Artemis II Countdown Hiccup Prompts Seal Upgrades Ahead of Next Rehearsal

TL;DR Summary
NASA is fixing a hydrogen-fuel leak on the Space Launch System before the Artemis II countdown rehearsal, after a confidence test showed reduced fuel flow and a filter replacement is planned. The safety limit for hydrogen concentrations, raised to 16% from 4% since Artemis I, remains in effect based on test data. Artemis III will seek cryoproofing and redesigned propellant-loading interfaces; if Artemis II misses March, additional launch opportunities exist in April and May.
Topics:science#artemis-ii#hydrogen-leak#space#space-launch-system#tail-service-mast-umbilical#wet-dress-rehearsal
- NASA has a new problem to fix before the next Artemis II countdown test Ars Technica
- Following Confidence Test, NASA Continues Artemis II Data Review NASA (.gov)
- Why are the launch windows for NASA's Artemis 2 moon mission so short? Space
- NASA loading liquid hydrogen aboard Artemis 2 rocket in unannounced test Spaceflight Now
- Artemis II speech calls moon 'our proving ground' for deep-space missions Florida Today
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