Supercritical airfoil
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A supercritical aerofoil is an airfoil designed primarily to delay the onset of wave drag in the transonic speed range.
NASA TF-8A in 1973
Thomas McMurtry before his flight on the Vought F-8A Crusader Supercritical Wing Airplane
Supercritical airfoil Mach number/pressure coefficient diagram (y axis: Mach number, or pressure coefficient, negative up; x axis: position along chord, leading edge left). The sudden increase in pressure coefficient at midchord is due to the shock.
Airfoil
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An airfoil or aerofoil is a streamlined body that is capable of generating significantly more lift than drag. Wings, sails and propeller blades are examples of airfoils. Foils of similar function designed with water as the working fluid are called hydrofoils.
Lift and drag curves for a typical airfoil
An airfoil section is displayed at the tip of this Denney Kitfox aircraft, built in 1991.
Airfoil of a Kamov Ka-26 helicopter's lower rotor blade