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Forum:	Exploration: Moon to Mars
Topic:	NASA's Artemis II mission (Orion/SLS)

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Your Reply: HTML is ON UBB Code is ON Smilies Legend	[QUOTE]Originally posted by Robert Pearlman: [B]NASA release <blockquote><font size="+0">[b]Propellant loading underway for wet dress rehearsal[/b]</font> Following a "go" to begin tanking operations at 9:27 a.m. EST on Thursday (Feb. 19) and the successful chilldown of the liquid hydrogen and liquid oxygen lines, teams have started slowly filling the Space Launch System's core stage with super-cold liquid hydrogen, chilled to minus 423 degrees Fahrenheit, then with liquid oxygen chilled to minus 297 degrees. This marks the official start of propellant loading for the Artemis II wet dress rehearsal. Slow fill is a deliberate process that allows the tanks and associated hardware to thermally condition before transitioning to fast fill. This step minimizes thermal stress and ensures the integrity of the system as hundreds of thousands of gallons of cryogenic propellant flow into the core stage. [b]Update for 10:43 a.m. EST[/b]: Teams have transitioned from slow fill to fast fill for liquid oxygen on the core stage of the SLS rocket. Liquid hydrogen remains in slow fill for the core stage.</blockquote> <center><iframe width="400" height="225" src="https://www.youtube.com/embed/-KYhqePsm38?si=xSdvlPejrM0cSV5r" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></center>[/B][/QUOTE]
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