The neat thing is he utilizes the temperature change of the liquid oxygen expanding to cool the chamber and nozzle before ... Build and Test Small Liquid-Fuel Rocket Engines.

However, thanks to the modular design of the test engine, only the small nozzle section had to be reprinted ... as a torch igniter for a much larger rocket engine. Fuel is injected into the ...

to help power the SLS rocket on future Artemis missions to the moon and beyond, beginning with Artemis V. Teams are evaluating the performance of several new engine components, including a nozzle ...