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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]Firing room communications problem[/b]</font> Teams in the firing room at NASA's Kennedy Space Center Launch Control Center are experiencing an issue with ground communications and have moved to backup communication methods to maintain safe audio command and control. The launch director has decided to maintain the current vehicle state, continuing the liquid oxygen fast fill, but delaying moving into liquid hydrogen fast fill, while engineers troubleshoot the issue. [b]Update for 11:45 a.m. EST[/b]: Normal communications have been restored, and NASA teams have made the decision to transition to fast fill of the SLS rocket's core stage with super-cold liquid hydrogen. Core stage liquid oxygen remains in fast fill. Fast fill rapidly loads hundreds of thousands of gallons of liquid hydrogen and liquid oxygen into their core stage tanks. During this process, teams also monitor for leaks and conduct engine bleed procedures to thermally condition the RS-25 engines for launch. Once fast fill is complete, operations will move to topping and replenish phases. Up next, teams will start chilling down the liquid hydrogen tank on the interim cryogenic propulsion stage – or the upper stage – of SLS.</blockquote> [/B][/QUOTE]
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