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Aileron reversal occurs when deflecting an aileron down

  • A.Increases the wing's lift beyond its structural limit
  • B.Causes the aileron hinge to fail
  • C.Stalls the outer wing
  • D.It twists the wing nose-down, losing lift

Answer: D

The downward deflection produces a nose-down pitching moment on the section, and if the wing is torsionally soft the resulting twist reduces the incidence more than the aileron adds. Above the reversal speed the roll response is in the wrong direction entirely.

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