40K views · 701 reactions | NASA has conducted a test of RS-25 engine No. 2063 at the Fred Haise Test Stand at the Stennis Space Center as part of the preparations for future Artemis flights with the SLS. Test duration was five minutes (300 seconds) with a maximum 109% power level. | NASASpaceflight.com | Facebook

Engines are mounted on massive test stands built to handle extreme heat, high-pressure exhaust, and volatile fuels. When fired, engineers measure thrust, fuel efficiency, combustion stability, and durability under real launch-like conditions. Different engines—liquid, solid, or hybrid—are tested in their own ways. For liquid engines, super-cold fuels like liquid hydrogen and oxygen are pumped in and ignited to produce controlled thrust. Hundreds of sensors monitor pressure, temperature, vibratio