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externally blown flap
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externally blown flap

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Quick Summary

An externally blown flap is a component of an aircraft designed to increase lift and drag. This allows planes to land at slower speeds. In this system, the exhaust from jet engines is directed onto a large flap extension surface. This technology is part of a broader category of powered-lift aircraft, which can alter the direction of their thrust during flight. These aircraft often integrate the airframe and propulsion system closely, allowing the engine exhaust to affect the aerodynamics of the airframe. Other types of powered-lift aircraft include vectored jets and externally blown wings.12

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2 Britannica Sources
  1. wing flap
  2. helicopter - Powered lift

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