An airfoil or (aerofoil), such as the wing of an aircraft, produces a
resultant force acting upwards, i.e., transversely to the direction of
flight. The forces involved are dependent on the speed of the aircraft
(the dynamic pressure increases proportionally to the square of the
speed) and more particularly also on the geometric features of the
wing – i.e., its-cross sectional shape and its shape in plan.
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