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X-Engine Offers Compact UAV Power

Military and other operators prefer using kerosene, rather than gasoline, across ground and air platforms, but lightweight, reliable heavy-fuel engines for unmanned aircraft systems have proved challenging to develop.

LiquidPiston, a startup developing a novel power-plant that is smaller and lighter than piston diesel engines and more efficient than gasoline engines, has been boosted by winning Sikorsky’s Entrepreneurial Challenge.

Developing multi-fuel rotary combustion engines based on its high-efficiency hybrid thermodynamic cycle (HEHC), the Bloomfield, Connecticut-based company has won $25,000 and the opportunity to explore applications for its X-engine on Sikorsky products.