Have a look at the time line. 24 hours refurbishment time enables about one flight per week (because of the other, non-refurbishment activities). The 24 hours are the time it takes to stuff the stage back into the pipeline.This would nicely reconcile the statement by Gwynne Shotwell and Jim.
(averaged across N flights? Or "in the typical case"? Or "in the best case"?)
Quote from: jpo234 on 03/10/2017 08:55 pmHave a look at the time line. 24 hours refurbishment time enables about one flight per week (because of the other, non-refurbishment activities). The 24 hours are the time it takes to stuff the stage back into the pipeline.This would nicely reconcile the statement by Gwynne Shotwell and Jim.Exactly. Why is this so hard to grasp? No need to go to conspiracy theories...
There are three options, and at least by the people who posted so far, the majority thinks that F9B5 will be able to achieve (in time) "readiness to proceed" in 24 hours.I'm good with that - I'm glad so many people think it's no big deal and almost self-evident.
Quote from: meekGee on 03/11/2017 02:20 amThere are three options, and at least by the people who posted so far, the majority thinks that F9B5 will be able to achieve (in time) "readiness to proceed" in 24 hours.I'm good with that - I'm glad so many people think it's no big deal and almost self-evident.No, the majority believes thats what Spacex's goal is. Nowhere did anyone say they believed it.It is far from self-evident and it is only belief based. Much like a religion. There is no evidence to support the claim. It is further evidence of the cult of personality surrounding Spacex
[snip] But it's too early to tell whether their response will be to give in and make a "block 5 1/2" or settle for larger-than-24hr refurb or something else. I'd argue it's too early for SpaceX to tell as well: they have to find out what's going to go wrong with their plan before they can figure out what to do about it.
I think there will be a block 5 and a half (or for simplicity block 6). Block 5 is for commercial crew (and potentially first DoD launches), so it will stay stable. They may even keep one line making those cores while the transition the other line to an updated version.
No, this is exactly what Spacex said it will not do. There will be only version of F9 for all users.
I honestly think Block 5 will NEVER be the final F9 version, they'll find more thrust in the Merlins, or have some more minor improvements along the way. I think the fact that Block 3 was called "Full Thrust", and then they found 2 more major ways to increase engine thrust, will indicate that they'll most likely make a Block 6 or "Upgraded Block 5".