On 25 Feb 2004 23:38:19 -0800, (John Gilbert) wrote:

I have not been able to find any information on the Pegase 101A polar
online. Does anyone have one online?
The published references I have found (sailplanedirectory.com, for
instance) quote a L/D of 41:1, and a sink rate, but with no
corresponding airspeeds. Anyone know what they are? How does it
compare to ASW20 in performance?

Pegase 101a
===========
Maximum L/D: 41 @ 57 kts
Minimum sink: 0.60 m/s (120 fpm) @ 43 kts

I extracted the Min.sink numbers from the flight manual's dry polar,
but think the curve may be for the 101P (fixed gear) as the max L/D
from the curve is 34.7:1 @ 61 kts. The max L/D quoted above (41 @ 57
kts) is from the Sailplane Directory - our club briefing notes for the
Pegase 90 mention 41 @ 55 kts.

Looking at the wet polar (Pegase 101a at 728 lbs, no tiplets) I get:

Maximum L/D: 38 @ 72 kts
Minimum sink: 0.72 m/s (142 fpm) @ 60 kts

ASW-20
=======
The Saiplane directory quotes:

Maximum L/D: 43 @ 65 kts
Minimum sink: 0.59 m/s (116 fpm) - no speed given

Dick Johnson measured the following for the ASW-20 at 759 lbs weight:

Maximum L/D: 41.7 @ 57 kts (same for +0, -6, -9 flap settings)
Minimum sink: 0.56 m/s (110 fpm) @ 40 kts (+8 flaps)

References
==========
You can find Dick Johnson's test reports at
http://www.ssa.org/Magazines/Johnson.asp

I've spent the last two soaring seasons flying a Pegase 90 and have
just bought an ASW-20, so I should be in a better position to make the
comparison in 2-3 months time, weather permitting.

HTH

--
martin@ : Martin Gregorie
gregorie : Harlow, UK
demon :
co : Zappa fan & glider pilot
uk :