The O.S. MAX 40 FP RC Airplane Engine is a high-quality 2-stroke engine designed specifically for RC airplanes and aircraft. With a displacement of .40, it is compatible with nitro and glow fuel, making it suitable for experienced pilots aged 17 years and up. Manufactured in Japan by the reputable brand O.S., this radial engine is a reliable choice for hobbyists looking to upgrade their remote control vehicles.