How SpaceX Streamlined the Raptor Engine
5 hours ago
- The SpaceX Raptor engine evolved from a complex tangle of pipes (Raptor 1) to a streamlined design (Raptor 3) with about 35% more thrust.
- It is a full-flow staged combustion (FFSC) engine, using two preburners to drive fuel and oxygen pumps, a design previously only attempted twice without flight success.
- Key changes across versions include removing sensors, eliminating spark igniters, replacing bolted flanges with welded connections, and internalizing piping via 3D printing.
- The streamlining eliminated the need for a large heat shield and fire suppression systems, reducing mass significantly.
- Despite simplification, internal complexity increased, and the engine still faces issues such as failed starts during test flights.