The Bristol Hercules is a British aircraft engine developed during World War II. It is a radial engine, known for its reliability and power, primarily used in military aircraft such as the Avro Shackleton and Bristol Beaufighter. The Hercules engine features a 14-cylinder design and was capable of producing up to 2,000 horsepower. This engine was notable for its innovative design, which included a single-row configuration that allowed for a more compact and lightweight structure. The Bristol Hercules played a significant role in enhancing the performance of various aircraft, contributing to the success of the Royal Air Force during the war.