Quote:
Originally Posted by AlexanderHowl
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.
|
You can guarantee anything you want to, but the stats you gave with stages getting 3.12 mps off of a 65% fuel mass imply an Isp of 488 seconds.