#3 VS-300 helicopter in the hangar, September 9, 1939, shortly before its inaugural flight.

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VS-300 helicopter in the hangar, September 9, 1939, shortly before its inaugural flight.

A Look Back at the Vought-Sikorsky VS-300: Pioneering the Skies as the World’s First Successful Helicopter

#3 VS-300 helicopter in the hangar, September 9, 1939, shortly before its inaugural flight.

Vehicles & Transportation