MILESTONE: Successful fire of our E-1 bi-metal highest performance 3D printed 🚀 rocket engine.

Successful fire of our E-1 bi-metal highest performance 3D printed 🚀 rocket engine. No thermal expansion or bonding issues. Copper alloy liner printed by 3T RPD (www.3trpd.co.uk/) on EOS (www.eos.info/en) M290. Inconel spray coating by Hitemco (hitemco.com/).

[@SergeTarasoff]

What is the purpose of such coating?

[@quinn165]

Nice static fire, would you consider that a hard start?

[@benjaminbrown3939]

What is the ISP for that rocket engine?