California-based aerospace and defense leader Aerojet Rocketdyne, a subsidiary of Aerojet Rocketdyne Holdings, Inc., recently achieved another aerospace 3D printing milestone, with the successful hot-fire test of a full-scale, additively manufactured thrust chamber assembly for its RL10 rocket engine. The RL10 thrust chamber assembly was built from a copper alloy, using SLM technology. Aerojet's RL10 has been the premier upper-stage rocket engine for over fifty years in the US, and the company has been working to incorporate 3D printing technology into the RL10, and other propulsion systems, for ten years, in order to keep production costs down while also enjoying the performance and design capabilities of 3D printing technology. Read more at 3DPrint.com: http://3dprint.com/170213/aerojet-3d...-rl10-chamber/