The Hirth F-36 is a single-cylinder, two-stroke, carburetted aircraft engine designed for use on ultralight aircraft, especially powered paragliders and ultralight trikes. It is noted for its extremely small equipped weight of 28 lb (13 kg) including exhaust system, reduction drive and carburetor. It is manufactured by Hirth of Germany. The F-36 was formerly known as the Solo 210, before the design was purchased by Hirth.