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 ...

Although there was briefly a company called Rotary Rocket ... or rotary, engine. If you ever wondered how these worked, why not print a model? That’s what [Engineering Explained] did.

But today, the company announced a €23mn Series A funding round as it looks to ramp up development of its 3D-printed aerospike rocket engine. Among the investors was André-Hubert Roussel ...

Eventually, a 16-foot-tall model of Blue Origin’s New Glenn rocket will take its place beside the engine. Two BE-3U engines power the upper stage of the New Glenn orbital-class rocket ...