How to build a transparent hybrid rocket engine using acrylic rod and a canister of oxygen, with a breakdown of how various other types of rocket engines work along the way. Consider supporting my ...

So they used wax. You can see a video about the process, including a build of a model rocket engine, in the video below. The issue is the creation of tiny cooling channels in the combustion chamber.

Shown here is a one-eighth scale model of the NERVA (Nuclear Engine for Rocket Vehicle Application) nuclear rocket test engine on a movable stand equipped with rails. Originally conceived by the ...

For the moment, only a single nuclear rocket engine has been built for the sole purpose of ferrying humans into space, the fission-based NERVA rocket developed by Los Alamos Laboratories of New ...