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 (UAS) have proved challenging to develop. LiquidPiston, a startup developing a novel powerplant 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 multifuel rotary combustion engines ...
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