Perfect electro-magnetic storm

Larry

A current program using a F-5 has demonstrated modeling of airframe
that will reduce sonic booms.

This has been published a number of places.

Big John



On Wed, 29 Oct 2003 16:20:30 GMT, Larry Dighera
wrote:

On Wed, 29 Oct 2003 10:02:08 -0600, "Montblack"
wrote in Message-Id:
:

While the usual inanity contained in articles posted by Montblack are
easily dismissed, this caught my eye:

"Styled by the laws of nature.............Concorde"


It seems that the next generation of supersonic airliners may be
permitted to fly over the US (to the west coast where I reside):



http://www.discoverychannel.co.uk/ne...rticle01.shtml
The shape of jets to come

AS TICKETS for Concorde's final flight go on sale this week, an
American aerospace company has demonstrated a way to modify a
supersonic jet to dramatically reduce its sonic boom. The work
could pave the way for a new generation of business jets quiet
enough to fly at supersonic speed over populated areas.

Sonic booms are one of the biggest drawbacks of supersonic flight.
They are the sharp thunderclaps caused by shock waves created at
the nose and tail of an aircraft meeting as they travel to the
ground. Where the shock waves overlap they reinforce each other,
creating the boom. Concorde's boom is so loud that it is forbidden
from flying at supersonic speeds over land.

In the 1970s, Richard Seebass and Albert George at Cornell
University in New York came up with a straightforward way to
counter the problem. They reasoned that a shock wave would be
weaker if it were spread out over a larger area. This could be
achieved by replacing a plane's sharp nose with a blunter shape
and redesigning parts of the wings, for example where the base of
the wing meets the fuselage, so that the angles between surfaces
do not change so sharply. The idea was to allow the shock waves to
form over larger areas of the aircraft's surface. Years of
computer modelling and wind tunnel tests have validated the
concept, but it had never been tried in flight.

Now the American aerospace company Northrop Grumman ...



http://www.newscientist.com/news/news.jsp?id=ns99993616
...
New chapter

A supersonic successor will be very different in design, Jackson
told New Scientist: "There will be such an interval before any
supersonic transport gets going again, that we'll start on a
separate chapter of air travel."

Bill Gunston, editor of Jane's Aero Engines and author of the book
Faster Than Sound, believes dramatic improvements in aerodynamics
over the last 30 years would now make it possible to build a much
far more efficient supersonic craft than Concorde. He says the
airplane's lift-to-drag ratio means it requires very powerful
engines and huge amounts of fuel.

"Any capable design outfit could design something vastly superior
to Concorde," Junston told New Scientist.
...


http://uk.news.yahoo.com/030929/12/e9q0q.html
Monday September 29, 04:00 PM

Curvy aircraft could silence sonic booms
By David L. Chandler

As tickets for Concorde's final flight go on sale this week, an
American aerospace company has demonstrated a way to modify a
supersonic jet to dramatically reduce its sonic boom.

The work could pave the way for a new generation of business jets
quiet enough to fly at supersonic speed over populated areas.

Sonic booms are one of the biggest drawbacks of supersonic flight.
They are the thunderclaps caused when shock waves created at the
nose and tail of an aircraft meet as they travel to the ground.
Where the shock waves overlap they reinforce each other, creating
the boom. Concorde's boom is so loud that the plane is forbidden
from flying at supersonic speeds over land.

In the 1970s, Richard Seebass and Albert George at Cornell
University in Ithaca, New York, came up with a straightforward way
to counter the problem. They reasoned that a shock wave would be
weaker if it were spread out over a larger area.

This could be achieved by replacing a plane's sharp nose with a
blunter shape and redesigning parts of the wings, for example
where the base of the wing meets the fuselage, so that the angles
between surfaces do not change so abruptly.

The idea was to force the shock waves to fan out more rapidly as
they move away from these curves, spreading out their energy.
Years of computer modelling and wind tunnel tests have validated
the concept, but it had never been tried in flight.

Now the American aerospace company Northrop Grumman has ...

Larry Dighera wrote:

It seems that the next generation of supersonic airliners may be
permitted to fly over the US (to the west coast where I reside):

They will if an American company operates the plane. According to most press
reports that I saw at the time Concorde was being developed, about the only
reason the ban on SST flight was passed through Congress was the fact that the
Concorde was European. This was an era in which laws such as safety regulations
were being heavily used in economic warfare by Congress.

George Patterson
You can dress a hog in a tuxedo, but he still wants to roll in the mud.

Roger Long wrote:

Actually, NPR was very balanced.

I suspect that there is a lot of disparity amongst the various NPR stations.
I listen to WNYU in this area, and it seems to me that the commentators who
tend to go off the deep end are local. I expect that those hours which NYU
devotes to New York politics are filled with other programs in other parts of
the country.

George Patterson
You can dress a hog in a tuxedo, but he still wants to roll in the mud.

"Roger Long" om wrote in
message ...
| Actually, NPR was very balanced. The flare is the largest in decades but
| they pointed out that the effects are difficult to predict. There is a
lot
| of unevenness in the cloud and other unpredictable effects. The stuff
that
| could really disrupt things might well miss us.

As the day has progressed they have toned down the hysteria considerably. As
for the rest of the media, the woo-woo crowd in Hollywood and New York has
become obsessed with decadence in corporate America. ROFL!

Hey, my transponder stopped transponding yesterday for about 40 mins while
passing between Richmond and Raleigh. I was whipped into a frenzy when
Center told me that RDU wasn't going to want to take me without a
Transponder and 400' ceilings. I was whipped up at that point. Went to
Raliegh approach and they could see me fine.

Does that count? :-)

Well, that flare is due here today. The news media are hysterical, talking
about the enormous danger to aircraft navigation systems. NPR has gone
absolutely ballistic. The general public should be whipped into a frenzy,
fearing that it will start raining airplanes any second.

"C J Campbell" wrote in message
...

"Roger Long" om wrote
in
message ...
| Last weeks solar flare was a non-event except for "a few aircraft
navigation
| systems" as NPR put it. The one that erupted this morning and will
reach
| earth Wednesday or Thursday is believed by astronomers to be possibly
the
| largest since the invention of the integrated circuit.
|

Well, that flare is due here today. The news media are hysterical, talking
about the enormous danger to aircraft navigation systems. NPR has gone
absolutely ballistic. The general public should be whipped into a frenzy,
fearing that it will start raining airplanes any second.

Of course, the 'fair and balanced media' (and I do not mean just FOX,
here),
will report tomorrow that nothing serious happened. Right? I mean, they do
admit when they are wrong, don't they?

OTOH, if something DOES happen, they'll blame Bush.

Larry Dighera writes:

It seems that the next generation of supersonic airliners may be
permitted to fly over the US (to the west coast where I reside):

The problem of sonic booms was always vastly exaggerated, anyway (just
like the problem of solar flares). I heard sonic booms all the time
when I was little, and it never bothered me. I could never figure out
what the big deal was.

--
Transpose hotmail and mxsmanic in my e-mail address to reach me directly.

On Wed, 29 Oct 2003 11:01:48 -0600, "Montblack"
wrote in Message-Id:
:

B. I stole that sig line from somebody's post - Dave, in the Three Concordes
thread.

The signature is worthy of plagiarizing. :-)

C. I'm going to have a beer - before noon, to celebrate being called inane
by LD.

I did not call YOU inane. I was referring to the often shallow
attempts at humor you routinely post. At least the signature line is
aviation related. Some folks like to read attempts at humor; I prefer
information.

D. Dismissed!! Oh well. At least you didn't *plonk* me - did you? Larry?
Hello....

While I completely understand readers taking responsibility for the
content they view in newsgroups; that is as it should be. Personally,
I find "head-in-the-sand" censorship to be as repugnant as any other
form of censorship. I take the good with along with the bad, so to
speak. C'est la vie. No?

"C J Campbell" wrote:
Well, that flare is due here today. The news media are hysterical,
talking about the enormous danger to aircraft navigation systems.
NPR has gone absolutely ballistic.

You must listen to a different NPR than I do. I've never heard them go
"absolutely ballistic" about anything, even 9/11.
--
Dan
C172RG at BFM

On Wed, 29 Oct 2003 11:03:12 -0600, Big John
wrote in Message-Id: :

A current program using a F-5 has demonstrated modeling of airframe
that will reduce sonic booms.

Thanks for the data-point. Have you got a URL?