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helicopter Article

What is the principle of helicopter flight?

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A helicopter obtains its lifting power using a rotating airfoil (the rotor). Its main airfoil is the rotating blade assembly mounted atop its fuselage on a hinged shaft (mast) connected with the engine and flight controls. The tail of a helicopter is somewhat elongated compared to that of an airplane, and the rudder smaller and fitted with a small antitorque rotor.

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