Gyrodyne
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A gyrodyne is a type of VTOL aircraft with a helicopter rotor-like system that needs to be driven by its engine only for takeoff and landing, and includes one or more conventional propeller or jet eng
A Fairey FB-1 Gyrodyne
The Fairey Rotodyne Y in 1959
Image of baseline GBA-DARPA Heliplane concept, showing its free-spinning rotor, which is fitted with integral tipjets, fed with bypass air from two Williams gas-turbine propulsion engines.
Pilatus Agusta A109 Flug