The Microturbo TRS 18 is a small, low thrust turbojet designed and built in France in the 1970s.

The TRS 18 was originally designed for self-launching motor gliders but was adapted to power conventional ultralight aircraft and unmanned vehicles (RPV).

It was originally designed and developed by Sermel, a competitor company to Microturbo which the latter took over in 1971.

[1] It is a simple, low thrust, reverse flow single shaft engine with a centrifugal compressor and axial turbine.

[2] It gained its US Federal Aviation Administration type certificate in May 1976.