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 ...

[Sam Rogers] and colleagues at [AX Technologies] have been testing and developing a small liquid ... This engine intended to be used as a torch igniter for a much larger rocket engine. Fuel ...

Liquid oxygen boils at -183°C (–297°F), and requires specialized fuel storage and other equipment, Lee said. That may account for why North Korea conducted multiple static rocket tests late ...