
> UAVs are so cheap and numerous as to not be worth a missile."

Not what I said, but go on...

> I pointed out the on the contrary, the UAVs large enough to be engaged by
> fighters, like G-Hawk and Predator are in fact high value platforms, more
> than worthy of a missile and you responded with (approximately) "You can too
> shoot down a Predator or G-Hawk with a gun", missing the point.

They might be "more than worthy," but once again, if you can see them
well enough to kill with a missile, you can certainly see them well
enough to kill with a gun. For a fraction of the cost (since you like
dollar comparisons), and more reliably.

> You (and others) still miss the point that I made and that Paul Adams made
> that in order to justify putting a gun on a new fighter (no fair, strawmen
> about stripping the guns off the current fleet), you have to justify the gun
> in terms of mission payoff_against other alternative uses of the budgets of
> time, money, weight, volume and power_. Because in real life, that's what
> you have to do.

That's what guns *do*. By adding one relatively small weapon, you get
something that can handle multiple tasks (air-to-ground, dogfighting,
UAV hunting, et cetera), while not excluding it from doing other
missions.

--
cirby at cfl.rr.com

Remember: Objects in rearview mirror may be hallucinations.
Slam on brakes accordingly.

John Keeney
December 15th 03, 02:28 AM
"Tony Williams" > wrote in message
...
> Alan Minyard > wrote in message
>...
> > On 12 Dec 2003 12:51:59 -0800, (Tony
Williams) wrote:
> >
> > >Chad Irby > wrote in message
>...
> > >> In article >,
> > >> (Tony Williams) wrote:
> > >>
> > >> > We know the Mauser works, too - it's been in service in large
numbers
> > >> > for two decades. The initial assessments by the JSF team concluded
> > >> > that the Mauser was the most cost-effective choice, and they knew
all
> > >> > about the GAU-12/U then.
> > >>
> > >> Part of that "cost effectiveness" appeared to be a lowball pricing
> > >> structure that fell through on closer examination.
> > >
> > >Do you have a source to support that? You may be right, but I like to
> > >work on hard info rather than forum gossip.
> > >
> > >Tony Williams
> > >Military gun and ammunition website: http://www.quarry.nildram.co.uk
> > >Discussion forum at: http://forums.delphiforums.com/autogun/messages/
> >
> > The Mouser was to be a completely new system, using linkless ammunition.
> > It has never been demonstrated, much less placed in service.
>
> The linkless feed was developed years ago and is used in the
> Eurofighter Typhoon installation, so is just about to enter service.
>
> So what have we determined?
>
> 1. The German Mauser BK 27 was selected by both Boeing and
> Lockheed-Martin over the GAU-12/U as the best and most cost-effective
> gun for the JSF (documented fact).
>
> 2. The cost of the gun rose well over budget (documented fact)
> probably because Mauser's US partners spent far too much on adapting
> it to US use (reasonable assumption).
>
> 3. GD, in their position of gun armament integrator, took advantage of
> the situation to slip in a lower bid for the GAU-12/U, which was
> accepted by L-M (clear conclusion from press statement).
>
> So to sum up, the F-35 will be getting the second-best gun because
> Mauser's US partners couldn't keep their costs down.

While your conclusion may or may not be accurate, it was certainly
sloppily arrived at.
If the most "cost-effective" gun goes up in cost that necessarily
impacts its cost effectiveness.

Tony Williams
December 15th 03, 07:44 AM
Alan Minyard > wrote in message >...
> On 14 Dec 2003 12:48:02 -0800, (Tony Williams) wrote:
>
> >Chad Irby > wrote in message >...
> >> In article >,
> >> (Tony Williams) wrote:
> >> >
> >> > So to sum up, the F-35 will be getting the second-best gun because
> >> > Mauser's US partners couldn't keep their costs down.
> >>
> >> No, the F-35 will be getting a gun that's at least as good, because the
> >> "cheap" gun wasn't nearly as cheap as we'd been led to believe.
> >
> >This from the Boeing press release in 1999:
> >
> >'Citing lower costs, greater lethality and improved supportability,
> >The Boeing Company has selected the Advanced 27mm Aircraft Cannon for
> >its next generation JSF combat aircraft.....The gun is also a
> >candidate for the Lockheed Martin version of the JSF...."It's the
> >lightest, most accurate and reliable gun based on our initial studies"
> >said Dennis Muilenburg, JSF weapon system director for Boeing. "Our
> >comparative assessment found the 27mm cannon to be more affordable,
> >more lethal and more supportable than any of its competitors".'
> >
> >Note that cost is only one of the factors mentioned. Words like 'more
> >lethal', 'lightest', 'most accurate and reliable' are in there too.
> >That provides no evidence for claiming that the GAU-12/U is 'at least
> >as good'.
> >
> >Tony Williams
> >Military gun and ammunition website: http://www.quarry.nildram.co.uk
> >Discussion forum at: http://forums.delphiforums.com/autogun/messages/
>
> The only thing being evaluated at that time were Mauser's press releases.
> When they started comparing real numbers the Mauser was toast.

If you believe that the US companies involved would have made such a
decision based on press releases, your opinion of them is far lower
than mine.

Incidentally, in contrast to the above, I recall that the recent
statement switching the choice to the GAU-12/U made no mention at all
of it being 'better'. Only cheaper.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Tony Williams
December 15th 03, 07:51 AM
"Brett" > wrote in message >...
> "Tony Williams" > wrote:
> | "Brett" > wrote in message
> >...
> | > "Tony Williams" > wrote:
> | > |
> | > | 1. The German Mauser BK 27 was selected by both Boeing and
> | > | Lockheed-Martin over the GAU-12/U as the best and most
> cost-effective
> | > | gun for the JSF (documented fact).
> | >
> | > That isn't a documented fact. The documented fact is that the
> GAU-12/U
> | > has just been selected as the best and most cost-effective gun for
> the
> | > JSF in open competition with the BK 27 (the original selection of
> the BK
> | > 27 in 2000 was not an open competition) by LMT.
> |
> | It's as well documented as the decision to use the GAU-12/U: the
> | source for both being official press statements, placed on the web.
> | You seem to be very selective in the press statements you're prepared
> | to credit.
>
> I'm not selective, you however appear to have misread more than one in
> recent days.
>
> | What makes you say that the original decision in favour of the BK 27
> | wasn't 'in open competition'?
>
> How about only one system bid on being included on the other candidate
> aircraft. It isn't "the best and most cost-effective" if it is the only
> one presented to the customer.
>
> | It was clear that when Boeing decided in
> | favour of the BK 27 in 1999, the GAU-12/U WAS in the frame, because GD
> | withdrew it from the JSF competition in 2000, just before L-M selected
> | the BK 27 as well (which looks very much like a case of 'resign before
> | you're sacked').
>
> Or it could be that GD believed the "press" on how effective the BK 27
> was. The evaluation by LMT after the JSF contract award would appear to
> have determined that the BK 27 wasn't that great an advance and that the
> GAU-12/U was just as effective.

You think that a company like GD would withdraw from a competition
because they're frightened of the opposition's press releases? That's
not my perception of US business attitudes.

Can you point me please to the source for the statement that "the BK
27 wasn't that great an advance and that the GAU-12/U was just as
effective".

I'm trying to sort out the facts of what happened here amongst the
usual forum smoke and mirrors. I mean, the arguments are fun but I do
prefer them to lead to some daylight.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Tony Williams
December 15th 03, 07:54 AM
"Paul F Austin" > wrote in message >...
> "Tony Williams" wrote in message
> >
> > What makes you say that the original decision in favour of the BK 27
> > wasn't 'in open competition'? It was clear that when Boeing decided in
> > favour of the BK 27 in 1999, the GAU-12/U WAS in the frame, because GD
> > withdrew it from the JSF competition in 2000, just before L-M selected
> > the BK 27 as well (which looks very much like a case of 'resign before
> > you're sacked').
>
> Tony, that almost never happens in US contracting. If you_do_withdraw an
> already submitted proposal it will cost you a lot of goodwill with the
> customer. Actually, companies commit to submitting a proposal when the RFP
> comes out and reneging of that commitment is not done lightly. I don't know
> why the GAU-12/U proposal was withdrawn but it was_not_to prevent the
> embarassment of losing.

Fascinating. I'd love to know why they pulled out, then. I vaguely
recall there were business manoeuverings going on at the time - was GD
trying to buy Mauser's US partner? If so, they might have regarded the
BK 27 as one of 'theirs' and decided that was the one to push.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Brett
December 15th 03, 10:36 AM
"Tony Williams" > wrote:
| "Brett" > wrote in message
>...
| > "Tony Williams" > wrote:

<...>

| > | It was clear that when Boeing decided in
| > | favour of the BK 27 in 1999, the GAU-12/U WAS in the frame,
because GD
| > | withdrew it from the JSF competition in 2000, just before L-M
selected
| > | the BK 27 as well (which looks very much like a case of 'resign
before
| > | you're sacked').
| >
| > Or it could be that GD believed the "press" on how effective the BK
27
| > was. The evaluation by LMT after the JSF contract award would appear
to
| > have determined that the BK 27 wasn't that great an advance and that
the
| > GAU-12/U was just as effective.
|
| You think that a company like GD would withdraw from a competition
| because they're frightened of the opposition's press releases? That's
| not my perception of US business attitudes.

Well that would depend on what they believed the actual requirements
were for the weapon and the "press" (from Boeing) on how well the BK 27
met those requirements.

| Can you point me please to the source for the statement that "the BK
| 27 wasn't that great an advance and that the GAU-12/U was just as
| effective".

The term used by Burbage was "comparable in technical performance" and
was part of this section of a Defense Daily article.

__Burbage emphasized that both the BK 27 and GAU-12 were able to meet
JSF's lethality requirements, which include probability of kill and
accuracy. He said the GAU-12, which has a higher rate of fire than the
BK 27, was able to meet the requirement by putting more rounds on the
target.
"Performance and affordability are equally important in our selection
process," Burbage said. "If we have two candidates that are comparable
in technical performance, but have significant differences in terms of
affordability, we will pick the one that is more affordable."

Burbage also said there were more technical negatives against the BK 27
than the GAU-12. Cost in three areas, unit recurring fly-away cost,
ammunition, and operational support, tilted the decision in favor of the
GAU-12, he said.

"In all three areas, there was a benefit to the GAU-12," Burbage said.__

see: http://stage.defensedaily.com/VIP/ddi/previous/ddi1122.htm#A3

| I'm trying to sort out the facts of what happened here amongst the
| usual forum smoke and mirrors. I mean, the arguments are fun but I do
| prefer them to lead to some daylight.

Wasn't "ammunition, and operational support" behind of the RAF's
"government problems" with the Typhoon BK 27 installation.

Tony Williams
December 15th 03, 09:24 PM
"Brett" > wrote in message >...
> "Tony Williams" > wrote:
>
> | Can you point me please to the source for the statement that "the BK
> | 27 wasn't that great an advance and that the GAU-12/U was just as
> | effective".
>
> The term used by Burbage was "comparable in technical performance" and
> was part of this section of a Defense Daily article.
>
> __Burbage emphasized that both the BK 27 and GAU-12 were able to meet
> JSF's lethality requirements, which include probability of kill and
> accuracy. He said the GAU-12, which has a higher rate of fire than the
> BK 27, was able to meet the requirement by putting more rounds on the
> target.
> "Performance and affordability are equally important in our selection
> process," Burbage said. "If we have two candidates that are comparable
> in technical performance, but have significant differences in terms of
> affordability, we will pick the one that is more affordable."
>
> Burbage also said there were more technical negatives against the BK 27
> than the GAU-12. Cost in three areas, unit recurring fly-away cost,
> ammunition, and operational support, tilted the decision in favor of the
> GAU-12, he said.
>
> "In all three areas, there was a benefit to the GAU-12," Burbage said.__
>
> see: http://stage.defensedaily.com/VIP/ddi/previous/ddi1122.htm#A3

Thanks, that's helpful.
>
> Wasn't "ammunition, and operational support" behind of the RAF's
> "government problems" with the Typhoon BK 27 installation.

I had the impression that the Eurofighter programme was taking a lot
of flak for being over budget, so the gun was offered up as a kind of
sacrificial lamb to appease the Treasury (the RAF probably figuring
that they could fit it later if required). Of course, when it turned
out that the first 55 or so were contractually committed anyway, and
the gun has to be carried by the plane whether it's used or not, they
looked rather silly. All they'll be saving will be the cost of ammo
and the maintenance/training requirements, which is not likely to be
huge as a percentage of the project. I'd lay a small bet that not long
after the Typhoon enters service, the RAF will suddenly find an urgent
operational need for activating the gun...

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Discussion forum at: http://forums.delphiforums.com/autogun/messages/

phil hunt
December 15th 03, 10:19 PM
On 15 Dec 2003 13:24:00 -0800, Tony Williams > wrote:
>
>I had the impression that the Eurofighter programme was taking a lot
>of flak for being over budget, so the gun was offered up as a kind of
>sacrificial lamb to appease the Treasury (the RAF probably figuring
>that they could fit it later if required). Of course, when it turned
>out that the first 55 or so were contractually committed anyway, and
>the gun has to be carried by the plane whether it's used or not, they
>looked rather silly. All they'll be saving will be the cost of ammo
>and the maintenance/training requirements, which is not likely to be
>huge as a percentage of the project. I'd lay a small bet that not long
>after the Typhoon enters service, the RAF will suddenly find an urgent
>operational need for activating the gun...

Wouldn't surprise me :-)

--
"It's easier to find people online who openly support the KKK than
people who openly support the RIAA" -- comment on Wikipedia
(Email: >, but first subtract 275 and reverse
the last two letters).

phil hunt
December 15th 03, 10:20 PM
On 14 Dec 2003 23:44:51 -0800, Tony Williams > wrote:
>Alan Minyard > wrote in message >...
>> On 14 Dec 2003 12:48:02 -0800, (Tony Williams) wrote:
>>
>> >Chad Irby > wrote in message >...
>> >> In article >,
>> >> (Tony Williams) wrote:
>> >> >
>> >> > So to sum up, the F-35 will be getting the second-best gun because
>> >> > Mauser's US partners couldn't keep their costs down.
>> >>
>> >> No, the F-35 will be getting a gun that's at least as good, because the
>> >> "cheap" gun wasn't nearly as cheap as we'd been led to believe.
>> >
>> >This from the Boeing press release in 1999:
>> >
>> >'Citing lower costs, greater lethality and improved supportability,
>> >The Boeing Company has selected the Advanced 27mm Aircraft Cannon for
>> >its next generation JSF combat aircraft.....The gun is also a
>> >candidate for the Lockheed Martin version of the JSF...."It's the
>> >lightest, most accurate and reliable gun based on our initial studies"
>> >said Dennis Muilenburg, JSF weapon system director for Boeing. "Our
>> >comparative assessment found the 27mm cannon to be more affordable,
>> >more lethal and more supportable than any of its competitors".'
>> >
>> >Note that cost is only one of the factors mentioned. Words like 'more
>> >lethal', 'lightest', 'most accurate and reliable' are in there too.
>> >That provides no evidence for claiming that the GAU-12/U is 'at least
>> >as good'.
>> >
>> >Tony Williams
>> >Military gun and ammunition website: http://www.quarry.nildram.co.uk
>> >Discussion forum at: http://forums.delphiforums.com/autogun/messages/
>>
>> The only thing being evaluated at that time were Mauser's press releases.
>> When they started comparing real numbers the Mauser was toast.
>
>If you believe that the US companies involved would have made such a
>decision based on press releases, your opinion of them is far lower
>than mine.
>
>Incidentally, in contrast to the above, I recall that the recent
>statement switching the choice to the GAU-12/U made no mention at all
>of it being 'better'. Only cheaper.

Do we have figures for the cost of either gun?

--
"It's easier to find people online who openly support the KKK than
people who openly support the RIAA" -- comment on Wikipedia
(Email: >, but first subtract 275 and reverse
the last two letters).

Bjørnar Bolsøy
December 15th 03, 10:23 PM
Chad Irby > wrote in
:

> The recent move to 25mm for the Gatling is a compromise in the
> "more damage per shot" trend, but still keeps the "more holes in
> the other guy" philosophy.

I think it speaks well of the modesty of the M61 compared
to both the GAU12 and BK27.


Regards..

Bjørnar Bolsøy
December 15th 03, 10:31 PM
(Tony Williams) wrote in
:

> Subject: Re: Best dogfight gun?
> From: (Tony Williams)
> Newsgroups: rec.aviation.military
>
> Alan Minyard > wrote in message
> >...
>>
>> You have no idea. The Mauser was an inferior weapon.
>
> Sources for that statement, please.
>
> These quotes are from an official JSF press release:
>
> 'Citing lower costs, greater lethality and improved
> supportability, The Boeing Company has selected the Advanced
> 27mm Aircraft Cannon for its next generation JSF combat
> aircraft.....

The G-A role for the JSF probably influenced that, 27mm
beging more effective on ground targets.



Regards...

Tony Williams
December 16th 03, 09:11 AM
"Brett" > wrote in message >...
>
> __Burbage emphasized that both the BK 27 and GAU-12 were able to meet
> JSF's lethality requirements, which include probability of kill and
> accuracy. He said the GAU-12, which has a higher rate of fire than the
> BK 27, was able to meet the requirement by putting more rounds on the
> target.
> "Performance and affordability are equally important in our selection
> process," Burbage said. "If we have two candidates that are comparable
> in technical performance, but have significant differences in terms of
> affordability, we will pick the one that is more affordable."
>
> Burbage also said there were more technical negatives against the BK 27
> than the GAU-12. Cost in three areas, unit recurring fly-away cost,
> ammunition, and operational support, tilted the decision in favor of the
> GAU-12, he said.
>
> "In all three areas, there was a benefit to the GAU-12," Burbage said.__
>
> see: http://stage.defensedaily.com/VIP/ddi/previous/ddi1122.htm#A3

Having studied that article, a couple of interesting points emerge.
The first is that GD withdrew its proposal for the GAU-12/U in
February 2000 "in part due to a belief that the gun did not meet the
necessary requirements." The second is the comment from Burbage that
"We spent a lot of time balancing performance and cost, looking for
best value."

I find it hard to imagine that GD would make such a mistake in
understanding the requirements (in my experience of tendering, it's
more usual for firms to submit non-compliant tenders then argue why
they should be accepted despite that!). Reading between the lines, it
seems most likely that the GAU-12/U did not meet the original
requirements, but when the costs of the BK 27 became an issue, L-M
revisted the requirements and "balanced" them to allow the GAU-12/U to
compete. Or am I just too cynical about the way things work? :)

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Brett
December 16th 03, 10:09 AM
"Tony Williams" > wrote:
> "Brett" > wrote in message
>...
> >
> > __Burbage emphasized that both the BK 27 and GAU-12 were able to meet
> > JSF's lethality requirements, which include probability of kill and
> > accuracy. He said the GAU-12, which has a higher rate of fire than the
> > BK 27, was able to meet the requirement by putting more rounds on the
> > target.
> > "Performance and affordability are equally important in our selection
> > process," Burbage said. "If we have two candidates that are comparable
> > in technical performance, but have significant differences in terms of
> > affordability, we will pick the one that is more affordable."
> >
> > Burbage also said there were more technical negatives against the BK 27
> > than the GAU-12. Cost in three areas, unit recurring fly-away cost,
> > ammunition, and operational support, tilted the decision in favor of the
> > GAU-12, he said.
> >
> > "In all three areas, there was a benefit to the GAU-12," Burbage said.__
> >
> > see: http://stage.defensedaily.com/VIP/ddi/previous/ddi1122.htm#A3
>
> Having studied that article, a couple of interesting points emerge.
> The first is that GD withdrew its proposal for the GAU-12/U in
> February 2000 "in part due to a belief that the gun did not meet the
> necessary requirements." The second is the comment from Burbage that
> "We spent a lot of time balancing performance and cost, looking for
> best value."
>
> I find it hard to imagine that GD would make such a mistake in
> understanding the requirements (in my experience of tendering, it's
> more usual for firms to submit non-compliant tenders then argue why
> they should be accepted despite that!). Reading between the lines, it
> seems most likely that the GAU-12/U did not meet the original
> requirements, but when the costs of the BK 27 became an issue, L-M
> revisted the requirements and "balanced" them to allow the GAU-12/U to
> compete. Or am I just too cynical about the way things work? :)

"Too cynical", the M61 20mm Vulcan was apparently also considered during the
evaluation and you appear to forget that all the results of the evaluation
would ultimately be judged by the Air Force JSF office.

Alan Minyard
December 16th 03, 03:13 PM
On 14 Dec 2003 23:44:51 -0800, (Tony Williams) wrote:

>Alan Minyard > wrote in message >...
>> On 14 Dec 2003 12:48:02 -0800, (Tony Williams) wrote:
>>
>> >Chad Irby > wrote in message >...
>> >> In article >,
>> >> (Tony Williams) wrote:
>> >> >
>> >> > So to sum up, the F-35 will be getting the second-best gun because
>> >> > Mauser's US partners couldn't keep their costs down.
>> >>
>> >> No, the F-35 will be getting a gun that's at least as good, because the
>> >> "cheap" gun wasn't nearly as cheap as we'd been led to believe.
>> >
>> >This from the Boeing press release in 1999:
>> >
>> >'Citing lower costs, greater lethality and improved supportability,
>> >The Boeing Company has selected the Advanced 27mm Aircraft Cannon for
>> >its next generation JSF combat aircraft.....The gun is also a
>> >candidate for the Lockheed Martin version of the JSF...."It's the
>> >lightest, most accurate and reliable gun based on our initial studies"
>> >said Dennis Muilenburg, JSF weapon system director for Boeing. "Our
>> >comparative assessment found the 27mm cannon to be more affordable,
>> >more lethal and more supportable than any of its competitors".'
>> >
>> >Note that cost is only one of the factors mentioned. Words like 'more
>> >lethal', 'lightest', 'most accurate and reliable' are in there too.
>> >That provides no evidence for claiming that the GAU-12/U is 'at least
>> >as good'.
>> >
>> >Tony Williams
>> >Military gun and ammunition website: http://www.quarry.nildram.co.uk
>> >Discussion forum at: http://forums.delphiforums.com/autogun/messages/
>>
>> The only thing being evaluated at that time were Mauser's press releases.
>> When they started comparing real numbers the Mauser was toast.
>
>If you believe that the US companies involved would have made such a
>decision based on press releases, your opinion of them is far lower
>than mine.

The point is that there WAS no decision. They were at the "concept" phase
of the project, and it was well understood by all concerned that nothing was
set in stone at that point.

Al Minyard

Alan Minyard
December 16th 03, 03:15 PM
On Mon, 15 Dec 2003 22:31:50 GMT, "Bjørnar Bolsøy" > wrote:

(Tony Williams) wrote in
:
>
>> Subject: Re: Best dogfight gun?
>> From: (Tony Williams)
>> Newsgroups: rec.aviation.military
>>
>> Alan Minyard > wrote in message
>> >...
>>>
>>> You have no idea. The Mauser was an inferior weapon.
>>
>> Sources for that statement, please.
>>
>> These quotes are from an official JSF press release:
>>
>> 'Citing lower costs, greater lethality and improved
>> supportability, The Boeing Company has selected the Advanced
>> 27mm Aircraft Cannon for its next generation JSF combat
>> aircraft.....
>
> The G-A role for the JSF probably influenced that, 27mm
> beging more effective on ground targets.
>
>
>
> Regards...

Catch up, please. The BK was scrapped in favor of the GAU-12

Al Minyard

Chad Irby
December 16th 03, 04:25 PM
In article >,
(Tony Williams) wrote:

> "Brett" > wrote:

> > see: http://stage.defensedaily.com/VIP/ddi/previous/ddi1122.htm#A3
>
> Reading between the lines, it
> seems most likely that the GAU-12/U did not meet the original
> requirements, but when the costs of the BK 27 became an issue, L-M
> revisted the requirements and "balanced" them to allow the GAU-12/U to
> compete. Or am I just too cynical about the way things work? :)

In other words, the GAU-12 cost a little bit more at the start (before
the Mauser cost inflations got out of hand), and when the Mauser started
getting really expensive, the GAU-12 could win.

--
cirby at cfl.rr.com

Remember: Objects in rearview mirror may be hallucinations.
Slam on brakes accordingly.

Alan Minyard
December 16th 03, 05:08 PM
On 16 Dec 2003 01:11:08 -0800, (Tony Williams) wrote:

>"Brett" > wrote in message >...
>>
>> __Burbage emphasized that both the BK 27 and GAU-12 were able to meet
>> JSF's lethality requirements, which include probability of kill and
>> accuracy. He said the GAU-12, which has a higher rate of fire than the
>> BK 27, was able to meet the requirement by putting more rounds on the
>> target.
>> "Performance and affordability are equally important in our selection
>> process," Burbage said. "If we have two candidates that are comparable
>> in technical performance, but have significant differences in terms of
>> affordability, we will pick the one that is more affordable."
>>
>> Burbage also said there were more technical negatives against the BK 27
>> than the GAU-12. Cost in three areas, unit recurring fly-away cost,
>> ammunition, and operational support, tilted the decision in favor of the
>> GAU-12, he said.
>>
>> "In all three areas, there was a benefit to the GAU-12," Burbage said.__
>>
>> see: http://stage.defensedaily.com/VIP/ddi/previous/ddi1122.htm#A3
>
>Having studied that article, a couple of interesting points emerge.
>The first is that GD withdrew its proposal for the GAU-12/U in
>February 2000 "in part due to a belief that the gun did not meet the
>necessary requirements." The second is the comment from Burbage that
>"We spent a lot of time balancing performance and cost, looking for
>best value."
>
>I find it hard to imagine that GD would make such a mistake in
>understanding the requirements (in my experience of tendering, it's
>more usual for firms to submit non-compliant tenders then argue why
>they should be accepted despite that!). Reading between the lines, it
>seems most likely that the GAU-12/U did not meet the original
>requirements, but when the costs of the BK 27 became an issue, L-M
>revisted the requirements and "balanced" them to allow the GAU-12/U to
>compete. Or am I just too cynical about the way things work? :)
>
>Tony Williams
>Military gun and ammunition website: http://www.quarry.nildram.co.uk
>Military gun and ammunition discussion forum:
>http://forums.delphiforums.com/autogun/messages/

The gun is selected by the USAF, not the contractor. (IIRC)

Al Minyard

Brett
December 16th 03, 10:24 PM
"Alan Minyard" > wrote:
> On 16 Dec 2003 01:11:08 -0800, (Tony
Williams) wrote:

<...>

> >I find it hard to imagine that GD would make such a mistake in
> >understanding the requirements (in my experience of tendering, it's
> >more usual for firms to submit non-compliant tenders then argue why
> >they should be accepted despite that!). Reading between the lines, it
> >seems most likely that the GAU-12/U did not meet the original
> >requirements, but when the costs of the BK 27 became an issue, L-M
> >revisted the requirements and "balanced" them to allow the GAU-12/U to
> >compete. Or am I just too cynical about the way things work? :)
> >
> >Tony Williams
> >Military gun and ammunition website: http://www.quarry.nildram.co.uk
> >Military gun and ammunition discussion forum:
> >http://forums.delphiforums.com/autogun/messages/
>
> The gun is selected by the USAF, not the contractor. (IIRC)

Is the cannon going to be GFE?
USAF I believe would approve/disapprove whatever cannon is selected by the
prime contractor based on the requirements outlined in the contract that was
awarded.

Tony Williams
December 17th 03, 01:07 AM
Alan Minyard > wrote in message >...
> On 14 Dec 2003 23:44:51 -0800, (Tony Williams) wrote:
>
> >Alan Minyard > wrote in message >...
> >> On 14 Dec 2003 12:48:02 -0800, (Tony Williams) wrote:
> >>
> >> >Chad Irby > wrote in message >...
> >> >> In article >,
> >> >> (Tony Williams) wrote:
> >> >> >
> >> >> > So to sum up, the F-35 will be getting the second-best gun because
> >> >> > Mauser's US partners couldn't keep their costs down.
> >> >>
> >> >> No, the F-35 will be getting a gun that's at least as good, because the
> >> >> "cheap" gun wasn't nearly as cheap as we'd been led to believe.
> >> >
> >> >This from the Boeing press release in 1999:
> >> >
> >> >'Citing lower costs, greater lethality and improved supportability,
> >> >The Boeing Company has selected the Advanced 27mm Aircraft Cannon for
> >> >its next generation JSF combat aircraft.....The gun is also a
> >> >candidate for the Lockheed Martin version of the JSF...."It's the
> >> >lightest, most accurate and reliable gun based on our initial studies"
> >> >said Dennis Muilenburg, JSF weapon system director for Boeing. "Our
> >> >comparative assessment found the 27mm cannon to be more affordable,
> >> >more lethal and more supportable than any of its competitors".'
> >> >
> >> >Note that cost is only one of the factors mentioned. Words like 'more
> >> >lethal', 'lightest', 'most accurate and reliable' are in there too.
> >> >That provides no evidence for claiming that the GAU-12/U is 'at least
> >> >as good'.
> >> >
> >> >Tony Williams
> >> >Military gun and ammunition website: http://www.quarry.nildram.co.uk
> >> >Discussion forum at: http://forums.delphiforums.com/autogun/messages/
> >>
> >> The only thing being evaluated at that time were Mauser's press releases.
> >> When they started comparing real numbers the Mauser was toast.
> >
> >If you believe that the US companies involved would have made such a
> >decision based on press releases, your opinion of them is far lower
> >than mine.
>
> The point is that there WAS no decision. They were at the "concept" phase
> of the project, and it was well understood by all concerned that nothing was
> set in stone at that point.

You're confusing 'decision' with 'contract'. The press release
announcing the switch to the GAU-12/U says that 'Lockheed Martin
originally selected the BK 27 cannon..' and 'Boeing also selected the
27mm cannon...'. Those were decisions, but like all contractual
arrangements could be changed until the contracts were formally
signed.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Discussion forum at: http://forums.delphiforums.com/autogun/messages/

Bjørnar Bolsøy
December 17th 03, 01:16 AM
Alan Minyard > wrote in
:
> On Mon, 15 Dec 2003 22:31:50 GMT, "Bjørnar Bolsøy"
> > wrote:
(Tony Williams) wrote in
:

>>>> You have no idea. The Mauser was an inferior weapon.
>>>
>>> Sources for that statement, please.
>>>
>>> These quotes are from an official JSF press release:
>>>
>>> 'Citing lower costs, greater lethality and improved
>>> supportability, The Boeing Company has selected the Advanced
>>> 27mm Aircraft Cannon for its next generation JSF combat
>>> aircraft.....
>>
>> The G-A role for the JSF probably influenced that, 27mm
>> beging more effective on ground targets.
>>
>>
>>
>> Regards...
>
> Catch up, please. The BK was scrapped in favor of the GAU-12

The point was that the M61 was scrapped in favor of the BK27.


Regards...

Brett
December 17th 03, 04:26 AM
"Emmanuel Gustin" > wrote:
> "Tony Williams" > wrote in message
> m...
> > "Brett" > wrote in message
> >...
>
> > they should be accepted despite that!). Reading between the lines, it
> > seems most likely that the GAU-12/U did not meet the original
> > requirements, but when the costs of the BK 27 became an issue, L-M
> > revisted the requirements and "balanced" them to allow the GAU-12/U to
> > compete. Or am I just too cynical about the way things work? :)
>
> Maybe the requirements were changed? IIRC the BK 27 will now
> be fixed internal armament only in the CTOL version of the F-35,
> which would reduce the importance of the biggest disadvantage of
> the GAU-12/U, its weight (and that of its ammunition). For the
> STOVL versions weight is more critical, and the BK 27 would
> have been the better choice.

Neither of the STOVL JSF proposals had an internal cannon so that probably
means the change occurred before even selected the BK 27 for the USAF
version.

Brett
December 17th 03, 04:29 AM
"Emmanuel Gustin" > wrote:
> "Tony Williams" > wrote in message
> m...
> > "Brett" > wrote in message
> >...
>
> > they should be accepted despite that!). Reading between the lines, it
> > seems most likely that the GAU-12/U did not meet the original
> > requirements, but when the costs of the BK 27 became an issue, L-M
> > revisted the requirements and "balanced" them to allow the GAU-12/U to
> > compete. Or am I just too cynical about the way things work? :)
>
> Maybe the requirements were changed? IIRC the BK 27 will now
> be fixed internal armament only in the CTOL version of the F-35,
> which would reduce the importance of the biggest disadvantage of
> the GAU-12/U, its weight (and that of its ammunition). For the
> STOVL versions weight is more critical, and the BK 27 would
> have been the better choice.

Neither of the STOVL JSF proposals had an internal cannon so that probably
means the change occurred before Boeing even selected the BK 27 for the USAF
version.

Tony Williams
December 17th 03, 07:36 AM
"Brett" > wrote in message >...
> "Tony Williams" > wrote:
> > "Brett" > wrote in message
> >...
> > >
> > > __Burbage emphasized that both the BK 27 and GAU-12 were able to meet
> > > JSF's lethality requirements, which include probability of kill and
> > > accuracy. He said the GAU-12, which has a higher rate of fire than the
> > > BK 27, was able to meet the requirement by putting more rounds on the
> > > target.
> > > "Performance and affordability are equally important in our selection
> > > process," Burbage said. "If we have two candidates that are comparable
> > > in technical performance, but have significant differences in terms of
> > > affordability, we will pick the one that is more affordable."
> > >
> > > Burbage also said there were more technical negatives against the BK 27
> > > than the GAU-12. Cost in three areas, unit recurring fly-away cost,
> > > ammunition, and operational support, tilted the decision in favor of the
> > > GAU-12, he said.
> > >
> > > "In all three areas, there was a benefit to the GAU-12," Burbage said.__
> > >
> > > see: http://stage.defensedaily.com/VIP/ddi/previous/ddi1122.htm#A3
> >
> > Having studied that article, a couple of interesting points emerge.
> > The first is that GD withdrew its proposal for the GAU-12/U in
> > February 2000 "in part due to a belief that the gun did not meet the
> > necessary requirements." The second is the comment from Burbage that
> > "We spent a lot of time balancing performance and cost, looking for
> > best value."
> >
> > I find it hard to imagine that GD would make such a mistake in
> > understanding the requirements (in my experience of tendering, it's
> > more usual for firms to submit non-compliant tenders then argue why
> > they should be accepted despite that!). Reading between the lines, it
> > seems most likely that the GAU-12/U did not meet the original
> > requirements, but when the costs of the BK 27 became an issue, L-M
> > revisted the requirements and "balanced" them to allow the GAU-12/U to
> > compete. Or am I just too cynical about the way things work? :)
>
> "Too cynical", the M61 20mm Vulcan was apparently also considered during the
> evaluation and you appear to forget that all the results of the evaluation
> would ultimately be judged by the Air Force JSF office.

Which suggests that the initial 'order of merit' after assessing how
well the competitors met the stated requirement was: first, BK 27,
second GAU-12/U, third M61A2.

That raises the interesting question of why the F/A-18E/F and F/A-22
are equipped with the M61A2 instead of the GAU-12/U - I have wondered
about that before. Yes, the M61 is lighter and faster-firing, but the
extra range, reduced shell flight time and much superior hitting power
would have more than compensated, I would have thought. After all, the
USAF originally planned to move to a 25mm gun in the early 1970s (the
GAU-7/A), and would have done so if it wasn't for technical problems
with the combustible-case ammo.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Brett
December 17th 03, 10:30 AM
"Tony Williams" > wrote:
> "Brett" > wrote in message
>...

<...>

> > "Too cynical", the M61 20mm Vulcan was apparently also considered during
the
> > evaluation and you appear to forget that all the results of the
evaluation
> > would ultimately be judged by the Air Force JSF office.
>
> Which suggests that the initial 'order of merit' after assessing how
> well the competitors met the stated requirement was: first, BK 27,
> second GAU-12/U, third M61A2.

No, it suggests that the group that actually had a "choice" in cannon
selection (Boeing) may have missed it as badly as they did with the rest of
their JSF proposal.

Alan Minyard
December 18th 03, 03:16 AM
On Tue, 16 Dec 2003 22:24:47 GMT, "Brett" > wrote:

>"Alan Minyard" > wrote:
>> On 16 Dec 2003 01:11:08 -0800, (Tony
>Williams) wrote:
>
><...>
>
>> >I find it hard to imagine that GD would make such a mistake in
>> >understanding the requirements (in my experience of tendering, it's
>> >more usual for firms to submit non-compliant tenders then argue why
>> >they should be accepted despite that!). Reading between the lines, it
>> >seems most likely that the GAU-12/U did not meet the original
>> >requirements, but when the costs of the BK 27 became an issue, L-M
>> >revisted the requirements and "balanced" them to allow the GAU-12/U to
>> >compete. Or am I just too cynical about the way things work? :)
>> >
>> >Tony Williams
>> >Military gun and ammunition website: http://www.quarry.nildram.co.uk
>> >Military gun and ammunition discussion forum:
>> >http://forums.delphiforums.com/autogun/messages/
>>
>> The gun is selected by the USAF, not the contractor. (IIRC)
>
>Is the cannon going to be GFE?
>USAF I believe would approve/disapprove whatever cannon is selected by the
>prime contractor based on the requirements outlined in the contract that was
>awarded.
>
I really do not know. On ships all of the guns are GFE, on aircraft I do not know.
I do know that the selection of weapons is a Govt decision, not the
contractors.

Al Minyard

Alan Minyard
December 18th 03, 03:16 AM
On 16 Dec 2003 17:07:27 -0800, (Tony Williams) wrote:

>Alan Minyard > wrote in message >...
>> On 14 Dec 2003 23:44:51 -0800, (Tony Williams) wrote:
>>
>> >Alan Minyard > wrote in message >...
>> >> On 14 Dec 2003 12:48:02 -0800, (Tony Williams) wrote:
>> >>
>> >> >Chad Irby > wrote in message >...
>> >> >> In article >,
>> >> >> (Tony Williams) wrote:
>> >> >> >
>> >> >> > So to sum up, the F-35 will be getting the second-best gun because
>> >> >> > Mauser's US partners couldn't keep their costs down.
>> >> >>
>> >> >> No, the F-35 will be getting a gun that's at least as good, because the
>> >> >> "cheap" gun wasn't nearly as cheap as we'd been led to believe.
>> >> >
>> >> >This from the Boeing press release in 1999:
>> >> >
>> >> >'Citing lower costs, greater lethality and improved supportability,
>> >> >The Boeing Company has selected the Advanced 27mm Aircraft Cannon for
>> >> >its next generation JSF combat aircraft.....The gun is also a
>> >> >candidate for the Lockheed Martin version of the JSF...."It's the
>> >> >lightest, most accurate and reliable gun based on our initial studies"
>> >> >said Dennis Muilenburg, JSF weapon system director for Boeing. "Our
>> >> >comparative assessment found the 27mm cannon to be more affordable,
>> >> >more lethal and more supportable than any of its competitors".'
>> >> >
>> >> >Note that cost is only one of the factors mentioned. Words like 'more
>> >> >lethal', 'lightest', 'most accurate and reliable' are in there too.
>> >> >That provides no evidence for claiming that the GAU-12/U is 'at least
>> >> >as good'.
>> >> >
>> >> >Tony Williams
>> >> >Military gun and ammunition website: http://www.quarry.nildram.co.uk
>> >> >Discussion forum at: http://forums.delphiforums.com/autogun/messages/
>> >>
>> >> The only thing being evaluated at that time were Mauser's press releases.
>> >> When they started comparing real numbers the Mauser was toast.
>> >
>> >If you believe that the US companies involved would have made such a
>> >decision based on press releases, your opinion of them is far lower
>> >than mine.
>>
>> The point is that there WAS no decision. They were at the "concept" phase
>> of the project, and it was well understood by all concerned that nothing was
>> set in stone at that point.
>
>You're confusing 'decision' with 'contract'. The press release
>announcing the switch to the GAU-12/U says that 'Lockheed Martin
>originally selected the BK 27 cannon..' and 'Boeing also selected the
>27mm cannon...'. Those were decisions, but like all contractual
>arrangements could be changed until the contracts were formally
>signed.
>
>Tony Williams
>Military gun and ammunition website: http://www.quarry.nildram.co.uk
>Discussion forum at: http://forums.delphiforums.com/autogun/messages/

The contractor does not decide on the weapons fit.

Al Minyard

Alan Minyard
December 18th 03, 03:16 AM
On Wed, 17 Dec 2003 01:16:17 GMT, "Bjørnar Bolsøy" > wrote:

>Alan Minyard > wrote in
:
>> On Mon, 15 Dec 2003 22:31:50 GMT, "Bjørnar Bolsøy"
>> > wrote:
(Tony Williams) wrote in
:
>
>>>>> You have no idea. The Mauser was an inferior weapon.
>>>>
>>>> Sources for that statement, please.
>>>>
>>>> These quotes are from an official JSF press release:
>>>>
>>>> 'Citing lower costs, greater lethality and improved
>>>> supportability, The Boeing Company has selected the Advanced
>>>> 27mm Aircraft Cannon for its next generation JSF combat
>>>> aircraft.....
>>>
>>> The G-A role for the JSF probably influenced that, 27mm
>>> beging more effective on ground targets.
>>>
>>>
>>>
>>> Regards...
>>
>> Catch up, please. The BK was scrapped in favor of the GAU-12
>
> The point was that the M61 was scrapped in favor of the BK27.
>
>
> Regards...

The M-61 was not a contender for the JSF, the GAU-12 was selected
over the BK.

Al Minyard

Alan Minyard
December 18th 03, 03:16 AM
On 16 Dec 2003 23:36:41 -0800, (Tony Williams) wrote:

>"Brett" > wrote in message >...
>> "Tony Williams" > wrote:
>> > "Brett" > wrote in message
>> >...
>> > >
>> > > __Burbage emphasized that both the BK 27 and GAU-12 were able to meet
>> > > JSF's lethality requirements, which include probability of kill and
>> > > accuracy. He said the GAU-12, which has a higher rate of fire than the
>> > > BK 27, was able to meet the requirement by putting more rounds on the
>> > > target.
>> > > "Performance and affordability are equally important in our selection
>> > > process," Burbage said. "If we have two candidates that are comparable
>> > > in technical performance, but have significant differences in terms of
>> > > affordability, we will pick the one that is more affordable."
>> > >
>> > > Burbage also said there were more technical negatives against the BK 27
>> > > than the GAU-12. Cost in three areas, unit recurring fly-away cost,
>> > > ammunition, and operational support, tilted the decision in favor of the
>> > > GAU-12, he said.
>> > >
>> > > "In all three areas, there was a benefit to the GAU-12," Burbage said.__
>> > >
>> > > see: http://stage.defensedaily.com/VIP/ddi/previous/ddi1122.htm#A3
>> >
>> > Having studied that article, a couple of interesting points emerge.
>> > The first is that GD withdrew its proposal for the GAU-12/U in
>> > February 2000 "in part due to a belief that the gun did not meet the
>> > necessary requirements." The second is the comment from Burbage that
>> > "We spent a lot of time balancing performance and cost, looking for
>> > best value."
>> >
>> > I find it hard to imagine that GD would make such a mistake in
>> > understanding the requirements (in my experience of tendering, it's
>> > more usual for firms to submit non-compliant tenders then argue why
>> > they should be accepted despite that!). Reading between the lines, it
>> > seems most likely that the GAU-12/U did not meet the original
>> > requirements, but when the costs of the BK 27 became an issue, L-M
>> > revisted the requirements and "balanced" them to allow the GAU-12/U to
>> > compete. Or am I just too cynical about the way things work? :)
>>
>> "Too cynical", the M61 20mm Vulcan was apparently also considered during the
>> evaluation and you appear to forget that all the results of the evaluation
>> would ultimately be judged by the Air Force JSF office.
>
>Which suggests that the initial 'order of merit' after assessing how
>well the competitors met the stated requirement was: first, BK 27,
>second GAU-12/U, third M61A2.
>
>That raises the interesting question of why the F/A-18E/F and F/A-22
>are equipped with the M61A2 instead of the GAU-12/U - I have wondered
>about that before. Yes, the M61 is lighter and faster-firing, but the
>extra range, reduced shell flight time and much superior hitting power
>would have more than compensated, I would have thought. After all, the
>USAF originally planned to move to a 25mm gun in the early 1970s (the
>GAU-7/A), and would have done so if it wasn't for technical problems
>with the combustible-case ammo.
>
>Tony Williams
>Military gun and ammunition website: http://www.quarry.nildram.co.uk
>Military gun and ammunition discussion forum:
>http://forums.delphiforums.com/autogun/messages/

The F-35 is optimized for air to ground, while the F-18 and F-22 are
optimized for air to air. Different targets, different guns. The GAU-12
is also used in ground to air.

Al Minyard

Brett
December 18th 03, 03:41 AM
"Alan Minyard" > wrote:
> On Tue, 16 Dec 2003 22:24:47 GMT, "Brett" > wrote:
>
> >"Alan Minyard" > wrote:
> >> On 16 Dec 2003 01:11:08 -0800, (Tony
> >Williams) wrote:
> >
> ><...>
> >
> >> >I find it hard to imagine that GD would make such a mistake in
> >> >understanding the requirements (in my experience of tendering, it's
> >> >more usual for firms to submit non-compliant tenders then argue why
> >> >they should be accepted despite that!). Reading between the lines, it
> >> >seems most likely that the GAU-12/U did not meet the original
> >> >requirements, but when the costs of the BK 27 became an issue, L-M
> >> >revisted the requirements and "balanced" them to allow the GAU-12/U to
> >> >compete. Or am I just too cynical about the way things work? :)
> >> >
> >> >Tony Williams
> >> >Military gun and ammunition website: http://www.quarry.nildram.co.uk
> >> >Military gun and ammunition discussion forum:
> >> >http://forums.delphiforums.com/autogun/messages/
> >>
> >> The gun is selected by the USAF, not the contractor. (IIRC)
> >
> >Is the cannon going to be GFE?
> >USAF I believe would approve/disapprove whatever cannon is selected by
the
> >prime contractor based on the requirements outlined in the contract that
was
> >awarded.
> >
> I really do not know. On ships all of the guns are GFE, on aircraft I do
not know.
> I do know that the selection of weapons is a Govt decision, not the
> contractors.

Approval of whatever selection is made by the prime contractor would be, but
according to the GD fact sheet on the JSF program the contract to design
produce and integrate the weapon for the JSF was awarded to GD by LMT, not
the US Government.

http://www.gdatp.com/products/lethality/jsf/JSF.pdf

Tony Williams
December 18th 03, 08:33 AM
Alan Minyard > wrote in message >...
> On 16 Dec 2003 23:36:41 -0800, (Tony Williams) wrote:
>
> >Which suggests that the initial 'order of merit' after assessing how
> >well the competitors met the stated requirement was: first, BK 27,
> >second GAU-12/U, third M61A2.
> >
> >That raises the interesting question of why the F/A-18E/F and F/A-22
> >are equipped with the M61A2 instead of the GAU-12/U - I have wondered
> >about that before. Yes, the M61 is lighter and faster-firing, but the
> >extra range, reduced shell flight time and much superior hitting power
> >would have more than compensated, I would have thought. After all, the
> >USAF originally planned to move to a 25mm gun in the early 1970s (the
> >GAU-7/A), and would have done so if it wasn't for technical problems
> >with the combustible-case ammo.
>
> The F-35 is optimized for air to ground, while the F-18 and F-22 are
> optimized for air to air. Different targets, different guns. The GAU-12
> is also used in ground to air.

Agreed. However, every other nation obviously believes that 27-30mm
guns are nowadays the optimum for fitting to air superiority fighters
as well as for air-to-ground. Even the USAF seemed to believe that a
more powerful weapon was needed for the F-15 fighter when the GAU-7/A
was specified (and although still only 25mm, that was much more potent
than the GAU-12/U).

When guns were still important in air-to-air, around 1970, the RAF
carried out an assessment of the effectiveness of the available
weapons and concluded that the best fighter gun on the market was the
30mm Oerlikon KCA (as fitted to the SAAB Viggen) which fires massive
cartridges as powerful as the A-10's GAU-8/A (in fact, the GAU-8/A's
cartridge was derived from the KCA's).

In the light of all of this, I wonder if the GAU-12/U was even
considered for the F/A-22 and F/A-18E/F? If so, it would be
interesting to see the assessment.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Tony Williams
December 18th 03, 08:37 AM
"Brett" > wrote in message >...
>
> Approval of whatever selection is made by the prime contractor would be, but
> according to the GD fact sheet on the JSF program the contract to design
> produce and integrate the weapon for the JSF was awarded to GD by LMT, not
> the US Government.
>
> http://www.gdatp.com/products/lethality/jsf/JSF.pdf

As a matter of interest, has a contract between L-M and GD for the
delivery of the GAU-12/U actually been signed yet? Or are they still
'engaged' rather than 'married' :-) There was no mention of such a
contract in the recent 'Flight International' special on the F-35,
which included a diary of formal contracts.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Brett
December 18th 03, 11:02 AM
"Tony Williams" > wrote:
> Alan Minyard > wrote

<...>

> > The F-35 is optimized for air to ground, while the F-18 and F-22 are
> > optimized for air to air. Different targets, different guns. The GAU-12
> > is also used in ground to air.
>
> Agreed. However, every other nation obviously believes that 27-30mm
> guns are nowadays the optimum for fitting to air superiority fighters
> as well as for air-to-ground.

Every other nation that has "signed up" for the JSF would appear to have has
also signed up for an internal or pod version of the 25mm GAU-12/U. That
includes the UK whose current views also include that the BK-27 carried by
their Typoons is only there as ballast :-)

Tony Williams
December 18th 03, 04:08 PM
"Brett" > wrote in message >...
> "Tony Williams" > wrote:
> > Alan Minyard > wrote
>
> <...>
>
> > > The F-35 is optimized for air to ground, while the F-18 and F-22 are
> > > optimized for air to air. Different targets, different guns. The GAU-12
> > > is also used in ground to air.
> >
> > Agreed. However, every other nation obviously believes that 27-30mm
> > guns are nowadays the optimum for fitting to air superiority fighters
> > as well as for air-to-ground.
>
> Every other nation that has "signed up" for the JSF would appear to have has
> also signed up for an internal or pod version of the 25mm GAU-12/U. That
> includes the UK whose current views also include that the BK-27 carried by
> their Typoons is only there as ballast :-)

That's hardly surprising as the cost of developing a different gun
installation would be enormous. For the same reason, the 20mm M61 is
in widespread foreign use simply because US fighters come with it as
standard, not because anyone specifically chose that gun. The only
recent example I can think of, of any non-US maker willingly choosing
a 20mm gun, is the new Korean AT-50, which uses what is essentially a
three-barrel version of the M61A2; but that is a light trainer/attack
plane. Before that, there was the Italian version of the AMX light
strike plane, which fits the M61 presumably because Italy already had
it in service in the F-104; the Brazilian version of the AMX has 30mm
cannon.

Don't talk to me about the RAF's attitude :-( The kindest
interpretation I can put on it is that they offered up the Eurofighter
gun as a saving, knowing they could always add it back later...

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Alan Minyard
December 18th 03, 05:47 PM
>> >> The gun is selected by the USAF, not the contractor. (IIRC)
>> >
>> >Is the cannon going to be GFE?
>> >USAF I believe would approve/disapprove whatever cannon is selected by
>the
>> >prime contractor based on the requirements outlined in the contract that
>was
>> >awarded.
>> >
>> I really do not know. On ships all of the guns are GFE, on aircraft I do
>not know.
>> I do know that the selection of weapons is a Govt decision, not the
>> contractors.
>
>Approval of whatever selection is made by the prime contractor would be, but
>according to the GD fact sheet on the JSF program the contract to design
>produce and integrate the weapon for the JSF was awarded to GD by LMT, not
>the US Government.
>
>http://www.gdatp.com/products/lethality/jsf/JSF.pdf
>

They can award a sub-contract, but the decision as to what weapon to use
is up to the Pentagon.

Al Minyard

Bjørnar Bolsøy
December 18th 03, 06:04 PM
Alan Minyard > wrote in
:
> On Wed, 17 Dec 2003 01:16:17 GMT, "Bjørnar Bolsøy"
> > wrote:
>>Alan Minyard > wrote in
:
>>> On Mon, 15 Dec 2003 22:31:50 GMT, "Bjørnar Bolsøy"
>>> > wrote:
(Tony Williams) wrote in
:
>>
>>>>>> You have no idea. The Mauser was an inferior weapon.
>>>>>
>>>>> Sources for that statement, please.
>>>>>
>>>>> These quotes are from an official JSF press release:
>>>>>
>>>>> 'Citing lower costs, greater lethality and improved
>>>>> supportability, The Boeing Company has selected the Advanced
>>>>> 27mm Aircraft Cannon for its next generation JSF combat
>>>>> aircraft.....
>>>>
>>>> The G-A role for the JSF probably influenced that, 27mm
>>>> beging more effective on ground targets.
>>>>
>>>>
>>>>
>>>> Regards...
>>>
>>> Catch up, please. The BK was scrapped in favor of the GAU-12
>>
>> The point was that the M61 was scrapped in favor of the BK27.
>>
>>
>> Regards...
>
> The M-61 was not a contender for the JSF,

I thought it was.


> the GAU-12 was
> selected over the BK.

That the BK was selected over the GAU12 initially hardly
points to an inferior weapon.


Regards...

Brett
December 18th 03, 11:14 PM
"Alan Minyard" > wrote:
> >> >> The gun is selected by the USAF, not the contractor. (IIRC)
> >> >
> >> >Is the cannon going to be GFE?
> >> >USAF I believe would approve/disapprove whatever cannon is selected by
> >the
> >> >prime contractor based on the requirements outlined in the contract
that
> >was
> >> >awarded.
> >> >
> >> I really do not know. On ships all of the guns are GFE, on aircraft I
do
> >not know.
> >> I do know that the selection of weapons is a Govt decision, not the
> >> contractors.
> >
> >Approval of whatever selection is made by the prime contractor would be,
but
> >according to the GD fact sheet on the JSF program the contract to design
> >produce and integrate the weapon for the JSF was awarded to GD by LMT,
not
> >the US Government.
> >
> >http://www.gdatp.com/products/lethality/jsf/JSF.pdf
> >
>
> They can award a sub-contract, but the decision as to what weapon to use
> is up to the Pentagon.

What "weapon to use" is defined by the specifications if the "weapon to use"
isn't GFE or identified specifically in the contract. The news article at
the end of last year was:

"Lockheed Martin Drops BK 27 Cannon For GD's GAU-12 For JSF By Neil
Baumgardner.
Lockheed Martin [LMT] last week decided to change the cannon in its F-35
Joint Strike Fighter (JSF), dropping the longstanding BK 27 27mm gun offered
by Alliant Techsystems" (Defense Daily November 2002).

No comment appeared in that article that the Pentagon had dropped the BK 27.
The Pentagon's role in this instance appears to be, does the "weapon
selected" meet contract requirements.

Hog Driver
December 19th 03, 12:48 AM
> > > >Ed,
> > > >
> > > >What is the difference between direct close airsupport, and close
> > > >airsupport, or is it just all lumped together and called close air
> > > >support.

I think what you might be referring to is Close Air Support and Troops In
Contact. Troops In Contact is a type of CAS where the troops are in direct
fire with the enemy. General rule of thumb is if the bad guys are one
kilometer or less from the good guys, it's a TIC situation. That range can
be a lot greater depending on the situation (i.e. - tank v. tank
engagement).

> > > Sounds like some sort of semantic argument. I never heard the term
> > > "direct close air support" used in any official context. Close Air
> > > Support is the employment of tac air assets in direct support of
> > > ground units. It would, by its very nature be "direct".
> >
> > The only distinctions I am aware of are between CAS (i.e. hitting the
> > enemy's front line) and BAI (Battlefield Air Interdiction) which is
> > hitting the enemy's assets slightly behind their front line to get
> > supplies, units moving up etc.
>
> There are two types of CAS--immediate and preplanned. Preplanned icludes
CAS
> sorties integrated into the ground maneuver plan and submitted IAW the
ATO.
> Immediate CAS is not included in the ATO (at least not specifically; CAS
> sorties can be included in the ATO without specifications, from what I
> gather, sort of a "CAS reserve") and addresses those situations not
foreseen
> in the planning process. According to CGSC ST 100-3 (1996 edition),
> immediate CAS provides the commander with flexibility, and can be used to
> exploit success, reinforce or retain momentum, deal with enemy
> counterattacks, and provide security.

This is old stuff. Pre-planned CAS still exists largely as you describe it,
but the other type of CAS which used to be 'immediate' CAS (as it exists on
an ATO) is X-CAS, or 'Push' CAS. The idea is to have a predetermined number
of assets airborne for a particular Vul period, either in a CAS stack or in
kill boxes. These assets can then be assigned to do a variety of tasks,
such as striking a TST (time sensitive target), immediate CAS request from a
FAC forwarded to the ASOC, emergency CAS for non-FAC qualified troops, etc.

The new book on JCAS is the 3-09.3, and while it doesn't deal with the ATO
aspects (in the Air Force the reference for that would be the 3-1), it is
very much the TT&P on how to do CAS today.

> Either Buffdriver or the resident Strike eagle Driver might be able to
shed
> light on any doctrinal changes in the CAS arena that have occurred since
the
> publication of that text.
>
> Brooks

Give me a second while I stow my used barf-bag. I realize that CAS is a
mission, not an aircraft, but there is an aircraft in the inventory that
does the mission better than any other. Dropping a JDAM on coordinates just
isn't going to work for TIC situations, for starters.

> > Of course, since some elements of 'CAS' are now delivered from bombers
> > cruising at altitude, perhaps they've added to the nomenclature!

*BARF*!!!

Hog Driver
December 19th 03, 01:07 AM
<snip enormously long diatribe arguing against the effectiveness of a gun
for CAS>

> Again, not a ringing endorsement of the strafing runs...

> Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Paul -

20mm is particularly ineffective for the type of CAS in the stories you use
to argue your point. Additionally, these were Mud Hen guys who don't train
to strafe, and in fact hadn't practiced strafe since they left the RTU.
They also didn't press in close enough to decrease the bullet dispersion,
which would also allow for an increase in energy when the bullets impacted.
I doubt you've seen the HUD footage from that mission, but I can tell you in
the valley they were operating in I wouldn't have taken an E model any
closer than they did. This is not a slam against the Mud Hen guys, they did
great work, but they simply don't train to use the gun like Warthog pilots
do.

I will venture to say with great certainty if A-10s had been doing the
shooting, there wouldn't have been a need for a Maverick or bomb pass
follow-up.

ATTACK!

Hog Driver
December 19th 03, 06:44 AM
> >So they only used the bombs when it was a factor of outright
> >survival--understandable IMO.
>
> Still hardly a persuasive argument why the guns are indispensible. Why
> wasn't 20mm able to adequately suppress, deter or destroy the enemy?

Large dispersion from long slant range by crews who hadn't strafed since the
F-15E school house. That isn't the only reason, but it goes a long way
towards understanding why the strafe passes didn't work so well.

> >APKWS is currently planned for use only on rotary assets, beginning in
2006
> >IIRC.
>
> Again, is that because it is physically impossible to adapt it or
> develop something similar? Has analysis shown that it would be
> ineffective? Or is it "not in the plan, we just strafe for danger
> close"?

Who is to say whether it will be employed on fixed-wing aircraft. 2006
isn't here yet.

> > You seem to forget that the min
> >separation factor for 20mm is *25 meters*
>
> Which tells you much about its lethality, no?

No, it doesn't. With the dispersion rate of a group of 20mm rounds, you
have a lot higher likelihood of hitting what your aiming at and minimizing
collateral damage. Bombs can get ugly in a hurry with troops in contact,
hence the much larger radius of .1% probability of incompacitation of troops
farther from the bomb impact.

> >, while for bombs that minimum
> >jumps to between 145 and 500 meters (depending upon whether you are in a
> >protected or open position).
>
> And those are the only options that can be considered?

What do you suggest? Since this discussion has digressed from best dogfight
gun to why you need (or don't need) a gun for close air support, I'd love to
hear what you have to say about the A-10 and pilots who practice with their
gun for CAS on almost every sortie.

Paul F Austin
December 19th 03, 11:33 AM
"Hog Driver" wrote
>
> > >, while for bombs that minimum
> > >jumps to between 145 and 500 meters (depending upon whether you are in
a
> > >protected or open position).
> >
> > And those are the only options that can be considered?
>
> What do you suggest? Since this discussion has digressed from best
dogfight
> gun to why you need (or don't need) a gun for close air support, I'd love
to
> hear what you have to say about the A-10 and pilots who practice with
their
> gun for CAS on almost every sortie.

It says that if CAS requires a gunfire component then we need a 'Hog or
'Hog-equivalent to fly the mission. It says little about whether a gun
should be part of the baseline for e.g., the F-35. A-10s are specifically
designed for that mission with protection, airspeed and ammo tank size all
optimized for it. A fast(er)-mover with no protection, with a small ammo
tank is a move back to the "any old fighter will do" school of CAS, the one
that the Air Force keeps trying to return to everytime the notion of
replacing A-10s with F-16s gets floated.

On the other hand, in discussing the baseline for new fighters here, some
have drug out the CAS argument to buttress the notion that a gun should be
designed into any new fighter. If seems to me that all the arguments in
favor of including a gun are along the lines of "marginal utility in all
roles but covering many roles, low cost, flexible asset" lines which is fair
enough. No one has argued that a gun is a key element of a new fighter,
instead we've been discussing how much a gun offers in the margin in both A
to A and CAS applications and which gun is best for it.

Paul J. Adam
December 19th 03, 08:25 PM
In message >, Hog Driver
> writes
>> >So they only used the bombs when it was a factor of outright
>> >survival--understandable IMO.
>>
>> Still hardly a persuasive argument why the guns are indispensible. Why
>> wasn't 20mm able to adequately suppress, deter or destroy the enemy?
>
>Large dispersion from long slant range by crews who hadn't strafed since the
>F-15E school house. That isn't the only reason, but it goes a long way
>towards understanding why the strafe passes didn't work so well.

Which is one of the reasons I'm not convinced that "a gun on every
aircraft because we might need it for CAS" is a compelling argument.

>> Again, is that because it is physically impossible to adapt it or
>> develop something similar? Has analysis shown that it would be
>> ineffective? Or is it "not in the plan, we just strafe for danger
>> close"?
>
>Who is to say whether it will be employed on fixed-wing aircraft. 2006
>isn't here yet.

And won't ever be a fixed-wing date (later than 2006 for sure), if the
attitude persists that "there's no need for anything better, a strafing
pass will do just fine".

>> Which tells you much about its lethality, no?
>
>No, it doesn't.

Back when I was an infantryman we trained to keep at least ten metres
between troops; how many enemy troops can you get per pass with a 25m
danger space?

>> And those are the only options that can be considered?
>
>What do you suggest?

Adapting APKWS for fast movers is one potential, different guns another
(maybe something in 30mm firing AHEAD ammunition? The US is adopting it
for the AAAV and the Germans for the Puma). Really Small Diameter Bombs
with GPS or laser guidance?

Is there a need? Quite possibly so. Is it met by existing systems? Not
fully, it seems. What's the requirement? Something flexible, multirole,
weighing under a thousand pounds (and not too much drag) for several
(four or five) shots, with significantly more lethality and
effectiveness than the M61, preferably without eating hardpoints.
Laser-guided 70mm with multirole fuzes (prox for air targets or
dispersed troops, impact for soft targets, delay for bunkers and light
armour) is one example candidate.

>Since this discussion has digressed from best dogfight
>gun to why you need (or don't need) a gun for close air support, I'd love to
>hear what you have to say about the A-10 and pilots who practice with their
>gun for CAS on almost every sortie.

Concerns about survivability in a MANPADS environment, but the A-10's
gun backed by a trained pilot is a much better tool for the task than a
M61 on a F-15. (The A-10 was _designed_ for the job, it would be
embarrassing if it wasn't capable)

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Chad Irby
December 19th 03, 10:20 PM
In article >,
"Paul J. Adam" > wrote:

> In message >, Hog Driver
> > writes

> >Large dispersion from long slant range by crews who hadn't strafed since the
> >F-15E school house. That isn't the only reason, but it goes a long way
> >towards understanding why the strafe passes didn't work so well.
>
> Which is one of the reasons I'm not convinced that "a gun on every
> aircraft because we might need it for CAS" is a compelling argument.

....and if that were the only argument, you might have a point.

But since several people have pointed out other good reasons to have
guns on fighters, and since you haven't come up with a good reason to
*not* have one (one more missile or a minute's worth of fuel aren't very
good reasons at all), the only thing left is to think about cost, and
since guns for planes are a very small amount of the final sticker price
of a modern plane...

--
cirby at cfl.rr.com

Remember: Objects in rearview mirror may be hallucinations.
Slam on brakes accordingly.

Paul J. Adam
December 19th 03, 10:27 PM
In message >, Hog Driver
> writes
><snip enormously long diatribe arguing against the effectiveness of a gun
>for CAS>
>> Again, not a ringing endorsement of the strafing runs...

>I will venture to say with great certainty if A-10s had been doing the
>shooting, there wouldn't have been a need for a Maverick or bomb pass
>follow-up.

I'll agree completely, but then you won't fit the A-10's gun system into
a thousand pounds: nearest handy source says 1723 kilograms loaded
weight, or four times a typical M61 installation. (All that extra energy
comes at a cost...)

Can you put four thousand pounds into every tactical fighter 'just in
case'? It's a specialised weapon.


One issue I'd like a horse's mouth job on - I'd heard claims the A-10s
were pulled out of Afghanistan, or at least had their role reduced,
because of issues about their performance in hot, high-altitude
conditions. True, Chinese whisper, false?

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Paul J. Adam
December 19th 03, 10:36 PM
In message >, Chad Irby
> writes
>In article >,
> "Paul J. Adam" > wrote:
>> Which is one of the reasons I'm not convinced that "a gun on every
>> aircraft because we might need it for CAS" is a compelling argument.
>
>...and if that were the only argument, you might have a point.
>
>But since several people have pointed out other good reasons to have
>guns on fighters, and since you haven't come up with a good reason to
>*not* have one (one more missile or a minute's worth of fuel aren't very
>good reasons at all),

Shame that you give up a lot more than that even for a 20mm
installation.

>the only thing left is to think about cost, and
>since guns for planes are a very small amount of the final sticker price
>of a modern plane...

If you think that's the case, _you_ pay for integration, installation,
maintenance and training.

It adds up to a pretty decent chunk of change.

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Chad Irby
December 19th 03, 10:58 PM
In article >,
"Paul J. Adam" > wrote:

> Chad Irby > writes

> >But since several people have pointed out other good reasons to have
> >guns on fighters, and since you haven't come up with a good reason to
> >*not* have one (one more missile or a minute's worth of fuel aren't very
> >good reasons at all),
>
> Shame that you give up a lot more than that even for a 20mm
> installation.

Not really. Fuel is heavy as hell, and missiles (plus the hardpoints,
plus the fire controls for them) aren't as light as you'd think for a
useful one. Then there's the external drag and area issues. As long as
you're not hauling around GAU-8 installs, the weight isn't that extreme.
And especially when you consider the weight per shot (a half-dozen 20mm
bursts versus even one or two missiles) is pretty darned reasonable.

> >the only thing left is to think about cost, and
> >since guns for planes are a very small amount of the final sticker price
> >of a modern plane...
>
> If you think that's the case, _you_ pay for integration, installation,
> maintenance and training.
>
> It adds up to a pretty decent chunk of change.

Not compared to keeping even *more* missiles in the inventory, and the
increased inventory of very expensive hardware to keep checking them and
making them work. Even something as simple as an AIM-9 takes a boatload
of work to keep functional, whether you fire them or not. And when you
*do* fire them in practice, you're burning off, in one shot, most of the
lifetime cost of a small gun system...

--
cirby at cfl.rr.com

Remember: Objects in rearview mirror may be hallucinations.
Slam on brakes accordingly.

Paul J. Adam
December 20th 03, 01:31 PM
In message >, Chad Irby
> writes
>In article >,
> "Paul J. Adam" > wrote:
>> Chad Irby > writes
>> Shame that you give up a lot more than that even for a 20mm
>> installation.
>
>Not really. Fuel is heavy as hell, and missiles (plus the hardpoints,
>plus the fire controls for them) aren't as light as you'd think for a
>useful one.

So you can shovel a thousand pounds of ballast into a F-16 without any
concerns?

Here's a hint - modern aircraft are more limited by fuel and payload,
than by numbers of pylons.

>Then there's the external drag and area issues. As long as
>you're not hauling around GAU-8 installs, the weight isn't that extreme.

A thousand pounds is a thousand pounds.

>And especially when you consider the weight per shot (a half-dozen 20mm
>bursts versus even one or two missiles) is pretty darned reasonable.

>> If you think that's the case, _you_ pay for integration, installation,
>> maintenance and training.
>>
>> It adds up to a pretty decent chunk of change.
>
>Not compared to keeping even *more* missiles in the inventory,

Which weapons actually get the kills?

>and the
>increased inventory of very expensive hardware to keep checking them and
>making them work.

And you don't think there's a significant overhead in keeping aircraft
guns maintained, reliable, boresighted, and (crucially) their crews
trained in their use?

>Even something as simple as an AIM-9 takes a boatload
>of work to keep functional, whether you fire them or not.

So does a M61.

>And when you
>*do* fire them in practice, you're burning off, in one shot, most of the
>lifetime cost of a small gun system...

Does the "lifetime cost" of a gun system include training? Or are the
pilots supposed to just pick it up as they go?





--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Chuck Johnson
January 2nd 04, 03:07 AM
(Tony Williams) wrote in
m:

> Greg Hennessy > wrote in message
> >...
>> On Fri, 05 Dec 2003 07:45:39 GMT, Chad Irby > wrote:
>>
>>
>> >> Whats the avarage gun burst time in a dogfight...
>> >
>> >Whatever it is, you're going to have to hold the trigger down for
>> >over three times that to get the same amount of fire downrange.
>>
>> Given the that the designer of the mig-29 is on record as saying that
>> he should have halved the number of rounds carried for its gsh-30L.
>> Tony Williams has a table on his website which details why a single
>> barrelled cannon will get there 1st with the mostest when compared to
>> a gatling.
>
> This is from 'Flying Guns: the Modern Era' by Emmanuel Gustin and
> myself, due to be published in March next year:
>
> "There are three competing philosophies when it comes to gun design
> for fighter aircraft. One is the US rotary; fast-firing but (to date)
> only 20 mm in calibre, and a very bulky system. The second is the West
> European preference for a 27 – 30 mm revolver cannon; no lighter,
> but slimmer and hard-hitting. The third is represented by the Russian
> GSh 301; a minimalist gun but with an equally hard-hitting
> performance. The twin-barrel GSh-30 also deserves mention, even though
> it has not been used in fighter aircraft. It weighs about the same as
> the western guns at 105 kg, but fires powerful 30 mm ammunition at up
> to 3,000 rpm.
>
> The merits of the 27 mm BK 27 revolver as opposed to the M61A1 can be
> clearly demonstrated. In the first 0.5 seconds of firing, the M61
> fires 18 rounds massing 1.8 kg in total weight of projectiles, the BK
> 27 fires 14 rounds weighing 3.7 kg. In the first full second, the M61
> fires 68 rounds weighing 6.9 kg, the BK 27 fires 28 rounds weighing
> 7.4 kg. In weight of fire, as well as the destructiveness of the
> individual projectiles, the Mauser clearly has an advantage, albeit
> one that the faster-accelerating M61A2 reduces somewhat. This is
> significant in that dogfights frequently permit only the briefest of
> firing opportunities, and although a skilled pilot anticipating a
> firing opportunity can 'spin up' a rotary in advance, such notice
> cannot always be guaranteed.
>
> The Mauser projectiles are also relatively heavier, resulting in a
> sectional density (SD) of .507 compared to .363 for the 20 mm, which
> means they will retain their initial velocity out to a greater range.
> The 30 mm GSh-301 offers similar performance to the BK 27 with about
> half the weight. On paper, this is an impressive fighter gun, although
> its maintenance requirements have been criticised. The choice of a
> heavy projectile (with an SD of .616) at a moderate velocity for the
> Russian 30 mm guns implies that ground attack has a higher priority
> than aerial combat in Russian thinking.
>
> The ideal gun for aerial combat will of course combine the best of all
> worlds: a high rate of fire, instantly achieved; a high muzzle
> velocity to minimise flight time; and projectiles large enough to
> inflict serious damage with each hit (requiring a calibre in the 25
> – 30 mm range). The optimum weapon among those currently developed
> may well be the new GIAT 30M791 revolver, although its weight means
> that two GSh 301s (or a GSh-30) could be carried instead, with a
> higher rate of fire. If the Russian guns' 30 x 165 ammunition were
> loaded with lighter projectiles for a higher muzzle velocity, its
> aerial combat capabilities would be improved, at the cost of some loss
> of ground attack effectiveness."
>
> Tony Williams
> Military gun and ammunition website: http://www.quarry.nildram.co.uk
> Discussion forum at: http://forums.delphiforums.com/autogun/messages/


Careful! don't praise the GIAT gun--Al Minard is going to **** his pants
again.

Matt Clonfero
January 4th 04, 10:41 PM
In article >, Paul J. Adam
> wrote:

>>Large dispersion from long slant range by crews who hadn't strafed since the
>>F-15E school house. That isn't the only reason, but it goes a long way
>>towards understanding why the strafe passes didn't work so well.
>
>Which is one of the reasons I'm not convinced that "a gun on every
>aircraft because we might need it for CAS" is a compelling argument.

Let's be fair, this was an aircraft that grew out of a program with the
slogan "Not a pound for air to ground". If you're building a multirole
aircraft from the start (and, let's face it, what isn't these days -
stand fast the F-22 as originally intended), you have to give
consideration to the face that the pilots might actually have to
influence the ground directly.

Aetherem Vincere
Matt
--
To err is human
To forgive is not
Air Force Policy

Matt Clonfero
January 4th 04, 10:44 PM
In article >, Chad Irby
> wrote:

>> >But since several people have pointed out other good reasons to have
>> >guns on fighters, and since you haven't come up with a good reason to
>> >*not* have one (one more missile or a minute's worth of fuel aren't very
>> >good reasons at all),
>>
>> Shame that you give up a lot more than that even for a 20mm
>> installation.
>
>Not really. Fuel is heavy as hell,

Well, only because you carry an awful lot of it. It's got a specific
density less than one, so it's a fair assumption that replacing a gun
installation with a fuel tank saves you weight - even if you assume that
50% of the volume of a gun installation is free air.

>> >the only thing left is to think about cost, and
>> >since guns for planes are a very small amount of the final sticker price
>> >of a modern plane...
>>
>> If you think that's the case, _you_ pay for integration, installation,
>> maintenance and training.
>>
>> It adds up to a pretty decent chunk of change.
>
>Not compared to keeping even *more* missiles in the inventory, and the
>increased inventory of very expensive hardware to keep checking them and
>making them work.

Actually, no. It's the fact that a gun adds a completely different
support line than "more of the same" missiles which drives the whole
life cost up.

Aetherem Vincere
Matt
--
To err is human
To forgive is not
Air Force Policy

Chad Irby
January 5th 04, 07:42 PM
In article >,
Matt Clonfero ]> wrote:

> In article >, Chad Irby
> > wrote:
>
> >> >But since several people have pointed out other good reasons to have
> >> >guns on fighters, and since you haven't come up with a good reason to
> >> >*not* have one (one more missile or a minute's worth of fuel aren't very
> >> >good reasons at all),
> >>
> >> Shame that you give up a lot more than that even for a 20mm
> >> installation.
> >
> >Not really. Fuel is heavy as hell,
>
> Well, only because you carry an awful lot of it. It's got a specific
> density less than one, so it's a fair assumption that replacing a gun
> installation with a fuel tank saves you weight - even if you assume that
> 50% of the volume of a gun installation is free air.

But compared to the amount of fuel you get, it's not a massive savings
by any stretch. You're also forgetting that fuel tanks weigh a *lot*,
not to mention their associated piping and pumping systems.

> It's the fact that a gun adds a completely different
> support line than "more of the same" missiles which drives the whole
> life cost up.

Not really. Missiles are *bloody* expensive to buy, store, maintain,
and use. Guns are cheap in comparison. A gun and a few hundred
thousand rounds of ammunition are less than the price of a couple of
plane's worth of missiles, and that's before you add in maintenance
costs.

--
cirby at cfl.rr.com

Remember: Objects in rearview mirror may be hallucinations.
Slam on brakes accordingly.

Mary Shafer
January 6th 04, 09:41 PM
On Fri, 12 Dec 2003 16:59:45 GMT, Ed Rasimus >
wrote:

> On Fri, 12 Dec 2003 08:15:44 -0800, Mary Shafer >
> wrote:
>
> >On Wed, 10 Dec 2003 22:36:54 +0000, "Paul J. Adam"
> > wrote:
> >
> >> In message >, Chad Irby
> >> > writes
>
> Mary adds some info and makes some big errors:

> >They were back at base. Bomber and attack and SEAD F-4Es only have
> >guns to defend themselves.
>
> Absolutely incorrect! All, repeat ALL F-4s always carried Sparrows. We
> didn't always have room for AIM-9s, but I never saw a combat sortie
> flown by an F-4 when I was there without Sparrows.

I have spent the time since you posted this trying to figure out where
I got the idea that they left the Sparrows at home when they went out
with bombs. I'd have sworn I read it somewhere, but I can't find it
now. Either it was a) another airplane, b) a total misunderstanding,
or c) a work of fiction I can't find now.

Whatever. As you say, it's not true.

> >Fewer than half the USAF F-4 were fighters with AAM. Since the
> >non-fighter F-4s would have been carrying their ordnance during the
> >inbound half of the flight and only been able to get into the fur ball
> >outgoing, I'd say guns were under-represented in kills. This probably
> >proves that the escort F-4s had more chances at MiGs than the
> >home-going non-fighters.
>
> The reason that A/A loaded F-4s got more kills is more subtle. It has
> to do with the politics of "ace-building" between the USN and USAF and
> the mis-guided over-classification of TEABALL. See Michel's Clashes or
> Thompson's "To Hanoi and Back".

I read both those and remembered the discussion just well enough to
know that I couldn't produce a coherent version of it here, so I just
skipped it entirely. I remember Chuck de Bellevue (is that right? I
have a terrible memory for names) talking about the ace-building
competition and one of the USN guys grousing about it.

I still think that having bombing a target as one's mission on a
sortie will incline the person to press on toward the target, rather
than jettisoning the bombs to close on an enemy airplane. After all,
that's letting the enemy pilot succeed in keeping you from bombing
your target. It's not as spectacular as blowing your airplane out of
the sky, but it's just as effective, at least for that one mission.
Of course, it wouldn't be just F-4s. The F-105s, for example, would
be in the same situation.

> Escorts didn't even get many shots as they were often used to provide
> blocking or herding of MiGs to direct them to a kill zone where the
> 555th was being vectored on a discrete frequency to do the shooting.

Since the NVAF used ground controllers heavily, did they monitor all
the frequencies? I know it's too much for pilots to manage, but a
ground facility should have a little more monitoring capability.

Is the 555th now at Nellis flying the A-10 or is that the 5555th? Or
should I say "was" instead? The numbers seem to be remarkably
unstable considering.

Thanks for the corrections, Ed. I dunno where I got the wrong ideas
from, but I have, I hope, extirpated them.

Mary


--
Mary Shafer Retired aerospace research engineer

Paul J. Adam
January 6th 04, 10:52 PM
In message >, Mary Shafer
> writes
>Since the NVAF used ground controllers heavily, did they monitor all
>the frequencies? I know it's too much for pilots to manage, but a
>ground facility should have a little more monitoring capability.

Others (Ed particularly but others too) will have better information,
but falling back on "Clashes" there was a SIGINT centre called 'Teaball'
which did just this: the trouble was getting its messages relayed
through often-flaky radio links and acted upon in a timely manner.

Having a ground-based centre intercept signals, translate them,
correlate them and confirm them, and then get warning to the relevant
aircraft is a non-trivial task even when everyone is amply supplied with
working radios and free frequencies and you've got a complete and
accurate air picture.

Uncertainty over exactly who is where increases the problems. Add in
"protect the source" constraints to hide the fact that you're
successfully eavesdropping from enemy intelligence, and it gets very
tricky indeed. And having busy pilots get vague warnings from "who he?"
doesn't help when they believe they have more immediate threats to their
survival.


Eavesdropping isn't trivial but it's doable. Turning that into immediate
tactical information and communicating it in a usefully timely manner,
is a still a challenge today.

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Kevin Brooks
January 7th 04, 05:45 AM
"Paul J. Adam" > wrote in message
...
> In message >, Mary Shafer
> > writes
> >Since the NVAF used ground controllers heavily, did they monitor all
> >the frequencies? I know it's too much for pilots to manage, but a
> >ground facility should have a little more monitoring capability.
>
> Others (Ed particularly but others too) will have better information,
> but falling back on "Clashes" there was a SIGINT centre called 'Teaball'
> which did just this: the trouble was getting its messages relayed
> through often-flaky radio links and acted upon in a timely manner.

I thought there was an EC-121 usually performing this kind of work?

Brooks

>
> Having a ground-based centre intercept signals, translate them,
> correlate them and confirm them, and then get warning to the relevant
> aircraft is a non-trivial task even when everyone is amply supplied with
> working radios and free frequencies and you've got a complete and
> accurate air picture.
>
> Uncertainty over exactly who is where increases the problems. Add in
> "protect the source" constraints to hide the fact that you're
> successfully eavesdropping from enemy intelligence, and it gets very
> tricky indeed. And having busy pilots get vague warnings from "who he?"
> doesn't help when they believe they have more immediate threats to their
> survival.
>
>
> Eavesdropping isn't trivial but it's doable. Turning that into immediate
> tactical information and communicating it in a usefully timely manner,
> is a still a challenge today.
>
> --
> When you have to kill a man, it costs nothing to be polite.
> W S Churchill
>
> Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Paul J. Adam
January 7th 04, 06:56 PM
In message >, Kevin Brooks
> writes
>"Paul J. Adam" > wrote in message
...
>> Others (Ed particularly but others too) will have better information,
>> but falling back on "Clashes" there was a SIGINT centre called 'Teaball'
>> which did just this: the trouble was getting its messages relayed
>> through often-flaky radio links and acted upon in a timely manner.
>
>I thought there was an EC-121 usually performing this kind of work?

Teaball's info was radioed to a relay aircraft, codenamed Luzon (usually
a KC-135), but the radios on Luzon were flaky and prone to interference
and _that_ was the reliability problem.

Also, there was a complex structure of "who controlled what units when"
which varied by mission and depended on "whose radios were working": Red
Crown, Disco, College Eye and Teaball all could be in charge at
different times in a mission.

Sometimes it seems a miracle any of the pilots involved survived.

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Kevin Brooks
January 7th 04, 09:24 PM
"Paul J. Adam" > wrote in message
...
> In message >, Kevin Brooks
> > writes
> >"Paul J. Adam" > wrote in message
> ...
> >> Others (Ed particularly but others too) will have better information,
> >> but falling back on "Clashes" there was a SIGINT centre called
'Teaball'
> >> which did just this: the trouble was getting its messages relayed
> >> through often-flaky radio links and acted upon in a timely manner.
> >
> >I thought there was an EC-121 usually performing this kind of work?
>
> Teaball's info was radioed to a relay aircraft, codenamed Luzon (usually
> a KC-135), but the radios on Luzon were flaky and prone to interference
> and _that_ was the reliability problem.
>
> Also, there was a complex structure of "who controlled what units when"
> which varied by mission and depended on "whose radios were working": Red
> Crown, Disco, College Eye and Teaball all could be in charge at
> different times in a mission.
>
> Sometimes it seems a miracle any of the pilots involved survived.

Based upon a quick perusal, it appears what you are presenting is true, but
not the "whole truth", so to speak. The EC-121's apparently were indeed
performing at least some of the same kind work in support of the
inbound/outbound fighters--FAS mentions that the EC's of the 193rd TEWS
(PaANG) apparently did also have some interception gear onboard, and another
source indicates linguists were indeed included in the crew loads when the
EC's were operating over SEA.

Brooks

Paul J. Adam
January 7th 04, 09:39 PM
In message >, Kevin Brooks
> writes
>"Paul J. Adam" > wrote in message
...
>> Teaball's info was radioed to a relay aircraft, codenamed Luzon (usually
>> a KC-135), but the radios on Luzon were flaky and prone to interference
>> and _that_ was the reliability problem.
>>
>> Also, there was a complex structure of "who controlled what units when"
>> which varied by mission and depended on "whose radios were working": Red
>> Crown, Disco, College Eye and Teaball all could be in charge at
>> different times in a mission.
>>
>> Sometimes it seems a miracle any of the pilots involved survived.
>
>Based upon a quick perusal, it appears what you are presenting is true, but
>not the "whole truth", so to speak. The EC-121's apparently were indeed
>performing at least some of the same kind work in support of the
>inbound/outbound fighters--FAS mentions that the EC's of the 193rd TEWS
>(PaANG) apparently did also have some interception gear onboard, and another
>source indicates linguists were indeed included in the crew loads when the
>EC's were operating over SEA.

Quoting Michel directly,

"There was considerable SIGINT and other information about the MiGs
available from a variety of sources, but this information was jealously
guarded by the American agencies that collected it: just because
American aircrews were being shot down for lack of this information they
saw no reason to release it."

Teaball was established at Nakhom Phanom in late July 1972 to
co-ordinate the reception, analysis and dissemination of that
information. Direct dissemination just didn't seem to happen, at least
according to Michel.

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Kevin Brooks
January 8th 04, 12:55 AM
"Paul J. Adam" > wrote in message
...
> In message >, Kevin Brooks
> > writes
> >"Paul J. Adam" > wrote in message
> ...
> >> Teaball's info was radioed to a relay aircraft, codenamed Luzon
(usually
> >> a KC-135), but the radios on Luzon were flaky and prone to interference
> >> and _that_ was the reliability problem.
> >>
> >> Also, there was a complex structure of "who controlled what units when"
> >> which varied by mission and depended on "whose radios were working":
Red
> >> Crown, Disco, College Eye and Teaball all could be in charge at
> >> different times in a mission.
> >>
> >> Sometimes it seems a miracle any of the pilots involved survived.
> >
> >Based upon a quick perusal, it appears what you are presenting is true,
but
> >not the "whole truth", so to speak. The EC-121's apparently were indeed
> >performing at least some of the same kind work in support of the
> >inbound/outbound fighters--FAS mentions that the EC's of the 193rd TEWS
> >(PaANG) apparently did also have some interception gear onboard, and
another
> >source indicates linguists were indeed included in the crew loads when
the
> >EC's were operating over SEA.
>
> Quoting Michel directly,
>
> "There was considerable SIGINT and other information about the MiGs
> available from a variety of sources, but this information was jealously
> guarded by the American agencies that collected it: just because
> American aircrews were being shot down for lack of this information they
> saw no reason to release it."
>
> Teaball was established at Nakhom Phanom in late July 1972 to
> co-ordinate the reception, analysis and dissemination of that
> information. Direct dissemination just didn't seem to happen, at least
> according to Michel.

OK, I was apparently confusing the situation with Red Crown. You might find
an article by a USAF intel/EWO type of interest; it indicates Red Crown was
getting its info from EA-3B's and EC-121M's, and then forwarding that info
to the strike packages (though their info may have been only available to
the USN packages). Red Crown was also apparently exchanging info with
Teaball, but did not require Teaball to originate warnings/directions. I am
wondering how accurate the assertion that Teaball info had to come from
Teabll via that relay RC-135 was, since that source also indicates Teaball
was exchanging info with USAF AWACS EC-121's--we know that these early
generation AWACS did also directly control intercepts that resulted in Migs
being downed (first occured in July '67).

Brooks

http://www.dodccrp.org/6thICCRTS/Cd/Tracks/Papers/Track7/012_tr7.pdf

Brooks

>
> --
> When you have to kill a man, it costs nothing to be polite.
> W S Churchill
>
> Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Paul J. Adam
January 8th 04, 11:15 PM
In message >, Kevin Brooks
> writes
>"Paul J. Adam" > wrote in message
...
>> Quoting Michel directly,

>OK, I was apparently confusing the situation with Red Crown.

Hey, Michel is good but not perfect. I daresay he's close to the facts,
but I would never claim that Teaball was the one and only SIGINT
distributor - I've read a book, others were _there_. I'm quoting a
participant's book, not Holy Writ.

(Hopefully Ed will offer experience or Guy study, they're the SMEs here)

>You might find
>an article by a USAF intel/EWO type of interest; it indicates Red Crown was
>getting its info from EA-3B's and EC-121M's, and then forwarding that info
>to the strike packages (though their info may have been only available to
>the USN packages).

I did indeed find it of interest - thanks.

>Red Crown was also apparently exchanging info with
>Teaball, but did not require Teaball to originate warnings/directions. I am
>wondering how accurate the assertion that Teaball info had to come from
>Teabll via that relay RC-135 was, since that source also indicates Teaball
>was exchanging info with USAF AWACS EC-121's--we know that these early
>generation AWACS did also directly control intercepts that resulted in Migs
>being downed (first occured in July '67).

I think there was then a significant difference between "AEW or picket
ships controlling intercepts" and "compromising the unbelievable
possibility that the US could both monitor radio frequencies and find
someone who could interpret Vietnamese".

From a very distant perspective, SIGINT folks seem to get jumpy about
their results being used tactically, sometimes with good reason: if
you've got a reliable way to eavesdrop on the enemy and you believe it's
of significant strategic value, is it worth compromising it for a
short-term tactical advantage? Sometimes this approach is justified:
perhaps other times it may be reflex rather than reason.



--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Kevin Brooks
January 9th 04, 01:30 AM
"Paul J. Adam" > wrote in message
...
> In message >, Kevin Brooks
> > writes
> >"Paul J. Adam" > wrote in message
> ...
> >> Quoting Michel directly,
>
> >OK, I was apparently confusing the situation with Red Crown.
>
> Hey, Michel is good but not perfect. I daresay he's close to the facts,
> but I would never claim that Teaball was the one and only SIGINT
> distributor - I've read a book, others were _there_. I'm quoting a
> participant's book, not Holy Writ.
>
> (Hopefully Ed will offer experience or Guy study, they're the SMEs here)
>
> >You might find
> >an article by a USAF intel/EWO type of interest; it indicates Red Crown
was
> >getting its info from EA-3B's and EC-121M's, and then forwarding that
info
> >to the strike packages (though their info may have been only available to
> >the USN packages).
>
> I did indeed find it of interest - thanks.
>
> >Red Crown was also apparently exchanging info with
> >Teaball, but did not require Teaball to originate warnings/directions. I
am
> >wondering how accurate the assertion that Teaball info had to come from
> >Teabll via that relay RC-135 was, since that source also indicates
Teaball
> >was exchanging info with USAF AWACS EC-121's--we know that these early
> >generation AWACS did also directly control intercepts that resulted in
Migs
> >being downed (first occured in July '67).
>
> I think there was then a significant difference between "AEW or picket
> ships controlling intercepts" and "compromising the unbelievable
> possibility that the US could both monitor radio frequencies and find
> someone who could interpret Vietnamese".
>
> From a very distant perspective, SIGINT folks seem to get jumpy about
> their results being used tactically, sometimes with good reason: if
> you've got a reliable way to eavesdrop on the enemy and you believe it's
> of significant strategic value, is it worth compromising it for a
> short-term tactical advantage? Sometimes this approach is justified:
> perhaps other times it may be reflex rather than reason.

My reasoning was more in the line of Teaball very possibly cuing the EC-121
(which was indeed operating as a primitive AWACS, since they were not only
observing with their radar but also directing the fighters) to likely
threats before they popped into the EC's range.

Brooks

>
>
>
> --
> When you have to kill a man, it costs nothing to be polite.
> W S Churchill
>
> Paul J. Adam MainBox<at>jrwlynch[dot]demon{dot}co(.)uk

Chris Manteuffel
January 9th 04, 04:41 AM
"Paul J. Adam" > wrote in message >...
> From a very distant perspective, SIGINT folks seem to get jumpy about
> their results being used tactically, sometimes with good reason: if
> you've got a reliable way to eavesdrop on the enemy and you believe it's
> of significant strategic value, is it worth compromising it for a
> short-term tactical advantage? Sometimes this approach is justified:
> perhaps other times it may be reflex rather than reason.


Intriguinly, the USAF seemed to have much less trouble utilizing this
sort of information during the Korean war then during the Vietnam war.
Wonder what the difference was?

from: http://www.nsa.gov/korea/papers/sigint_background_korean_war.htm

"Air Force Support
The Air Force Security Service continued support to the air during the
period of stalemate. The AFSS also adopted a number of innovations to
provide new kinds of support for the air war.

A good example of AFSS support occurred in June 1951. Analysts at an
Air Force intercept site were able to accurately predict a North
Korean bombing raid on UN-held islands. This intelligence enabled the
commanding general of the U.S. 5th Air Force to ensure that the raid
was met with ample defense. one YAK and two IL-10 bombers were downed,
several others were damaged, and two MiG fighters were also damaged.
It is believed that the commander of the 5th Air Force may have been
aware of the impending raid before the commander of the North Korean
attacking unit had received his orders.

In late April 1951, AFSS personnel intercepted messages that indicated
aircraft of the 4th Fighter Squadron were being boxed by Soviet
aircraft. The quick relay of this information to the flight enabled it
to avoid the trap. This kind of warning continued through the war.

Soviet Bloc Air defense doctrine called for control of local fighter
pilots by their tower. These ground control intercept (GCI)
communications were vulnerable to eavesdroppers.

At various periods during the air campaign, COMINT units from the AFSS
were intercepting North Korean, Chinese, or Soviet instructions to
their pilots. These were disguised as "radar plots" and forwarded in
near-real time to U.S. pilots operating over North Korean territory.
When this source was exploited, the U.S. "kill ratio" over MiGs was
quite high; during periods of nonexploitation, the ratio was much
lower.

Monitoring of North Korean, Chinese, and Soviet air communications was
done from listening posts in South Korea, but there were hearability
problems for certain areas at different times of the day. To solve
these problems, in mid-1951 the AFSS established an intercept site on
Paengyong-do - commonly known as "P-Y-do" by Americans - a UN-held
island close to the west coast of North Korea. Since this was close to
enemy territory, the security regulations had to be relaxed, and 5th
Air Force had to provide special evacuation service. Eventually the
Americans abandoned their effort on the island.

Once this activity on P-Y-do proved successful, in the spring of 1952
a similar operation was undertaken on Cho-do, a UN-held island off the
east coast of Korea, near Wonson. Lieutenant Delmar Lang organized
teams of linguists and personnel from the Tactical Air Control Center
to provide near-real-time information to pilots operating over North
Korea. Del Lang, by the way, used this operation as a model for
similar activity during the Vietnam War.

Security Service also conducted airborne collection operations. In
addition to support of the war effort, these flights were useful in
testing intercept equipment and general concepts of operations."

Chris Manteuffel

Tony Williams
January 12th 04, 07:37 AM
Matt Clonfero ]> wrote in message >...
> In article >, Chad Irby
> > wrote:
>
> >> Well, only because you carry an awful lot of it. It's got a specific
> >> density less than one, so it's a fair assumption that replacing a gun
> >> installation with a fuel tank saves you weight - even if you assume that
> >> 50% of the volume of a gun installation is free air.
> >
> >But compared to the amount of fuel you get, it's not a massive savings
> >by any stretch. You're also forgetting that fuel tanks weigh a *lot*,
> >not to mention their associated piping and pumping systems.
>
> Sure - but making an existing tank bigger has a very very marginal
> increase in tank weight; and no additional cost in piping and pumping.
>
> >> It's the fact that a gun adds a completely different
> >> support line than "more of the same" missiles which drives the whole
> >> life cost up.
> >
> >Not really. Missiles are *bloody* expensive to buy, store, maintain,
> >and use. Guns are cheap in comparison. A gun and a few hundred
> >thousand rounds of ammunition are less than the price of a couple of
> >plane's worth of missiles, and that's before you add in maintenance
> >costs.
>
> Yes, but by eliminating the guns, you eliminate the gun, the ammunition,
> the three lines of servicing, a complete trade of ground crew, and both
> the servicing and pilot's training for gun maintenance and usage.

Yep. And if you eliminate the missiles and the plane's radar too,
you'll save most of the cost of the weapon system!

Military aircraft are extremely expensive to purchase, maintain and
train for. It makes no sense to save a tiny percentage of the
whole-life costs of acquiring an aircraft system if by doing so you
remove a useful, if secondary, military capability.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/

Matt Clonfero
January 21st 04, 11:43 PM
In article >, Tony
Williams > wrote:

>Yep. And if you eliminate the missiles and the plane's radar too,
>you'll save most of the cost of the weapon system!
>
>Military aircraft are extremely expensive to purchase, maintain and
>train for. It makes no sense to save a tiny percentage of the
>whole-life costs of acquiring an aircraft system if by doing so you
>remove a useful, if secondary, military capability.

Oh, I quite agree with your point - the whole life cost saving of
deleting the gun is negligible when compared with the WLC of the whole
system. My issue is with people who say that you don't save much, in
absolute terms - because you do.

Aetherem Vincere
Matt
--
To err is human
To forgive is not
Air Force Policy

WaltBJ
January 24th 04, 06:24 PM
This parsing of the snap-shot situation concluding a half second
advantage in fire weight - even a full second - is rather disingenuous
in that a skilled pilot will see the possibility of a snap shot
developing and be already firing before the non-tracked target passes
through the zone of fire. I well remember that gun camera film of
Korean War F86 pilot Major Pete Fernandez' ninety degree shot on a MiG
15 - he was firing before the MiG entered the pcture - hits plastered
the MiG and it went out of the frame smoking badly. IN WW2 one of the
'experten' jumped Sailor Malan - Malan broke into his attacker and
hosed him on a quartering head-on shot. The attacker was wounded badly
and had to break for home. His name doesn't come to me at the moment.
I maintain the M61 can hold its own in any situation. Situation
awareness is the key. Without that the impulsive squeeze of the
trigger as an aircraft passes swiftly in front of you is generally
futile as the rounds will pass behind him.
Walt BJ

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