On 17 Jul 2004 23:50:41 -0700, (Rudy Allemann)
wrote:

Martin Gregorie wrote in message . ..
On 15 Jul 2004 18:17:04 GMT, Derrick Steed
wrote:

FWIW, on Tuesday evening I decided to investigate turning stall/spin
behaviour in my '20 at a sensible altitude. It was calm and with
little air movement under a high overcast. With the aircraft clean and
flaps at zero (setting 3) I flew some moderately steep turns - about
45 degrees of bank and at speeds ranging down to about 43 kts. This
was completely uneventful - no buffeting, burble or hints of
departure. In short, it flew like a pussycat. I'll try this again by
myself in a turbulent thermal next time because all that series of
turns told me was that in nearly still air my '20 can fly uneventful
turns at stupidly slow airspeeds. By comparison I typically fly at
48-50 kts for that steep a turn in zero flap during normal thermalling
turns.

Dear Martin, In your next flight-test-experiment with the ASW-20, try
a climbing turn stall at good altitude. Bank into a right turn at
60-65 knots and as the right wing goes down pull back fairly hard and
steadily on the stick to make the glider go up and slow down. Keep
pulling back and wow! you will stall over the top and quickly too. I
think that this has been the cause of more than one low altitude
glider crash. I tried this in my '20 when Walt Cannon and I were
having a similar discussion about stalling in the ASW-20. Let me
know how it works and what you think. Rudy Allemann

Any particular reason you picked a right turn? Mine tends to drop the
left wing in a stall.

Your suggestion sounds like a good exercise to try: normally I don't
go below 50 kts at the top of a fast pull-up. Maybe Monday or
Tuesday....

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