Airfoil

From Simple English Wikipedia, the free encyclopedia

Various components of the aerofoil.
Various components of the aerofoil.

An airfoil (in American English, or aerofoil in British English) is the shape of a wing or blade (of a propeller or ship's screw or sail) as seen in cross-section. It is passed through a fluid in order to provide either lift or downforce, depending on its application.