![]() | Antonov "Helicoplane" 1910 | ![]() |
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In 1907 military engineer K.A.Antonov applied for, and in 1912 obtained a patent for his "Helicoplane". Aircraft was built and tested in St.Petersburg (1910). It was a helicopter of coaxial scheme with additional propeller for horizontal movement. All rotors were driven by single 35hp engine. Aircraft had a collective pitch control of main rotors. It was supposed that 0° pitch will be used for parachuting or gliding. Despite all systems worked as expected, "Helicoplane" failed to takeoff.
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