Discus 2
Nilton O. Renno
Thanks,
--Nilton
Jens Henkner
> Is the Discus 2 polar available (either theoretical or measured)?
>
Theorectivally better than all the other standard ships :-).
Sorry couldn't resist.
Nothing known up 'til now (anything else than advertisements)
Regards Jens
--
Lehrstuhl fuer Fluidmechanik (FLM) | Tel.: +89-289-16122
Technische Universitaet Muenchen | Fax.: +89-289-16151
Boltzmannstr. 15 85747 Garching | J.He...@flm.mw.tum.de
http://www.flm.mw.tum.de/~henky
Thomas Knauff
Nilton O. Renno wrote:
> Is the Discus 2 polar available (either theoretical or measured)?
It is Schempp-Hirth's policy not to make performance claims. A glider's
"performance" polar tells little about the overall performance. A good
example is the present version of the Discus whose contest record is
unparalleld for more than a decade. If you were to purchase only on a
measured L/D, you would buy another brand of glider and then have a
glider that was not as good performaing as the Discus.
The Discus 2 won the first three contest it entered.
We are a Schempp-Hirth representative.
--
Thomas Knauff
Knauff & Grove Soaring Supplies
Schempp-Hirth Sailplanes, Keystone Gliderport
Julian, Pa 16844 USA
Phone (814) 355 2483
Fax (814) 355 2633
www.glider.com/knauff
Phill Magnuson
> "performance" polar tells little about the overall performance.
What means should be used to measure "overall performance"?
Contest results would seem to be a measure of both the pilot and plane.
What available tool is better than the performance polor for measuring just
the performance of the plane?
mgmz...@cmw.ca
In article <364C3C78...@earthlink.net>,
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Roelant van der Bos
> > "performance" polar tells little about the overall performance.
>
>
> Contest results would seem to be a measure of both the pilot and plane.
>
> What available tool is better than the performance polor for measuring just
> the performance of the plane?
If you mean the L/D - ratio as the main indicator for the performance of a ship
you are wrong imho .If you have a high L/D ship that drops like a brick after
it exceeds 130 km/h it won't be very competitive in a championship. Same thing
if you can't fly as slow as others to thermal, cause you fly in greater
circles. You always have to make compromices when designing an aircraft, and
different manufacturers choose different priorities, so there is no perfect way
to test the difference between ships, because some do better when you have to
evade cows in the air, others better when there's barely lift at all.
You could say that championship results are a good measure for aircraft, but
that is also influenced by pilot, weather and luck. Of course, if you've got a
ship that's better suited for the conditions at that time, you've got a bigger
chance to win, but I think the differences nowadays aren't that big that it
could completely determine the outcome, pilot decisions influence it at least
the same.
You can't compare aircraft perfectly, but in time you can get an idea of what
ship is better than the other as all circumstances and other factors occur. And
then you can say that the winner WAS the better ship, but is now losing because
newer and better ships are winning .......
Roelant van der
Bos
Martin Usher
useful data from people who make or sell scale models. These models are
quite large - typically third or quarter scale with occasional half scale
monsters - and are invariably faithful copies of the originals.
The main importers of large scale models in the US is "Sailplanes
Unlimited Ltd", www.sailplanes.com.
Sergio Capoferri
be a bit better than the ls8 in weak thermals.
Good Flights
Sergio
Jens Henkner wrote:
> Nilton O. Renno <re...@soar.atmo.arizona.edu> wrote:
>
> > Is the Discus 2 polar available (either theoretical or measured)?
> >
>