MTH R 422-CG

The MTH R 422-CG is an Austrian aircraft engine, designed and produced by MTH Engines of Mattsee for use in ultralight aircraft.

Design and development
The engine is a twin-cylinder two-stroke, in-line, 1339 cc displacement, liquid-cooled, gasoline engine design, with a toothed mechanical gearbox reduction drive with a reduction ratio of 3.0:1. It employs dual electronic ignition systems and produces 105 hp at 6500 rpm, with a compression ratio of 12:1.