Describe differential aileron travel.

• A. The aileron on the descending wing extends up more than the lifting aileron extends down.
• B. The descending wing's aileron moves downward more than the other
• C. They both move equally
• D. The descending wing's aileron never moves

Answer: (A)

Differential aileron travel means the two ailerons do not move the same amount in opposite directions during a roll. When the aircraft rolls and one wing is descending, that wing’s aileron moves upward by a larger amount than the other wing’s aileron moves downward. This configuration reduces lift on the descending wing and moderates the overall yaw and wing loading, helping keep control more coordinated and the structure under less stress. So describing the descending wing’s aileron as extending up more than the lifting wing’s aileron extends down captures how the system alters travel to improve roll behavior.