SpaceX's Raptor 3 Engine: 35% More Thrust, No Heat Shield Needed
How SpaceX Streamlined the Raptor Engine
SpaceX's Raptor engine has evolved from a tangle of pipes to a sleek, integrated design. The Raptor 3, which first flew in May, delivers 35% more thrust than the original. This article explores the engineering behind the transformation, focusing on the full-flow staged combustion cycle and how SpaceX managed to eliminate external plumbing and heat shielding.
The evolution is so dramatic that many folks initially believed that it wasn’t real; Tory Bruno, the then-CEO of space launch company United Launch Alliance, tweeted that there was “no need to exaggerate this by showing a partially assembled engine,” which was followed by SpaceX president Gwynne Shotwell tweeting a picture of the Raptor 3 firing successfully.
- ecshafer
I find it mind boggling that you can 3d print rocket engines. I thought that the standard line is that 3d printing metal wasn't developed enough for anything serious. Not a mechanical/materials engineer, but if you can 3d print rockets what's off the table? Jet Engines and that's about it I think?
From the article links, I am amused that SpaceX uses cybertrucks to tow their rocket engines around the grounds and not a normal cheaper truck. They also do it in a totally uncovered trailer, which must be good for the guys taking pictures for forums. But isn't that also good for guys taking pictures for competitors / Russians/ China?
- avmich
The thrust vector control (TVC) subsystem is usually considered a part of the engine. The major change the Soviet NK-33 underwent for a USA model was the addition of TVC, and the engine was named differently, so there are two engines, named differently, which mostly differ by the presence of TVC.
Raptors can be used without TVC. Be that by using differential thrust, or just not needing that - because rocket is controlled using other means, or other engines - it's possible. Tory Bruno specifically explained that he meant - among other things - that absence.
A picture of the engine working on the test stand can be that for the engine - or for the chamber, a significant component of the engine, with or without turbopumps involved.
- fragmede
3d printing metal has come a long way!