the subject of rocket engines was one of the first to come up. There was a problem though; solid rocket motors are far too common to be interesting, and even hybrid rocket engines are becoming passé.

Liquid fuelled engines are throttleable and monstrously powerful, but highly complex. Meanwhile, solid rocket engines are simple and cheap, but once you light them, they’re going full-bore until ...

Like liquid rocket engines, hybrid rocket motors can be shut down easily and the thrust is throttleable. The theoretical specific impulse (Isp) performance of hybrids is generally higher than solid ...

A team from the University of Glasgow and Oles Honchar Dnipro National University in Ukraine have created a rocket engine to change that. It burns a solid propellant rod that doubles as the rocket ...

In both instances, the engines performed nominally, even demonstrating that they could compensate for eventualities: When one of Vulcan's solid rocket boosters had an anomaly on the second flight ...