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Old 06-12-2019, 03:44 PM   #22
Join Date: Feb 2016
Default Re: Approaching TL9?

I can guarantee you that the each stage is not getting an ISP of 480. A delta-v increase of 2.52 mps (~4.04 km/s) is an ISP of 412, which is well within LOX/LH2 design parameters. The first stage of the Saturn V used RP-1/LOX, so it had only an ISP of 263, but the upper stages used LOX/LH2, so they had an ISP of 421.

Last edited by AlexanderHowl; 06-12-2019 at 03:49 PM.
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