The De Bothezat helicopter built by George de Bothezat. The quadrotor aircraft being tested at McCook Field in Dayton, Ohio, United States. The DeBothezat rotorcraft with four huge rotor blades lifts off, hovers and touches the ground several times.
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.