NASA encountered some trouble early in the day as the space agency conducted a tanking test to determine if a fuel leak on the Artemis-1 rocket is fixed.
Engineers are allowing this leak to continue up to 10% through fast fill to gather more data on the problem before stopping the flow of liquid hydrogen into the rocket.
The SLS requires more than 700,000 gallons of super-cold liquid hydrogen and liquid oxygen fuel to lift the 322-foot-tall rocket off the launchpad and into space. While an efficient rocket fuel, hydrogen is a tiny molecule that easily leaks. It has previously created problems for the space shuttle program. rehearsal tests and a small leak during the first launch attempt.
“The reason where 4% is set is its kind of the flammability of hydrogen and air. So that’s where you start to enter a certain amount of risk of flammability,” Parsons said. NASA SLS Chief engineer John Belvins said after reviewing all possible causes on the fault tree, he doesn’t believe any one thing caused the leak.
Forecasters with the Space Force 45th Weather Squadron will continue to monitor the weather during the test. Fueling also cannot start if the 24-hour temperature is less than 41.4 degrees Fahrenheit or above 94.5 degrees, but that should not be a problem in mid-September. The forecast high on Wednesday will be in the low 80s.If the fueling test is successful, teams are targeting Sept. 27 for liftoff during a 70-minute window opening at 11:37 a.m. However, that all rides on the outcome of Wednesday’s cryo-loading and if NASA gets approval from the Space Force.
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