Jurgen Heinen, of Germany, machined this engine from aluminum bar stock and produced the finish by hand in 1994. It has a bore of 32 mm and a stroke of 28 mm with a total displacement of 20 cc. It is a belt driven, dual overhead cam, single-cylinder engine with four valves—two for the intake and two for the exhaust. It burns methanol on glow ignition and spins a 20 x 8 propeller up to 14,000 RPM. The engine is 12″-long, 6″-wide, and 7″-high.