Helicopters



Experimental German WWII Heicopter

   In the years before World War II, both the U.S Army and the RAF had experimented with autogiros. These were aircraft that employed a propeller to make a forward motion and used a freely rotating unmotorized rotor for lift.  Autogiros proved too expensive and mechanically complex and were supplanted by conventional light aircraft.  Helicopters played no role in WWII.


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