Testing and inspection of Plane-Radial lifting screw and pitch variation of the de Bothezat helicopter.
Dayton Ohio USA Date:1921, July 24 Duration:3 min 43 sec Sound:NO SOUND
View of rotor blades revolving on a vertical axis above the fuselage. Engineers working on Plane-Radical lifting screw and inspecting the pitch variation of De Bothezat helicopter during its development at McCook Field in Dayton Ohio, under a contract with Russian immigrant George de Bothezat issued by the U.S. Army Air Service. Engineers inspecting at fuselage. Professor George de Bothezat, the inventor of the helicopter, Lieutenant Colonel J.E.Fetchet and Major T.H.Bane discussing. Professor De Bothezat and four officers sitting on cart to which the screw is attached are lifted as the large rotor turns. The rotor went on to be used in the so called Jerome-de Bothezat Flying Octopus helicopter that featured four 6-bladed rotors.
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