Sunday, September 20, 2009

Stall tendency of Fokker F27 and YS-11

Both Fokker and YS-11 twin propeller has a tendency of stall on take off and yaw turning.
I expereience at last thrice for my Fokker and at least a few buddies in youtube,.

It seems on full throttle take off, especially if there is crosswind, one wing tries to lift while the other wing has not supersede the stall speed. The sinking wing, with its propeller, will fall back into its turbulence and yaw towards itself. This results in a viscious cycle as the higher, outer wing at full throttle will make the inner wing stall further.