Exploration Upper Stage: Difference between revisions

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Line 44: [[Boeing]] announced on 21 December 2020 that the EUS of the SLS completed a [[Design review (U.S. government)\|critical design review]] (CDR) with NASA. That review confirmed the design of the EUS, allowing Boeing to proceed with development of the stage, including hardware fabrication.<ref name="SN20201222">{{cite web \|url=https://spacenews.com/sls-exploration-upper-stage-passes-review/ \|title=SLS Exploration Upper Stage passes review \|publisher=SpaceNews \|date=22 December 2020 \|access-date=22 December 2020}}</ref> In March 2022, Boeing revealed plans for an all-composite variant of the EUS, as well as the successful results of pressure tests done on a prototype. The variant was projected to reduce EUS stage mass by 30 percent.<ref name="nsf-20220305">{{cite web \|title=With all-composite cryogenic tank, Boeing eyes mass-reducing space, aviation applications \|url=https://www.compositesworld.com/articles/nasaboeing-composite-launch-vehicle-fuel-tank-scores-firsts \|access-date=2 June 2024 \|date=28 January 2016 }}</ref> Development of the first EUS began in 2024.<ref>{{Cite web \|title=NASA spotlights future-focused EUS design \|url=https://www.boeing.com/content/theboeingcompany/us/en/features/2024/03/nasa-spotlights-future-focused-eus-design \|access-date=2024-06-12 \|website=www.boeing.com \|language=en-US}}</ref> === Funding history ===