The engine is a Rotec Radial R2800 7 cylinder of 110 hp. It is made in Australia. The 2 brothers that manufacture the engine are fantastic model airplane builders, (serious) that is how they started. Their business is booming. Their R3600 150hp 9 cyclinder radial is also doing quite well. The engines are of phenominal quality and reliability. Their father runs the day to day business end, and the two brothers concentrate on the engineering and manufacturing.