LS-3/17m Johnson report

[Brad[_2_]]

Anyone know if the Johnson flight test for the 17m version of the LS-3
is available on the web?

Thanks,
Brad

[[email protected]]

Brad,
It is on the SSA website under "Soaring Magazine" and "Johnson
Reports...."
Thanks - Renny

On Nov 10, 8:51*pm, Brad > wrote:
> Anyone know if the Johnson flight test for the 17m version of the LS-3
> is available on the web?
>
> Thanks,
> Brad

[Brad[_2_]]

On Nov 10, 6:58*pm, wrote:
> Brad,
> It is on the SSA website under "Soaring Magazine" and "Johnson
> Reports...."
> Thanks - Renny
>
> On Nov 10, 8:51*pm, Brad > wrote:
>
>
>
> > Anyone know if the Johnson flight test for the 17m version of the LS-3
> > is available on the web?
>
> > Thanks,
> > Brad- Hide quoted text -
>
> - Show quoted text -

Thanks Renny,

Now I've discovered I forgot my password...............will give the
office a call tomorrow and get things straigtened out.

Brad

[ContestID67]

Here is the direct link. Note that you have to be a member to
download the file.

http://ssa.org/members/johnson/fileserve.asp?file=33-1980-06.pdf

[Bernie[_4_]]

It's archived here:

http://web.archive.org/web/20050206183811/http://www.ssa.org/Magazines/Johnson.asp

[Jim Archer]

At 03:18 12 November 2008, Bernie wrote:
>It's archived here:
>
>http://web.archive.org/web/20050206183811/http://www.ssa.org/Magazines/Johnson.asp
>

never mind the Johnson report, where is there one for sale? I want one!
"Growing out" of your LS cockpit? I'll trade you a Kestrel 17...
Though I do love the Kestrel.

[noel.wade]

On Nov 12, 8:15 am, Jim Archer > wrote:
> At 03:18 12 November 2008, Bernie wrote:
>
> >It's archived here:
>
> >http://web.archive.org/web/20050206183811/http://www.ssa.org/Magazine...
>
> never mind the Johnson report, where is there one for sale? I want one!
> "Growing out" of your LS cockpit? I'll trade you a Kestrel 17...
> Though I do love the Kestrel.

Jim -

I've flown an LS-4 and love it; but the LS-3/17 to me is a bit of an
odd duck. The tip extensions have no control surfaces and are fairly
thick/cambered. This restricts the ballast you can carry and the
speeds you can fly (especially when it comes to reflexed flap
settings). IIRC, the Johnson reports only showed an extra 3 - 4
points of L/D (from the original 39:1 or 40:1)...

Since you can't fly fast with the flaps reflexed and you can't carry
ballast, the wing-loading is going to be lower and your flaps will be
less-optimal and therefore IMHO the extended wingtips aren't going to
be much (if any) benefit - especially in strong conditions. I could
see them helping out on a light/"scratchy" day; but that's about it.

And for the record, I'm not knocking the base LS-3 or LS-3a design...
Of the pre-ASW-20 flapped ships, I think its one of the best.

Take care,

--Noel
(DG-300 driver, flapped-ship-dreamer)

[Mike[_8_]]

On Nov 12, 3:01*pm, "noel.wade" > wrote:
> On Nov 12, 8:15 am, Jim Archer > wrote:
>
> > At 03:18 12 November 2008, Bernie wrote:
>
> > >It's archived here:
>
> > >http://web.archive.org/web/20050206183811/http://www.ssa.org/Magazine....
>
> > never mind the Johnson report, where is there one for sale? *I want one!
> > "Growing out" of your LS cockpit? *I'll trade you a Kestrel 17...
> > Though I do love the Kestrel.
>
> Jim -
>
> I've flown an LS-4 and love it; but the LS-3/17 to me is a bit of an
> odd duck. *The tip extensions have no control surfaces and are fairly
> thick/cambered. *This restricts the ballast you can carry and the
> speeds you can fly (especially when it comes to reflexed flap
> settings). *IIRC, the Johnson reports only showed an extra 3 - 4
> points of L/D (from the original 39:1 or 40:1)...
>
> Since you can't fly fast with the flaps reflexed and you can't carry
> ballast, the wing-loading is going to be lower and your flaps will be
> less-optimal and therefore IMHO the extended wingtips aren't going to
> be much (if any) benefit - especially in strong conditions. *I could
> see them helping out on a light/"scratchy" day; but that's about it.
>
> And for the record, I'm not knocking the base LS-3 or LS-3a design...
> Of the pre-ASW-20 flapped ships, I think its one of the best.
>
> Take care,
>
> --Noel
> (DG-300 driver, flapped-ship-dreamer)

Pre ASW-20 flapped ship?

[noel.wade]

On Nov 12, 2:35*pm, Mike > wrote:

> Pre ASW-20 flapped ship?

Yeah - DG-200, LS-3, Mini-Nimbus, Mosquito, various HP's, Libelles,
etc.

(OK, if you want to get nit-picky, the "pre-ASW-20" comment isn't
strictly applicable to the DG-200 and LS-3, depending on how you count
flights of the prototypes and when they made it into true commercial
production and such... But you know what I mean: Sailplanes that
debuted before the ASW-20 had cemented its popularity and reputation
as the cream of the crop of its generation of 15m craft. But its much
shorter and simpler to just say "pre-ASW-20 flapped ship".)

--Noel