Timeline for answer to Did the Perseverance rover's Atlas 5 really "leap off the pad"? If so, was it because the payload is tiny, or because it's going to Mars? by Loren Pechtel
Current License: CC BY-SA 4.0
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| Oct 9, 2020 at 3:58 | vote | accept | CommunityBot | moved from User.Id=12102 by developer User.Id=47211 | |
| Aug 1, 2020 at 2:56 | comment | added | Loren Pechtel | @uhoh It's dictated by how much power is needed. A lighter Mars probe wouldn't have needed the strap-ons, a heavy enough satellite to LEO would have. | |
| Aug 1, 2020 at 2:56 | comment | added | user12102 | I'm thinking that rocket's configuration is dictated by where its going; the proximal cause may be the number of boosters but the root cause is the destination. | |
| Aug 1, 2020 at 2:53 | comment | added | Loren Pechtel | @uhoh Good point, it had more SRBs than a typical Atlas. That's just the configuration of the rocket rather than where it's going, though. | |
| Aug 1, 2020 at 2:50 | comment | added | user12102 | I'm thinking that it's the destination that matters most for the initial take-off acceleration. Since a large delta-v is needed for an interplanetary transfer, they added more SRBs, and that results in a larger thrust to weight ratio excess (how much it is greater than 1:1) and therefore initial acceleration rate. | |
| Aug 1, 2020 at 2:46 | history | answered | Loren Pechtel | CC BY-SA 4.0 |