Timeline for Optimum velocity for first stage separation in a two-stage launcher
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| Jul 10, 2015 at 2:55 | history | edited | geoffc |
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| Feb 26, 2015 at 17:41 | answer | added | xxyxyx | timeline score: 5 | |
| Feb 25, 2015 at 19:02 | comment | added | Deer Hunter | This is one of the most important fundamental questions I've ever seen on this site. | |
| Feb 25, 2015 at 11:42 | history | tweeted | twitter.com/#!/StackSpaceExp/status/570549515243159553 | ||
| Feb 25, 2015 at 7:37 | comment | added | neelsg | I would imagine that it might also be easier to make the first stage reusable if it reaches a lower maximum velocity | |
| Feb 25, 2015 at 6:15 | comment | added | Adam Wuerl | The Saturn V is a poor comparison because it’s a 3-stage rocket and had a much higher ideal delta-V, since it’s mission was the moon, not LEO. Rocket design is exceedingly complex, and for an actual vehicle determining the ideal delta-V split depends on the specifics of almost all aspects of the design: propellant, staging, engines, aerodynamics, etc. | |
| Feb 25, 2015 at 0:13 | comment | added | Russell Borogove | Falcon 9, using the same fuel (and almost the same engine) on both stages, would have different optimization considerations. | |
| Feb 25, 2015 at 0:03 | comment | added | Russell Borogove | The Saturn V upper stages were hydrogen fueled; at first blush one would assume you wanted as much of the delta-v as possible delivered on hydrogen/LOX instead of kerosene/LOX because of its ISP advantage. However, hydrogen stages are vastly larger in volume than equivalent delta-v of kerosene/LOX, so one possible explanation could be that the S-II stage was as big as was practical for a hydrogen stage and the rest had to be done in kerosene. | |
| Feb 24, 2015 at 23:50 | history | edited | geoffc |
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| Feb 24, 2015 at 23:39 | comment | added | Deer Hunter | Obligatory (assuming no Wertz/Larson at hand): projectrho.com/public_html/rocket/multistage.php | |
| Feb 24, 2015 at 22:20 | review | First posts | |||
| Feb 24, 2015 at 22:32 | |||||
| Feb 24, 2015 at 22:20 | history | asked | xxyxyx | CC BY-SA 3.0 |