De Bothezat helicopter being tested during its development at the engineering division of McCook field in Dayton,Ohio
Dayton Ohio USA Date:1922 Duration:2 min 33 sec Sound:NO SOUND
General Mason M. Patrick,Chief of Air Service inspects De Bothezat helicopter during its development at engineering division of McCook field in Dayton, Ohio. Brigadier General William "Billy" Mitchell also takes a look at the helicopter. Russian immigrant George De Bothezat, the inventor of the helicopter, speaks to the officers. Two lift tests are shown with one lifting 1000 pounds and the other lifting 3500 pounds at 160 horsepower.
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