Wing twist is primarily implemented to improve aileron control during which flight condition?

• A. Cruise at high altitude
• B. Descent with heavy flaps
• C. During a stall, to improve aileron control at high angle of attack
• D. Takeoff roll

Answer: (C)

Wing twist is used to preserve aileron effectiveness when the wing is at high angle of attack, such as during a stall. By designing the wing so the root has a higher angle of attack than the tip (root stalls before the tip), the airflow over the outer wing and ailerons remains attached longer as the airplane approaches stall. This keeps the ailerons usable and helps the pilot maintain roll control when it’s most needed. The other flight conditions—cruise at high altitude, descent with heavy flaps, or takeoff—do not involve the same risk to aileron control at high angle of attack, so wing twist isn’t primarily for those situations.