Single Rotor “Ball” Drone Mk II

[Carl]

From Make: Magazine - cool take on a drone - single prop and four thrust vectoring vanes.  Full build instructions.

https://makezine.com/projects/single-rotor-ball-drone-mk-ii/

[Sergei Grichine]

This is especially cool because the main rotor could be driven by an old good gasoline engine or a turboshaft engine.

It is not as safe as a helicopter though, as there's no chance of autorotation if the engine fails. Not that I ever said there's anything "safe" in a helicopter...

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Best Regards,

-- Sergei