Thermal Core Tip Stalling

On Tue, 31 Jan 2006 10:56:28 -0800, Marc Ramsey
wrote:

Jim wrote:
I have some difficulty understanding what the yaw string is
indicating. It appears the glider falls off in the direction of the
pre-stall bank. I would have expected a slipping stall/spin to fall
off in the direction of the applied rudder instead. In the case of a
slipping stall I would have thought this would be opposite the
direction of the pre-stall bank. Learn something evey day.

I can't speak for Chris, but I can tell you what works for me. Get into
a steep stable slip, say left wing down, full right rudder. Now,
imagine that you don't like what you're seeing, and "recover" by kicking
and holding full left rudder, followed shortly by moving the stick all
of the way to the back right corner. In the G103s and K21s I've tried
this in, the nose will yaw (quickly) to the left, left wing will drop,
nose falls through, and you'll spin for part or all of a turn, then the
speed starts increasing and you end up in a spiral...

Marc

Yes, I can certainly visualize that! It sounds like one would be
going from a full-rudder left slip into a full-rudder left skid, for
which the glider oblidges the pilot with a spin out the bottom. Whew.