There are ___ slat surfaces on each wing and ____ flap surfaces on each wing.

There are ___ slat surfaces on each wing and ____ flap surfaces on each wing.

• A. 5; 2
• B. 4; 3
• C. 6; 2
• D. 5; 3

Answer: (A)

Leading-edge devices on the A320 wing consist of several individual surfaces that can extend to increase lift. On each wing, there are five slat-type surfaces available for lift augmentation, not just two. These include the primary leading-edge slats plus additional Krueger-type surfaces that deploy in different flight regimes to reshape the wing. The trailing edge uses two flap surfaces per wing, which are the main trailing-edge flaps used to increase camber and lift during takeoff and landing. So, per wing you have five slat surfaces and two flap surfaces.

Leading-edge devices on the A320 wing consist of several individual surfaces that can extend to increase lift. On each wing, there are five slat-type surfaces available for lift augmentation, not just two. These include the primary leading-edge slats plus additional Krueger-type surfaces that deploy in different flight regimes to reshape the wing. The trailing edge uses two flap surfaces per wing, which are the main trailing-edge flaps used to increase camber and lift during takeoff and landing. So, per wing you have five slat surfaces and two flap surfaces.