We’ve seen some more sophisticated 3D printed rocket engines lately, such as this vortex-cooled, liquid-fuel engine, and over on Hackaday,IO, here’s a 3D printed engine attempting to use PLA ...

[Sam Rogers] and colleagues at [AX Technologies] have been testing and developing a small liquid-fueled rocket engine and successfully used vortex cooling to protect a resin 3D printed combustion ...

The Agnibaan SOrTeD’s engine is a key innovation. Co-founder and CEO Srinath Ravichandran explained that it takes 72 to 75 hours to 3D print one of these rocket engines in raw form. The startup ...