Airfoil (Aerofoil)

The cross section of a body that is placed in an airstream in order to produce a useful aerodynamic force in the most efficient manner possible as in wings, propeller blades, windmill blades, compressor, turbine blades in a jet engine, body of high-speed ship, etc.:


Airfoil (American English) / Aerofoil (British English)

Components of an Airfoil

[image source: http://en.wikipedia.org/wiki/Airfoil]

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