Where are the Leading Edge Flaps located and how do they deflect in different flight regimes?

• A. Deflect asymmetrically in takeoff.
• B. They provide yaw control.
• C. During takeoff/landing deflect symmetrically to change lift; In flight deflect asymmetrically to aid the ailerons; located on the inboard and outboard edge of each wing.
• D. They are located on the tail.

Answer: (C)

Leading edge flaps are wing devices that change the wing’s camber to affect lift. They sit on the leading edge of each wing—two segments per wing, inboard and outboard. When the airplane is at takeoff or during landing, these flaps deflect symmetrically downward to increase camber and lift, helping shorten takeoff distance and slow down stall. In flight, they can deflect asymmetrically between the left and right wings to create a lift differential that aids the ailerons in rolling, improving control without needing as much aileron deflection. They’re not mounted on the tail, and their primary lift/roll function isn’t about yaw control.