PPRuNe Forums - View Single Post - Tolerating an un-airworthy aircraft. Wing drops at stall
Old 25th Oct 2020, 03:58
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Bend alot
 
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Originally Posted by B2N2
Care to explain to us how that would aerodynamically happen in a power off straight ahead wings level coordinated stall as per certification requirements?

A wing drop indicates an asymmetry in how the stall propagates from the wing root to the tip.
A generic light SE GA airplane does not experience a full wing stall just a partial wing stall as indicated by aileron effectiveness well into the buffet.

Unless we are flying an elliptical wing planform with rounded wingtips but that’s not what the original poster was asking about.
Aircraft as mentioned have rigging tolerances of the control surfaces - typically +/- 2 degrees. Unlike other types there is no max between the L/H and R/H, so you can be correctly rigged with a 4 degree difference with the ailerons. There can also be the difference in cable tensions between L/H and R/H, this will have a lesser effect but still an effect.

Then you add in the flaps with a tolerance in L/H and R/H rigging - often streamlined to the aileron so adding to the aileron bias.
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