Timeline for Ullage control on stage shutdown?
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Apr 5, 2021 at 22:23 | comment | added | DrSheldon | @user39728: Best to use ullage in that case. I have numbers handy for Saturn IB. First stage engine cutoff at T+140.65, second stage engine start T+143.35. That's less than 3 seconds between stages, and they still used ullage motors! | |
| Apr 5, 2021 at 21:27 | comment | added | user39728 | Thanks! Would 15s between MECO and stage-2 engine startup be too much? Or would stage the engine maybe be able to fire right away without ullage control? | |
| Apr 5, 2021 at 21:23 | history | answered | DrSheldon | CC BY-SA 4.0 |