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 ...

there’s more than enough info on his site to try and recreate some of his experiments, but perhaps you should start here instead: How to Design, Build and Test Small Liquid-Fuel Rocket Engines.

A rocket stove offers a practical way to concentrate fire’s heat in one direction and reduce fuel consumption. Whether you need to purify water, cook food, or simply stay warm, this build is one ...