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Old 10-15-2018, 01:13 AM
BARGeezer BARGeezer is offline
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Quote:
Originally Posted by MarkB.
I'm sure Luke Strawwalker will chime-in on this, but the short version is that Saturns II, III and IV were designs that didn't make the cut as the lunar mission evolved. I'm pretty sure the Saturn V was the Saturn IV with an extra engine so the "number of engines" reason is not that far off.


Spot on. The Silverstein Committee proposed eight designs for the Saturn launch vehicles (see pic below). C-1 became the Saturn 1. A refinement of the C-1 became the Saturn 1B. C-5 became the Saturn V. If C-2, C-3, and C-4 had been built they might have been the Saturn II, III, and IV.


More info in this Wikipedia article, scroll down to Silverstein Committee:
https://en.wikipedia.org/wiki/Saturn_(rocket_family))
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