Superior Engines Announces 100 HP Diesel Program

Superior Gemini Diesel engine
Superior Gemini Diesel engine

This morning at the Sun ‘n Fun Fly-in, Superior engines announced their new diesel engine program, starting with a 100 HP three-cylinder (six piston) engine targeted at the LSA market. The Gemini Diesel is now running on test stands in the UK and at Superior’s headquarters near Dallas and runs on diesel fuel or Jet A. The dual-crankshaft engine is a unique layout for the traditional aircraft engine market, but they are confident that the technology will be a viable replacement for the similar-sized Rotax 912, offering better specific fuel consumption and increased range on the same amount of fuel.

They are estimating a retail price of around $24,900, with availability around the first of next year. We’ll bring you more details as soon as we have them.

Superior Gemini Diesel engine

Superior Gemini Diesel engine

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Paul Dye
Paul Dye, KITPLANES® Editor at Large, retired as a Lead Flight Director for NASA’s Human Space Flight program, with 40 years of aerospace experience on everything from Cubs to the Space Shuttle. An avid homebuilder, he began flying and working on airplanes as a teen and has experience with a wide range of construction techniques and materials. He flies an RV-8 and SubSonex jet that he built, an RV-3 that he built with his pilot wife, as well as a Dream Tundra and an electric Xenos motorglider they completed. Currently, they are building an F1 Rocket. A commercially licensed pilot, he has logged over 6000 hours in many different types of aircraft and is an A&P, FAA DAR, EAA Tech Counselor and Flight Advisor; he was formerly a member of the Homebuilder’s Council. He consults and collaborates in aerospace operations and flight-testing projects across the country.


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