The Birth of the First Helicopter in the World
The VS-300 is a helicopter with the world's first operational main rotor, laying the foundation for modern helicopter technology.The first test flight of the VS-300 helicopter took place in 1939. ...
The VS-300 is a helicopter with the world's first operational main rotor, laying the foundation for modern helicopter technology.The first test flight of the VS-300 helicopter took place in 1939. ...
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