Article
This rocket engine could save fuel on the long trip to Mars | Space

NASA completed a round of testing last year with the “rotating detonation rocket engine. NASA placed a supersonic combustion engine on the firing stand, and early tests for interplanetary exploration show promise.

NASA Video
NASA test-fires 3D-printed Rotating Detonation Rocket Engine – Could be revolutionary!

Tau.Neutrino said:

Article
This rocket engine could save fuel on the long trip to Mars | Space

NASA completed a round of testing last year with the “rotating detonation rocket engine. NASA placed a supersonic combustion engine on the firing stand, and early tests for interplanetary exploration show promise.

NASA Video
NASA test-fires 3D-printed Rotating Detonation Rocket Engine – Could be revolutionary!

3D-printed?

Not made of plastic I assume.

3D printed metals tend to be sintered and therefore porous and not suited for rocket engines – have they overcome this?

NASA’s rotating detonation rocket engine posts record test results