SpaceX Raptor

Raptor is a family of rocket engines developed and manufactured by SpaceX for its Starship launch system, where it powers both the Super Heavy booster and the Starship second stage. It burns subcooled liquid methane and liquid oxygen, a pairing known as methalox, in a full-flow staged combustion cycle that routes the whole flow of both propellants through the turbines using oxidizer-rich and fuel-rich preburners. It was the first full-flow staged combustion engine to power a vehicle in flight, on the Starhopper test vehicle in July 2019. Versions include the Raptor Vacuum with an extended nozzle for use in space, the redesigned Raptor 2, and Raptor 3, which moves plumbing and sensors into the engine structure so that protective shrouds are no longer needed. Raptor is designed for reuse with little maintenance.