Breguet-Richet Gyroplane
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The Breguet-Richet Gyroplane was an early French experimental quadcopter rotary-wing aircraft developed by Breguet Aviation.
Model of the Bréguet-Richet Gyroplane No.1.
De Bothezat helicopter
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The de Bothezat helicopter, also known as the Jerome-de Bothezat Flying Octopus, was an experimental quadrotor helicopter built for the United States Army Air Service by George de Bothezat in the earl
Breguet-Richet Gyroplane
…Cornu helicopter de Bothezat helicopter Young, Warren R. The Helicopters. "The Epic of Flight". Chicago: Time-Life Books, 1982. ISBN 0-8094-3350-8…
De Bothezat Quadrotor