NASA Begins SLS Sound Suppression Testing, Prepares for Engine Testing This Summer

A 5-percent scale model of the Space Launch System (SLS) is ignited for five seconds to measure the effects acoustic noise and pressure have on the vehicle at liftoff. The green flame is a result of the ignition fluid that is burned along with the propellant during this short-duration test.Image/Caption Credit: NASA/MSFC/David Olive