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Superior Launches 100 hp Diesel Engine

Gemini Sparkle

Key Takeaways:

  • Superior Air Parts is launching the Gemini 100, a 100-horsepower compression ignition diesel engine designed to directly compete with the Rotax 912 series for experimental and light-sport aircraft.
  • The engine features a unique design with six horizontally opposed pistons in three cylinders, is two-stroke, supercharged, liquid-cooled, and weighs about 200 pounds with a projected 4.5 gal/hr fuel burn.
  • Targeted at an aftermarket price of around $25,000 with a 2,000-hour TBO, it will be introduced for the experimental market first, followed by LSA approval, with formal market introduction early next year.
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Superior Air Parts is taking direct aim at the market turf dominated by the Rotax 912 series piston engine with a 100 horsepower compression ignition diesel for experimental and light-sport aircraft called the Gemini 100.

The engine is a unique design adopted from a British-born aero diesel that’s been in development for more than a decade by a now-defunct company called Powerplant Developments. The ultra simplistic configuration features six horizontally opposed pistons housed in three cylinders, each sharing a common fuel injector and glow plug.

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