Which of the following is an outer surface of the wing that helps form the airfoil?

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Multiple Choice

Which of the following is an outer surface of the wing that helps form the airfoil?

Explanation:
The outer surface that forms the airfoil is the skin. The skin provides the continuous, smooth curved surface of the wing that the air flows over, creating lift. Internal structures like ribs give the cross-sectional shape, and spars run spanwise to carry loads and maintain the wing’s shape, but they don’t form the airfoil surface themselves. The wing tip is simply the outer edge at the end of the wing, not the component that defines the airfoil’s contour. So the skin is the part that shapes and covers the airfoil.

The outer surface that forms the airfoil is the skin. The skin provides the continuous, smooth curved surface of the wing that the air flows over, creating lift. Internal structures like ribs give the cross-sectional shape, and spars run spanwise to carry loads and maintain the wing’s shape, but they don’t form the airfoil surface themselves. The wing tip is simply the outer edge at the end of the wing, not the component that defines the airfoil’s contour. So the skin is the part that shapes and covers the airfoil.

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