What part of the wings can be modified to increase airfoil camber, add more wing area, or delay airflow separation at high angles of attack?

• A. Leading edge
• B. Trailing edge
• C. Fuselage
• D. Aileron

Answer: (A)

Focusing on the front part of the wing is what changes how the air flows across the surface. Modifications at the leading edge, such as slats or a drooped leading edge, increase the effective camber of the airfoil, can add to the wing’s lifting area, and help energize the boundary layer to keep the flow attached at higher angles of attack. This combination directly enhances lift at low speeds and postpones flow separation, improving stall characteristics.

Trailing-edge changes, like flaps or ailerons, mainly alter lift distribution and controllability but aren’t as effective at increasing camber near the front or delaying separation at high angles. The fuselage isn’t a place to modify wing camber or stall performance, and the aileron is a trailing-edge control surface that doesn’t achieve these effects.