Hybrid rockets, which date back to the 1930s, fall in between these two systems. They are inherently safe, use nontoxic, inexpensive fuels, and can be turned on and off. But scientists have been ...

We are fascinated by the hybrid rocket engine which [Ben Krasnow] built and tested in his shop. It is actually using a hollow cylinder of acrylic as the fuel, with gaseous oxygen as an oxidizer.

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 ...

HICKAM will design and manufacture a modular, compact, and portable testing platform for characterizing hybrid rocket engines. The team will also manufacture two 300 lbf hybrid rocket motors to prove ...

Chinese astronauts have just created rocket fuel and oxygen in space using a new type of "artificial photosynthesis." The breakthrough technology, which used fairly basic equipment and minimal energy, ...