From 2010: There's More Than One Way To Turn A Rotor!
It was a site -- and sound to see/hear... Avimech Aircraft's Dragonfly, at first glance, looks like a bare bones single place helicopter. Then you look at the rotor blade tips and realize there is something different. The tips have small rocket nozzles on them! In fact this helicopter has no conventional engine! The tips are propelled by the rotor rocket nozzles, eliminating the need for a gearbox and conventional powerplant. The Dragonfly is lightweight at 220 lbs and can carry payloads of up to 800 lbs. Dragonfly's two fuel tanks
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