SpaceX has notched up another milestone in the development of Starship, fixing its Raptor Vacuum engine to the spacecraft and test-firing it for the first time. This marks another important step in ...

Obligatory, I'm not a rocket scientist/engineer. Hell, I'm not even a science graduate. My question is how exactly the test, tests, what is supposed to happen in vaccum, when it is done in atmosphere?

Nothing like a mach diamond on a Monday morning. SpaceX has fired up its Raptor Vacuum engine, conducting a full-duration test at its rocket development and testing facility in McGregor, Texas. Watch ...

Alliant Techsystems recently demonstrated a critical capability of its liquid oxygen (LOX)/Methane rocket engine by igniting it in a vacuum chamber. The successful ignition test was designed to ...