/sci/ - Science & Math

>>11444879
>Kind of a general question, but how do they test vacuum engines on Earth?

Vacuum engines are usually just tested at sea-level without their nozzles attached, their performance in a vacuum, with the nozzle attached is simulated. But there are a handful of facilities (pic-related) that allow the test-firing of smaller vacuum-optimised engines in a simulated environment (a vacuum chamber). Aerojet has one such facility in Florida and the AFRL has one at Edwards AFB which Blue Origin are currently using for BE-7.