Superior Air Parts Gemini Diesel 100

The Superior Air Parts Gemini Diesel 100 is a diesel aircraft engine, under development by Superior Air Parts of Coppell, Texas, United States for use in homebuilt aircraft.^[1]

Gemini Diesel 100
Type	Aircraft engine
National origin	United States
Manufacturer	Superior Air Parts

The company is owned by the Chinese company Superior Aviation Beijing, which is 60% owned by Chairman Cheng Shenzong and 40% owned by Beijing E-Town, an economic development agency of the municipal government of Beijing.

Design and development

The Gemini Diesel 100 is a three-cylinder two-stroke, in-line, supercharged liquid-cooled, diesel engine design. It produces 100 hp (75 kW), with a helical gear mechanical gearbox reduction drive with a reduction ratio of 1.586:1.^[1][2][3]

The engine design uses an opposed-piston engine, with "two-opposing-pistons-per-cylinder", based upon the Second World War 6-cylinder, 12-piston Junkers Jumo 205 engine concept.^[3]

The engine was originally developed by UK based Powerplant Developments, who flew development engines for more than 10,000 hours. Superior acquired the company in 2015.^[4][5]

The engine will not be type certified and is therefore intended for homebuilt and light-sport aircraft.^[2]

Specifications (Gemini Diesel 100)

Data from Tacke and manufacturer^[1][2]

General characteristics

• Type: Three-cylinder, two-stroke aircraft uniflow diesel engine
• Bore: 70 mm (2.8 in)
• Stroke: 72 mm (2.8 in)
• Dry weight: 72.5 kg (159.8 lb)

Components

• Fuel type: Diesel fuel, bio-diesel and Jet-A
• Cooling system: liquid
• Reduction gear: helical gear mechanical gearbox, reduction ratio of 1.586:1

Performance

• Power output: 100 hp (75 kW)

See also

Related lists

• List of aircraft engines