Timeline for More efficient SpaceX landings?
Current License: CC BY-SA 3.0
13 events
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| Mar 8, 2017 at 19:47 | history | edited | OrangePeel52 | CC BY-SA 3.0 |
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| Mar 8, 2017 at 19:16 | comment | added | Enigma Maitreya | @jkavalik not wanting to push this to a chat but if one then delays the time for the "burn back" then one should also be increasing the distance for the point of launch to the point of recovery and although it may be minimal reduce the speed due to micro resistance as the 1st stage speed will not sustain an orbit. Thus reducing the amount of fuel required to slow the 1st stage down. Shrug I am confident SpaceX has this all figured out though. | |
| Mar 8, 2017 at 18:58 | comment | added | jkavalik | @EnigmaMaitreya yes, for the low margin ones landing far from the coast that is the case as I understand it, the entry burn gets longer to protect the stage from the harsher reentry. But that is too late to move the touchdown point significantly closer. | |
| Mar 8, 2017 at 18:15 | comment | added | Enigma Maitreya | @jkavalik reference this image spacex.com/sites/spacex/files/16892430560_f87dff78c0_o_1.jpg Taking your JCSAT-16 is it possible that the functionality of the "boost back burn" and the "entry burn" become the same leaving one or the other "not listed" this may be consistent with what the OP was also getting at. | |
| Mar 8, 2017 at 18:14 | comment | added | Jake Blocker | Oh so only missions with extra fuel can to a boostback to land closer to the shores | |
| Mar 8, 2017 at 18:05 | comment | added | jkavalik | As a weak reference for no boostback the JCSAT-16 webcast or Eutelsat/ABS both show Entry burn and Landing on their timeline, but no boostback and I am quite sure it is not called out either. | |
| Mar 8, 2017 at 17:59 | comment | added | OrangePeel52 | I think i have corrected my answer | |
| Mar 8, 2017 at 17:59 | history | edited | OrangePeel52 | CC BY-SA 3.0 |
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| Mar 8, 2017 at 17:56 | comment | added | jkavalik | @JakeBlocker launches like JCSAT-16 did not have the boostback burn. As a result they land more than 600km from the coast where the landings of CRS-8, Iridium-1 or Jason-3 were around 300km iirc. | |
| Mar 8, 2017 at 17:53 | comment | added | jkavalik | No - 2 burns are only used for very low margin landings, mostly on GTO launches. Barge landings which can afford it still use 3 burns as can be seen for example on the timeline of the Iridium-1 webcast. | |
| Mar 8, 2017 at 17:48 | comment | added | Jake Blocker | I thought that barge landings still require a small boostback to put it on the proper trajectory to intercept the barge. On all the launches I've watched they call out a boostback on barge landings. | |
| Mar 8, 2017 at 17:48 | history | edited | OrangePeel52 | CC BY-SA 3.0 |
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| Mar 8, 2017 at 17:41 | history | answered | OrangePeel52 | CC BY-SA 3.0 |
