The inboard and outboard ailerons are primarily designed to prevent which issue at high speeds?

• A. Wing flutter
• B. Wing twist/aileron reversal
• C. Spoiler deployment
• D. Excessive drag

Answer: (B)

At high speeds the wing can twist under aerodynamic loads, and this twist interacts with the aileron deflection. When an aileron is moved, it changes the camber and lift of that wing section, creating a twisting moment. If only one aileron is used, the wing’s torsion can cause the roll input to become less effective or even reverse, a situation called aileron reversal. Having both inboard and outboard ailerons spreads the control load across different wing panels, reducing the twisting moment and maintaining effective roll control as speed increases. That distributed approach is what helps prevent wing twist/aileron reversal at high speeds.