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The Hermes C launch vehicle, which eventually became the Redstone rocket, was proposed in 1946. Not long afterwards, a clustered 2-stage design of the same engine was proposed but got shelved. In 1957 it was the basis for what later became the Saturn I rocket. Now, what would happen if the US decides to develop the Saturn I in 1947 instead of 1957? Does it fail disasterously or does the US suddenly have the ability to launch satellites in the early 50s with manned missions before OTL Sputnik?