The first helicopter. (30 sept 1939 año – 30 sept 1939 año)
Descripción:
On September 14 of 1939 the first practical helicopter took flight in Stratford Connecticut. Designed by Igor Sikorsky and built by the Vought-Sikorsky Aircraft. The helicopter was the first to incorporate a single main rotor and tail rotor design.Añadido al timeline:
fecha:
30 sept 1939 año
30 sept 1939 año
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