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Recovering from a stall...


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Written on: 06. 04. 2011 [21:28]
fliteadmin
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registered since: 26.12.2006
Posts: 463
The aviation industry has taught wrong stall recovery techniques over decades. Without explaining yet what the correct procedure would be, what have you been taught how to recover from a stall? Would you agree with what you have been taught?


 
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Written on: 14. 09. 2011 [20:59]
ekranoplan
Board Cadet Pilot
registered since: 13.08.2011
Posts: 16
Signs of approaching stall:

Low and reducing airspeed
Higher than normal pitch attitude (except in approach configuration in decent)
Less effective control feel


Incipient stall:

Stall warner
Light buffet


Full stall:

Heavy buffet
Nose drop (except wept wings where tips stall first)
Wing Drop (possible with side slip)
Sink (High Rate of Decent is what kills)

Recovery:

Just do exactly what Test pilots and military trained aircrew have always done:

Reduce AoA by moving the control column centrally forward until the wing is flying again then add power and climb away.

For JAR/FAR25 flight test it is always lower the nose attitude to re-establish wing lift, pause, than approaching 1.2 Vs add full thrust.

If you experience a wing drop NEVER add rudder or aileron as the a/c will likely enter a spin.

Spin = Stall + undemanded roll or yaw.

So with wing drop use same stall recovery technique as standard: Control column centrally forward until stall waring /buffet removed, once at safe speed add power and then roll wings level and climb away.




NEVER JUST ADD POWER! This will exacerbate recovery and induce a nose up pitching moment.

Remember: how does a glider pilot recover from a stall? (not with power!)



Written on: 16. 09. 2011 [21:30]
fliteadmin
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registered since: 26.12.2006
Posts: 463
Hi ekranoplan,

Excellent post! Thank you. Even though we do not practice these things anymore on the actual airliner or bizjet, it's essential to think about it again and again and to practice it at least in the simulator.


 
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