Rotax 912

The Rotax 912 is a horizontally-opposed four-cylinder, naturally-aspirated, four-strokeaircraft 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.

In the 2020s, the engine is used in unmanned aerial vehicle (UAV) applications, such as the UAEREACH-S drone.