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Surprise! Surprise! NASA officials hinted at a conference October 10th that the first SLS launch will likely be delayed again, from late in 2020 to the first half of 2021.
This actually isn’t news. When NASA committed in July to doing a full static fire test of SLS’s first stage it almost guaranteed that the first launch could not happen before 2021.
What this means is that Trump’s desire to have a lunar landing, with SLS, by 2024, is practically impossible, even if Congress should agree to provide full funding, which it has not. SLS as designed simply cannot meet the launch pace required to get a lunar landing by 2024. It is too cumbersome, designed badly in terms of management and efficiency.