Inspired by SpaceX’s work, [Joe Barnard] of [BPS.Space] started working to replicate it at the model ... rocket, he has gotten tantalizingly close to doing a controlled propulsive landing with a ...

Hybrid rocket engines offer perks from both worlds, with simple solid fuel and the ability to throttle down by regulating oxidizer flow. Naturally, [Integza] decided he should try and 3D print one.

China says it fired up the world’s largest single-segment solid-fuel rocket engine for the first time, at a ground testing facility in the country’s northwest on Tuesday. The rocket’s 3.5 ...