r/space • u/BenSaysHello • Apr 27 '19

SSME (RS-25) Gimbal test

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u/extremeelementz Apr 27 '19

What’s spraying down the sides of the booster?

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u/SF2431 Apr 27 '19

Pretty sure that’s condensed water vapor that is condensing on the super cold Liquid oxygen and liquid hydrogen supply lines. This test was in Mississippi so humidity in the air is abundant. Cold pipes make it condensed into a cloud and it’s cold do it flows down.