Rotax 912

The Rotax 912 is a horizontally-opposed four-cylinder, naturally-aspirated, four-stroke aircraft engine with a reduction gearbox. It features liquid-cooled cylinder heads and air-cooled cylinders. Originally equipped with carburetors, later versions are fuel injected. Dominating the market for small aircraft and kitplanes, Rotax produced its 50,000th 912-series engine in 2014. Originally available only for light sport aircraft, ultralight aircraft, autogyros and drones, the 912-series engine was approved for certified aircraft in 1995.

Rotax 912
Rotax 912ULS 100 hp (75 kW) installation in a 3Xtrim 3X55 Trener
Type Piston aircraft engine
National origin Austria
Manufacturer Rotax Aircraft Engines
First run 1984
Major applications Light sport aircraft
Ultralight aircraft
Produced 1989–present
Variants Rotax 914
Rotax 915 iS
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