ULPower UL390i
The ULPower UL390i is a Belgian aircraft engine, designed and produced by ULPower Aero Engines of Geluveld for use in homebuilt aircraft. == Design and development == The engine is a six-cylinder four-stroke, horizontally-opposed, 3,888 cc (237.3 cu in) displacement, air-cooled, direct-drive, gasoline engine design.