Timeline for Shape of Dragon Crew capsule affecting ballistic descent?
Current License: CC BY-SA 4.0
13 events
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| Nov 7, 2018 at 22:26 | comment | added | Saiboogu | Additional bit of info that seems lacking -- The 'black part' is the exhaust for the engines that are critical for launch escape. Propulsive landing was just an additional perk of their existence. | |
| Nov 6, 2018 at 19:59 | history | edited | Hobbes | CC BY-SA 4.0 |
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| Nov 6, 2018 at 15:09 | comment | added | Saiboogu | @user2277550 Capsules roll naturally when not guided (ballistic descent). Stability is natural due to the shape, not gyroscopic. | |
| Nov 6, 2018 at 12:48 | history | edited | Hobbes | CC BY-SA 4.0 |
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| Nov 6, 2018 at 12:36 | history | edited | Hobbes | CC BY-SA 4.0 |
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| Nov 6, 2018 at 11:47 | comment | added | user2277550 | @SteveLinton I am not sure there are any other choices. Of course you could put a heavy gyroscope inside, the way ships do it, but I don't think it will be good enough especially with weight constraints. SpaceX has not talked about many such critical issues, and most people (IMHO) generally accept whatever SpaceX says as gospel. | |
| Nov 6, 2018 at 11:43 | comment | added | Steve Linton | @user2277550 sure, and on acceptance, I'm sure. Do you have any source for the idea that SpaceX will use the same emergency measures as Soyuz? In particular they may have alternatives to gyroscopic stabilization. | |
| Nov 6, 2018 at 11:37 | comment | added | user2277550 | @SteveLinton I would think that such emergency measures have a significant bearing on basic design. | |
| Nov 6, 2018 at 11:36 | comment | added | user2277550 | @Hobbes The front view, IMHO, seems to be problematic. The black parts, when spun around the axis will make it difficult to control the lift. And the black part itself was mainly intended for propulsive landing which they are not using (I read). Of course they could have put it into a wind tunnel, tested it a lot, and put those values into the control system. But there seems to be too many superfluous things in the design itself. | |
| Nov 6, 2018 at 11:30 | comment | added | Steve Linton | @user2277550 I don't think it was clear to most responders that you are talking about emergency and last ditch measures, rather than a routine descent. Without that it could be seen as a "based on this one photo I'm goign to claim that a major company is being incredibly stupid" question which doesn't usually go down well. | |
| Nov 6, 2018 at 11:24 | history | edited | Hobbes | CC BY-SA 4.0 |
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| Nov 6, 2018 at 11:11 | comment | added | user2277550 | Gyroscopic stabilization, at least with Soyuz, is done as a last ditch option to flatten the trajectory during ballistic descent. Ballistic descent itself is done when the spacecraft lift can't be actively controlled, i.e. as a extra safety measure. I am not sure why my question got so many negative votes. | |
| Nov 5, 2018 at 15:02 | history | answered | Hobbes | CC BY-SA 4.0 |