NASA remains on schedule for an Artemis I cryogenic demonstration test on Wednesday, September 21. In the days since the previous launch attempt, engineering teams have analyzed the seals that were replaced on an interface for the liquid hydrogen fuel line between the Space Launch System (SLS) rocke
Based on recent engineering assessments, the new cryogenic loading procedures and ground automation will transition temperatures and pressures more slowly during tanking. This is expected to reduce the likelihood of leaks that could be caused by rapid changes in temperature or pressure.
After both tanks have reached the replenish phase, the pre-pressurization test will bring the liquid hydrogen tank up to the pressure level it will experience just before launch while engineers calibrate the settings for conditioning the engines at a higher flow rate, as will be done during the terminal count.
Call to stations for the demonstration occurred at 5 p.m. EDT Monday, September 19. The launch director is expected to give a “go” to begin loading cryogenic propellants into the rocket at approximately 7 a.m. on Wednesday. The test is planned to conclude around 3 p.m. after the teams have met the objectives and will not go into the terminal count phase of the launch countdown. Teams may extend the duration of the test should circumstances warrant it.
During the test, teams will load propellants into both the core stage and upper stage tanks, and Orion and the SLS boosters will remain unpowered. Meteorologists currently predict favorable weather for the test with a 15% chance of lightning within 5 nautical miles of the area, which meets theNASA Television will provide
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