View Single Post
  #53  
Old August 29th 12, 03:43 AM posted to rec.aviation.soaring
Duster
external usenet poster
 
Posts: 161
Default Another stall spin

Bill D On Saturday [in part]

...If you look carefully at Bruno's video of the inadvertent, incipient spin, you will see a moment where the stick is moving progressively left even as the glider accelerates its roll to the right. That's the instant he departed from controlled flight - the glider was not 'answering' his aileron input. It should set off all the alarms in your head as it did in his. For me, it's like an electric shock.
Bruno's recovery was not textbook but it worked extremely well. He unloaded the wing by moving the stick forward unstalling the wing and reentering the realm of controlled flight where his ailerons worked normally. Even his narration indicated he didn't apply opposite rudder in a timely manner as the text books call for. Actually, I think he did the right thing - first unload the wing then, after it unstalls, fly the glider normally.


Bill makes several good points. However, Bruno's response to the
incipient right-hand spin as viewed on his tape (
http://www.youtube.com/watch?v=PpJA5...feature=relmfu ) and
narrated in his YouTube comments is not what happens. He does have the
stick biased to the left, but then after he enters the spin and his
reaction is to jam more opposite aileron in. Also, I do not see him
unload the wing and the stick never appears to move forward, at least
by much. His rudder input is what appears to unstall the glider. To
quote from his 70K viewed video. " I instinctively moved the stick
left after the wing dropped to the right and started spinning. It
didn't cause the spin entry because I did it after the spin started.
You are completely right though that I should have moved the stick
back to neutral or even into the turn. I thought I had at the time the
video proved I didn't.  Can't argue with video. -Bruno"