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airfoil
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airfoil
airfoil An airfoil section displayed at the tip of this Denney Kitfox aircraft (G-FOXC), built in 1991.

airfoil

aircraft part
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Also known as: aerofoil
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Last Updated: • Article History
Also spelled:
Aerofoil
Related Topics:
airplane
wing
chord
stall
angle of attack

airfoil, shaped surface, such as an airplane wing, tail, or propeller blade, that produces lift and drag when moved through the air. An airfoil produces a lifting force that acts at right angles to the airstream and a dragging force that acts in the same direction as the airstream.

High-speed aircraft usually employ low-drag, low-lift airfoils that are thin and streamlined. Slow aircraft that carry heavy loads use thicker airfoils with high drag and high lift.

This article was most recently revised and updated by Amy Tikkanen.