The Rocketdyne F-1 is a liquid-fueled rocket engine that was developed in the 1950s. It is best known for powering the first stage of the Saturn V rocket during the Apollo missions, which took astronauts to the Moon. The F-1 engine burns RP-1 (a refined form of kerosene) and liquid oxygen, producing a thrust of about 1.5 million pounds. Each Saturn V rocket was equipped with five F-1 engines, arranged in a circular pattern. The F-1 remains the most powerful single-chamber liquid-fueled rocket engine ever built. Its design and performance have influenced many subsequent rocket engines in the aerospace industry.