NASA Artemis I Wet Dress Rehearsal Countdown Continues – Proceed to refuel

Artemis I SLS Wet dress rehearsal

NASA’s Space Launch System (SLS) rocket carrying the Orion spacecraft is seen on a mobile launch vehicle at Launch Complex 39B Sunday, April 3, 2022 as the Artemis I launch team conducts the wet dress rehearsal test at the Kennedy NASA Space Center in Florida. Ahead of NASA’s Artemis-I flight test, the wet rehearsal will take the Artemis-I launch team through operations to load fuel, perform a full launch countdown, demonstrate the ability to recycle the countdown clock, and close the tanks dump to practice schedules and procedures. Credit: NASA/Joel Kowsky

The wet dress rehearsal countdown resumed at 10:52 a.m. EDT and the clocks resumed at T-6 hours, 40 minutes on the clock (L-7 hours, 10 minutes). A new scheduled T-0 of 18:02 has been established.

Fixed a previous issue with supplier failure of gaseous nitrogen needed for tank preparations. Overnight, the teams also resolved the malfunctioning issue of the fans used to pressurize enclosed areas in the mobile launch vehicle to keep out dangerous gases, and they have a plan for operating the fans to prevent problems from reoccurring to prevent. The team was able to successfully spin up the primary fan and keep it running all night to inspire confidence and configured the secondary fan to run at 80% capacity to support tank operations.

At approximately 10:00 a.m. EDT, the launch supervisor gave the green light to begin refueling the rocket. Cryogenic loading operations are scheduled to begin with the cooling of the liquid oxygen lines for the core stage. Once propellant operations begin, liquid oxygen (LOX) and liquid hydrogen (LH2) flow into the rocket’s core stage and intermediate cryogenic propulsion stage tanks, and are topped up and replenished as some of the cryogenic propellant vaporizes. The team will also conduct leak tests to ensure propellant loading is proceeding as expected.

Twitter account.

The next blog update will be provided when core stage propellant loading is underway. NASA Artemis I Wet Dress Rehearsal Countdown Continues – Proceed to refuel

Russell Falcon

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