Revolutionary Design. Evolutionary Performance.

Since the mid-1960’s, Superior Air Parts has built a legacy as a leader in making general aviation engines greener, more attainable and more affordable.

Now, with the development of the Gemini Diesel we are bringing that same commitment to innovation to a new-generation of greener, more flexible and more economical engines.

Gemini’s unique two-opposed-pistons-per-cylinder design offers a number of advantages over current diesel designs including:

  • Smaller size for greater installation flexibility
  • High power-to-weight ratio
  • Mechanically simpler design with fewer moving parts
  • Highly-efficient two-stroke operation
  • Green operation with much lower emissions
  • Runs on available Jet A, diesel or bio-diesel fuels
  • Up to 20% lower fuel burn than avgas-burning piston engines
  • Retrofittable with many current piston engine designs
  • Horsepower ranging from 80 to 550*
*Engines are currently in development. Specific models and horsepower ratings are subject to change.