We are fascinated by the hybrid rocket engine which [Ben Krasnow] built ... for a valve which connects to the oxygen tank. There is a nozzle on the outflow end. Check out the video after the ...

SpaceX has offered holiday greetings via a spot of synchronized rocket-engine nozzle steering. The quirky 65-second video — which includes the message: “Wishing you a warm holiday season and a ...

Meanwhile, solid rocket engines are simple and cheap, but once you light them, they’re going full-bore until burnout. Hybrid rocket engines offer perks from both worlds, with simple solid fuel ...