EASA Module 11 Practice Exam

On a delta wing aircraft, which control surface combines the functions of elevator and aileron?

Elevators Ruddervators Elevons Ailerons

Correct Answer:

Elevons

Explanation:

Elevons blend pitch and roll control. On a delta wing, the outer trailing-edge surfaces act as one control surface that can move symmetrically to create pitch moments (like an elevator) or differentially to create roll moments (like an aileron). This lets a single surface provide both functions, which suits the delta wing’s geometry. Elevators alone control pitch, ailerons alone control roll, and ruddervators—combining rudder and elevator—appear on V-tailed aircraft, not on delta wings.

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