3 ms·
The word to google for is "ullage" There's been a lot of creative solutions. If you have non-cryogenic fluids you can use pressurized bladders. Lots of stran
by VLM 7y ago
The word to google for is "ullage"
There's been a lot of creative solutions. If you have non-cryogenic fluids you can use pressurized bladders. Lots of strange looking (to me) surface tension designs exist to manage the bubble, as long as the bubble is far from the intake who cares. Supposedly the cryogenic Saturn V third stage simply vented its boiloff to the rear such that the stage was essentially under continuous tiny acceleration, which must have made the navigation calculations interesting and set a time limit on how long you could screw around in low orbit before going to the moon.
- Rooster61 7y ago> Supposedly the cryogenic Saturn V third stage simply vented its boiloff to the rear This occured after the ullage burn. The vents were not enough to do it alone, but they did keep the propellant settled between the cut off of the ullage burn and the real burn. https://space.stackexchange.com/questions/31618/why-did-the-ullage-motors-for-the-s-ivb-tli-burn-shut-down-prior-to-s-ivb-igniti https://space.stackexchange.com/questions/31618/why-did-the-... Also, I believe the Saturn V also had baffled propellant tanks to help keep the propellants from getting too unsettled even in zero-g.