Timeline for Center of gravity calculation for any rocket or launch vehicle
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 25, 2018 at 14:18 | vote | accept | Amar | ||
| Sep 12, 2018 at 16:31 | comment | added | uhoh | @Hobbes so I've just asked Do some solid rockets burn faster at the bottom? What's an extreme case? | |
| Sep 12, 2018 at 11:25 | comment | added | uhoh | @Hobbes there are several designs for the way solids burn and it's not necessarily 100% one or the other. However only the longitudinal difference makes any difference in this context. | |
| Sep 12, 2018 at 8:34 | comment | added | Hobbes | @uhoh, solids burn from the inside out, not so much bottom-up. You want the outside to remain covered in propellant until burnout. | |
| Sep 8, 2018 at 16:10 | comment | added | Russell Borogove | @uhoh Liquid stage CM moves downward; overall rocket CM tends upward (because of upper stages and payload). Solid boosters have some extra weight at the base (nozzle) that I imagine outweighs the nosecone, so their CM should also move down very slightly. | |
| Sep 8, 2018 at 15:42 | comment | added | Organic Marble | Fun fact: a full shuttle external tank's propellant tank CG is pretty much at its geometrical center, and so is an empty one's. So during launch there is a minimum longitudinal CG that then jumps back up. I remember calculating where this inflection point was, long ago. | |
| Sep 8, 2018 at 15:20 | comment | added | uhoh | Would there be a tendency for the CM of liquid fuel rockets to move "downwards" along the axis as propellant is consumed, while for solids, if at all, the CM might move "upwards"? | |
| Sep 8, 2018 at 14:59 | history | edited | Russell Borogove | CC BY-SA 4.0 |
added 69 characters in body
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| Sep 8, 2018 at 14:39 | history | answered | Russell Borogove | CC BY-SA 4.0 |