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Airplanes-helicopters. History: the first autogyro flew -VIDEO of period
Rome, italy - The Spanish Juan de la Cierva created it a few years before
An autogyro also known as gyroplane, gyrocopter, or rotaplane, is a type of rotorcraft that uses an unpowered rotor in autorotation to develop lift, and an engine-powered propeller, similar to that of a fixed-wing aircraft, to provide thrust. While similar to a helicopter rotor in appearance, the autogyro's rotor must have air flowing through the rotor disc to generate rotation. Invented by the Spanish...
AVIONEWS - World Aeronautical Press Agency