Engines Raptor The Raptor engine is a reusable methalox staged- combustion engine that powers the Starship launch system. Raptor engines began flight testing on the Starship prototype rockets in July 2019, becoming the first full-flow staged combustion rocket engine ever flown. HEIGHT 120 m / 394 ft DIAMETER 9 m / 30 ft PAYLOAD TO LEO 100+ t / 220+ klb