This arrangement leads to a few complicated welding and machining processes, but surprisingly these obstacles can be overcome by simply printing a rocket engine on a 3D printer. The current engine ...

In March, the company became the first to design, build and test a 3D-printed jet engine for the U.S. military after completing successful fire tests, igniting fuel in a 500-pound thrust ...

Hybrid rocket engines offer perks from both worlds, with simple solid fuel and the ability to throttle down by regulating oxidizer flow. Naturally, [Integza] decided he should try and 3D print one.