luke strawwalker
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Here's an interesting report from Halloween of 68 on using three modified S-IVB stages (modified for longer orbital lifetimes of up to 30 days) stacked in orbit to launch a manned spacecraft on a Mars flyby... The three S-IVC stages would be launched atop two-stage Saturn V vehicles with the third stage as payload, fully fuelled and ready to go. The manned spacecraft would be launched by another Saturn V. The three stages would be stacked in orbit with the manned spacecraft, and ignited and staged sequentially to inject the stack first into an elongated 3 hour earth orbit and then into Trans-Mars Injection trajectory.
The study shows that using sub-chilled hydrogen liquid got a 6% improvement in performance, and including frozen hydrogen suspended in the liquid as a "slush" would increase performance by 7% over the standard liquid hydrogen used on Saturn V.
Enjoy! OL JR
View attachment NASA Study Summary- A Study of Hydrogen Slush or Gel for S-IVC Manned Mars Flyby.txt
The study shows that using sub-chilled hydrogen liquid got a 6% improvement in performance, and including frozen hydrogen suspended in the liquid as a "slush" would increase performance by 7% over the standard liquid hydrogen used on Saturn V.
Enjoy! OL JR
View attachment NASA Study Summary- A Study of Hydrogen Slush or Gel for S-IVC Manned Mars Flyby.txt