De Bothezat helicopter test flight shows the quadrotor aircraft flying just above the ground
Dayton Ohio USA Date:1923 Duration:1 min 22 sec Sound:NO SOUND
De Bothezat helicopter with four rotors rotating at each end of its arms. The experimental quadrotor designed by George de Bothezat is seen in flight at McCook Field in Dayton Ohio. The helicopter rising just above the ground and moving from side to side but remaining just aloft, then descending while a man stands nearby.
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