"As the bottom of the surface meets the air, it compresses it and accelerates it downwards. As a result of this definite action there is an equal and opposite reaction upwards." —Barber, 1917

Aerodynamic of Airplane Wing

"As the bottom of the surface meets the air, it compresses it and accelerates it downwards. As a result…

An airplane wing free body diagram illustrating forces acting on the wing.

Airplane Wing Free Body Diagram

An airplane wing free body diagram illustrating forces acting on the wing.