This crossection of a metal 3D printed rocket engine : r/ThingsCutInHalfPorn
Q&A: How 3D Printing Can Enable On-Demand Space Launches - IEEE Spectrum
Sirius Bipropellant Rocket Engine Project - Our Rocket Engine has been 3D printed!! Special thanks to Frazer Nash and Renishaw plc Our project aims to design, build and test a working bipropellant
Students' 3D Printed Rocket Engine - 3D Printing Industry