Quote from: abaddon on 06/02/2020 02:42 pmDM-2 must complete it’s mission before certification and USCV-1. There will be no direct handover.This is also off-topic for this thread which should stay focused on Starliner. It's not off topic. The purpose was to decide when Starliner needs to launch, in addition to when it can launch.
DM-2 must complete it’s mission before certification and USCV-1. There will be no direct handover.This is also off-topic for this thread which should stay focused on Starliner.
Quote from: Nomadd on 06/03/2020 02:45 pmQuote from: abaddon on 06/02/2020 02:42 pmDM-2 must complete it’s mission before certification and USCV-1. There will be no direct handover.This is also off-topic for this thread which should stay focused on Starliner. It's not off topic. The purpose was to decide when Starliner needs to launch, in addition to when it can launch.The dirty little secret is Starliner doesn't need to launch at all, until if/when SpaceX has a mishap*. In fact, it'd be cheaper for it not to launch. SpaceX is building plenty of capsules and the capsules could and should (and probably will be) certified for reuse at some point.
Quote from: abaddon on 06/03/2020 04:40 pmQuote from: Nomadd on 06/03/2020 02:45 pmQuote from: abaddon on 06/02/2020 02:42 pmDM-2 must complete it’s mission before certification and USCV-1. There will be no direct handover.This is also off-topic for this thread which should stay focused on Starliner. It's not off topic. The purpose was to decide when Starliner needs to launch, in addition to when it can launch.The dirty little secret is Starliner doesn't need to launch at all, until if/when SpaceX has a mishap*. In fact, it'd be cheaper for it not to launch. SpaceX is building plenty of capsules and the capsules could and should (and probably will be) certified for reuse at some point.That makes no sense. I don't... think you understand the concept of redundancy. At all. Starliner doesn't provide redundancy until it demonstrates that it works. And it has to fly to do that.
No, I'm not suggesting that's appropriate or possible to only launch when the other provider has a problem, clearly that doesn't work. Just pointing out that SpaceX is capable of filling the crewed need RIGHT NOW to give Boeing and NASA time to get Starliner certified without schedule pressure.
That makes no sense. I don't... think you understand the concept of redundancy. At all. Starliner doesn't provide redundancy until it demonstrates that it works. And it has to fly to do that.
The dirty little secret is Starliner doesn't need to launch at all, until if/when SpaceX has a mishap*. In fact, it'd be cheaper for it not to launch. SpaceX is building plenty of capsules and the capsules could and should (and probably will be) certified for reuse at some point.
Quote from: abaddon on 06/03/2020 04:40 pmThe dirty little secret is Starliner doesn't need to launch at all, until if/when SpaceX has a mishap*. In fact, it'd be cheaper for it not to launch. SpaceX is building plenty of capsules and the capsules could and should (and probably will be) certified for reuse at some point.Recent mod of contract between NASA and SpaceX showed that reuse of BOTH F9 and Crew Dragon will be allowed after USCV-2. That will enable SpaceX for higher flight rate if Boeing is not ready by then.
I’m surprised NASA made a reuse contract change with SpaceX so quickly.Anyone have numbers?Edit: ok it looks like no cost modification
I’m surprised NASA made a reuse contract change with SpaceX so quickly.
You also need to include Boeing costs and all the development costs prior to CCtCAP. I work out that to be $8362.4M for 53 seats (26 for SpaceX and 27 for Boeing).
Quote from: DigitalMan on 06/04/2020 01:37 amI’m surprised NASA made a reuse contract change with SpaceX so quickly.Anyone have numbers?Edit: ok it looks like no cost modificationNo cost modification due to the fact that it is an exchange. Originally DM-2 would last only a week. But given the dire situation with regards to the presence of US astronauts on ISS there was a pressing need to turn DM-2 into a longer mission. In doing so NASA would have to come up with compensation for SpaceX. That could be either additional money or something else.In this case NASA and SpaceX agreed to not provide additional money but to drop the requirement of all-new boosters and all-new Crew Dragon spacecraft for all six contracted Post-Certification Missions.In short: SpaceX gets to fly reused F9 boosters and Crew Dragons on CCP missions in exchange for extending the DM-2 mission from one week to (up to) 119 days.IMO a really good deal.
Quote from: abaddon on 06/03/2020 04:40 pmQuote from: Nomadd on 06/03/2020 02:45 pmQuote from: abaddon on 06/02/2020 02:42 pmDM-2 must complete it’s mission before certification and USCV-1. There will be no direct handover.This is also off-topic for this thread which should stay focused on Starliner. It's not off topic. The purpose was to decide when Starliner needs to launch, in addition to when it can launch.The dirty little secret is Starliner doesn't need to launch at all, until if/when SpaceX has a mishap*. In fact, it'd be cheaper for it not to launch. SpaceX is building plenty of capsules and the capsules could and should (and probably will be) certified for reuse at some point.There really isn't much evidence that SpaceX can reliably provide crew rotation services to keep ISS up and running alone. They were never planning for that and haven't even done one full crew rotation. And re-use likely won't help given the shortest interval between launches of the same Dragon cargo capsule was 459 days (CRS-16 and CRS-20). That would suggest that the DM-2 capsule would be ready for reflight on or after September 1, 2021. So, it won't help with the need for a flight to ISS in the ~March 2021 time frame. For the health of the ISS and not being put in another potential de-crewing situation (and another expedited Soyuz contract situation) , these Starliner flights in November 2020 and April 2021 need to hold.
And re-use likely won't help given the shortest interval between launches of the same Dragon cargo capsule was 459 days (CRS-16 and CRS-20).
There really isn't much evidence that SpaceX can reliably provide crew rotation services to keep ISS up and running alone. They were never planning for that and haven't even done one full crew rotation. And re-use likely won't help...
C. You assume that Crew Dragon will take as long to refurb as Cargo Dragon, which has been retired.
Quote from: ncb1397 on 06/04/2020 04:33 pmThere really isn't much evidence that SpaceX can reliably provide crew rotation services to keep ISS up and running alone. They were never planning for that and haven't even done one full crew rotation. And re-use likely won't help...If NASA needed SpaceX to "reliably provide crew rotation services to keep ISS up and running alone" I have no doubt SpaceX would figure it out. Like 0% doubt.
I was trying to find what Boeing got for extending their mission (see https://www.nasa.gov/feature/nasa-and-boeing-extend-starliner-crew-flight-test-duration-to-space-station-target-new and https://spacenews.com/nasa-approves-extension-of-boeing-commercial-crew-test-flight/), but I couldn't find any reference. It might be that whatever the deal is won't be fully arranged until the duration of the mission is determined, and that hasn't happened yet. Or I couldn't find it. But that would give us an apples to apples comparison as to the value of extending a short-duration flight to a long-duration flight.This feels like a good deal for SpaceX but an even better deal for NASA (and us taxpayers). Boeing was already going to reuse capsules - at a much steeper price, while SpaceX is the one with experience refurbishing and reflying Dragon capsules. And either NASA thinks flying on a SpaceX previously flown booster is as safe or safer than a new booster, or it does not. That doesn't seem like a financial consideration for NASA, strictly a safety assessment.I'm glad to see it happen and think it benefits both SpaceX and NASA. But it this seems great deal for NASA - getting two more seats (estimated anywhere from $55 million to $130 million per seat, depending on which accounting measure you use) for free.