Engineered Propulsion Systems (EPS) anticipates its Graflight Flat 8 diesel aero-engine will receive FAA certification by year-end. The company is developing Graflight to replace 320-420-hp gasoline engines used in general aviation aircraft. The Jet-A-burning engine should reduce fuel costs by 45% over an equivalent avgas-fueled 350-hp Continental piston engine, according to EPS. But where existing diesel aero-engines are based on automotive engines, the Graflight is a clean-sheet design for ...

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