That’s right, the Raptor engine is only the THIRD attempt at making this crazy type of engine. The Raptor is a full-flow, staged combustion engine powered by cryogenic methane and liquid oxygen.
And fingers crossed, it’ll be the first full flow staged combustion cycle engine to reach orbit too. SpaceX has successfully test-fired the new Raptor rocket engine that will launch the company's planned interplanetary spaceship, according to a series of tweets …
Well, actually, just about everything this engine does will be a first.
It’s the first to ever do any work and leave the test stand! The Raptor engine is designed to power the spaceship currently known as Starship as part of the rocket assembly currently known as Super Heavy (previously dubbed the BFR).