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AlexanderHowl · 06-12-2019, 03:44 PM

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.

06-12-2019, 03:44 PM	#22
AlexanderHowl Join Date: Feb 2016	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.