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 ...

There was a problem though; solid rocket motors are far too common to be interesting, and even hybrid rocket engines are becoming passé. We’ve never seen a liquid-fuel rocket build before ...

NASA's Reactive Additive Manufacturing for the Fourth Industrial Revolution (RAMFIRE) project test-fired a 3D-printed engine nozzle at Marshall Space Flight Center in Alabama. See the test in ...