and even hybrid rocket engines are becoming passé. We’ve never seen a liquid-fuel rocket build before, so that’s what this roundup evolved into. First up is [Robert Watzlavick], who has been ...

EDIT: [RM] tells me his engine cost less than $2000 to make. If just 10 people wanted ... If you’d like your own 3D printed rocket engine, you might do well to drop [Rocket Moonlighting] a ...