Rocket Crafters spearheads the use of 3D-printed combustion chambers as part of its quest for safer, better-performing hybrid engines.22 SpaceX and Rocket Lab use additive manufacturing to print nearly the entire engines for their Dragon thrusters and Electron main engines, respectively. And Relativity Space, which secured $140 million in Series C funding in October 2019, is on track to launch its entirely 3D-printed rocket by 2021—which would make it the first company to do so.
