One of his more interesting builds is his series on building rocket engines out of PVC pipe written in conjunction with [Chuck Knight]. For the propellent grains, the PVC rocket didn’t use the ...

One just launched the world’s biggest rocket, with mixed success. The other makes small model rockets for hobbyists, and it’s ...

The newly tested engines could power a variety of space projects.

Although there was briefly a company called Rotary Rocket ... and offers very smooth power transfer and high power to weight ratio. The downside, though, is that the engine deliberately burns ...