Discussion
A pilot rolls into a turn using ailerons alone and finds the nose initially yaws away from the intended direction before the turn establishes.
What is happening?
Answer: C
Correct answer: Adverse yaw from unequal induced drag
The symptom is diagnostic. The down-going aileron raises lift and induced drag on its wing, so the aeroplane carries more drag on the side that is rising, and the nose yaws away from the intended turn before the bank establishes the turn itself.
Aileron reversal would roll the aeroplane the wrong way, not yaw it, and would appear at high speed rather than low. A stalled fin would show as a directional divergence, and a misrigged rudder would give a persistent yaw rather than one tied to aileron input.
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