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Old 02-20-2018, 07:03 PM   #271
Messierhunter
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Here's a video I did summarizing my tracking of the second stage and then using Orbiter to simulate the launch to match the observed trajectory (roughly):
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Old 03-11-2018, 07:35 AM   #272
Nicholas Kang
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No, we are not yet done with this.

Some more footage...



1:11 shows the booster heading straight for the Atlantic, just beside the drone ship.
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Old 03-11-2018, 11:03 AM   #273
Artlav
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Oh, and was the center core crash video released?
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Old 03-11-2018, 10:08 PM   #274
Thunder Chicken
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Good thing it missed

I wonder if that is something coded in the guidance - if engine failure is detected on final approach, try to miss the landing ship? Though there are only a few seconds to play with, so I'm guessing luck is more probable.

Which leads to the concern that, if they have a bad accident on the landing ship, the whole economic model SpaceX is pursuing (lower cost access to space through reuse and rapid turnaround) grinds to a halt until they can replace the ship. It probably wouldn't have been fatal this instance as many of the subsequent missions were throwing away older block stages, so they had some time to cope with the loss. But if this were to happen when the Block 5 fleet is in full operational tempo, that would be catastrophic to the company.

Investing in some more recovery drone ships with a spare or two on standby would probably be a smart investment at this point.
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Old 03-11-2018, 10:26 PM   #275
Artlav
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AFAIK, the guidance does actually converges to a spot in the ocean right next to the barge until the very last moment, to avoid hard impacts like that.

Can't quite find how much the barge cost, but i doubt it's more than one first stage, so they'll have spares.
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Old 03-11-2018, 10:52 PM   #276
GLS
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Quote:
Originally Posted by Artlav View Post
 Oh, and was the center core crash video released?
If we play that in reverse, we get a SLBM launch.
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Old 03-12-2018, 12:15 AM   #277
Thunder Chicken
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Quote:
Originally Posted by Artlav View Post
 Can't quite find how much the barge cost, but i doubt it's more than one first stage, so they'll have spares.
At the moment they have two, one for the Atlantic (OCISLY) and one for the Pacific (Just Read The Directions). If the lose either, especially OCISLY, they lose recovery capability for heavy payload or high orbit missions until it can be replaced. While inexpensive, it would potentially be months before another could be sourced.
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Old 03-12-2018, 03:44 AM   #278
Unstung
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Quote:
Originally Posted by GLS View Post
 If we play that in reverse, we get a SLBM launch.

Last edited by Unstung; 03-12-2018 at 04:25 AM.
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