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.

Model rockets, in contrast, generally use solid rocket engines that mix the oxidizer and fuel into a single package, and they are ignited with heat.

About the Archimedes engine Archimedes is the 3D printed, reusable rocket engine designed and manufactured by Rocket Lab to power the Company’s new Neutron rocket.

The Rocketdyne F-1 engine was like the big block V8 muscle car engine. A testament to the time-honored American saying, "no replacement for displacement." ...