ESA - 3D-printed storable-propellant rocket engine design tested

The recent hot firing of a full-scale rocket thrust chamber assembly takes us a step closer to proving 3D-printing for an engine design destined for rocket upper stages, in-orbit transportation applications (kick-stages and space-tugs), microlaunchers, and exploration spacecraft such as a lunar lander and ascent stage on the Moon.

3D Printed Rocket Motor is Fuel Efficient

4.0 In-Space Propulsion - NASA

ESA completes first test fire of ArianeGroup 3D printed rocket engine - 3D Printing Industry

Selected results of hot fire tests of hybrids using 98% HTP and HTPB as

Test Stands – Beyond NERVA

3D-Printed Rockets Set To Blast Off

Ariane 6: ESA Space Transportation Program - eoPortal

Rocket Factory Augsburg talks reusability plans and 3D printing

Additive manufacturing for space propulsion

Rocket Crafters Tests STAR-3D 3D Printed Rocket Engine « Fabbaloo