That's what makes them money: making it about Musk.
Can someone just clarify -- does the vehicle on the pad use helium pressurization only on the ground for initial filling or is it on the vehicle overall?
Quote from: kdhilliard on 04/17/2023 01:03 amQuote from: ChrisC on 04/17/2023 12:29 amOh god NOOOO it's baaaaack, and with untrimmed quotes Hahahaha!Not to flog that semantic dead horse, but as far as I've seen, no one here has offered a calculation showing a possible post-SECO trajectory which intersects Earth's surface when calculated without taking atmosphere drag into account (given the expected SECO altitude, approximate apogee, and reentry location).In lieu of that, I'm trusting Jonathan McDowell:https://twitter.com/planet4589/status/1647321808658395136https://twitter.com/planet4589/status/1647324115819278337Quote from: Rand Simberg · @Simberg_Space & Jonathan McDowell · @planet4589 · 19:29 UTC · Apr 15, 2023Rand Simberg: Has SpaceX provided a planned trajectory?Jonathan McDowell: No, but there are enough clues in the NOTAMs, the timelines, and some FAA statements to infer one.Simberg: To what degree of precision? (And accuracy)?McDowell: perigee is between 40 and 60 km with fairly high confidence.apogee is between 200 and 245 km. inclination is 26.3 +- 0.1 deg.OK, edited to prod the dead horse *only slightly* by reporting without comment McDowell's choice of terminology:https://twitter.com/planet4589/status/1647649762722603008Quote from: Jonathan McDowell · @planet4589 · 1:14 PM · Apr 16, 2023No, I would say it will be "marginally orbital". For true orbital, I require perigee > 80 km.It's not "marginally orbital", it's "the most massive test hop, ever". Cheers, Martin
Quote from: ChrisC on 04/17/2023 12:29 amOh god NOOOO it's baaaaack, and with untrimmed quotes Hahahaha!Not to flog that semantic dead horse, but as far as I've seen, no one here has offered a calculation showing a possible post-SECO trajectory which intersects Earth's surface when calculated without taking atmosphere drag into account (given the expected SECO altitude, approximate apogee, and reentry location).In lieu of that, I'm trusting Jonathan McDowell:https://twitter.com/planet4589/status/1647321808658395136https://twitter.com/planet4589/status/1647324115819278337Quote from: Rand Simberg · @Simberg_Space & Jonathan McDowell · @planet4589 · 19:29 UTC · Apr 15, 2023Rand Simberg: Has SpaceX provided a planned trajectory?Jonathan McDowell: No, but there are enough clues in the NOTAMs, the timelines, and some FAA statements to infer one.Simberg: To what degree of precision? (And accuracy)?McDowell: perigee is between 40 and 60 km with fairly high confidence.apogee is between 200 and 245 km. inclination is 26.3 +- 0.1 deg.OK, edited to prod the dead horse *only slightly* by reporting without comment McDowell's choice of terminology:https://twitter.com/planet4589/status/1647649762722603008Quote from: Jonathan McDowell · @planet4589 · 1:14 PM · Apr 16, 2023No, I would say it will be "marginally orbital". For true orbital, I require perigee > 80 km.
Oh god NOOOO it's baaaaack, and with untrimmed quotes
Rand Simberg: Has SpaceX provided a planned trajectory?Jonathan McDowell: No, but there are enough clues in the NOTAMs, the timelines, and some FAA statements to infer one.Simberg: To what degree of precision? (And accuracy)?McDowell: perigee is between 40 and 60 km with fairly high confidence.apogee is between 200 and 245 km. inclination is 26.3 +- 0.1 deg.
No, I would say it will be "marginally orbital". For true orbital, I require perigee > 80 km.
Quote from: StevenOBrien on 04/17/2023 11:42 amMission control audio feed https://youtube.com/watch?v=Ln8hXptcA90Did anyone actually hear anything on that loop? I scrubbed to a few random points during the countdown and never heard anything. I was going to listen all the way through later today, but they've now taken that video private.
Mission control audio feed https://youtube.com/watch?v=Ln8hXptcA90
Quote from: Lijazos on 04/17/2023 08:33 pmHey. I'm finding it hard to get accurate answers about this. In this tweet, Zack Golden mentions that this many LN2/LOX/CH4 tankers are needed to replenish the Tank Farm after this kind of WDR. https://twitter.com/CSI_Starbase/status/1647953241001345025Is it accurate in any way? One would think they wouldn't need as much CH4.I have the same question. Where did the propellant go that was in the Starship and Booster tanks at the time of the scrub? Some (most I would expect) gets recycled into the tanks? Or not? My assumption is it would, so they only need to replenish what was lost due to venting, right?Or did they really vent the whole content in Starship and Booster?
Hey. I'm finding it hard to get accurate answers about this. In this tweet, Zack Golden mentions that this many LN2/LOX/CH4 tankers are needed to replenish the Tank Farm after this kind of WDR. https://twitter.com/CSI_Starbase/status/1647953241001345025Is it accurate in any way? One would think they wouldn't need as much CH4.
Quote from: GmP on 04/17/2023 09:00 pmQuote from: Lijazos on 04/17/2023 08:33 pmHey. I'm finding it hard to get accurate answers about this. In this tweet, Zack Golden mentions that this many LN2/LOX/CH4 tankers are needed to replenish the Tank Farm after this kind of WDR. https://twitter.com/CSI_Starbase/status/1647953241001345025Is it accurate in any way? One would think they wouldn't need as much CH4.I have the same question. Where did the propellant go that was in the Starship and Booster tanks at the time of the scrub? Some (most I would expect) gets recycled into the tanks? Or not? My assumption is it would, so they only need to replenish what was lost due to venting, right?Or did they really vent the whole content in Starship and Booster?Reviving this question, haven't seen a good answer.Why would it require more than a handful of trucks to replenish after a WDR?
Quote from: Herb Schaltegger on 04/17/2023 07:39 pmQuote from: cplchanb on 04/17/2023 07:27 pmwell regardless of whether its actually broken or frozen shut, the fact is that it failed to operate when commanded which means theres a fault to it, hence a faulty valve.No engineer in the world, especially an aerospace engineer, would describe a frozen valve as “faulty” absent a physical fault preventing actuation (a condition for which we have zero evidence).What description would an aerospace engineer use to describe such a situation? I'm genuinely curious, and nothing is coming directly to my mind, but then again, I am not an aerospace engineer. Disabled? Inoperative? Malfunctioning? These all seem to have their own subtle connotation as well which I think rules them out just as well as 'faulty'.
Quote from: cplchanb on 04/17/2023 07:27 pmwell regardless of whether its actually broken or frozen shut, the fact is that it failed to operate when commanded which means theres a fault to it, hence a faulty valve.No engineer in the world, especially an aerospace engineer, would describe a frozen valve as “faulty” absent a physical fault preventing actuation (a condition for which we have zero evidence).
well regardless of whether its actually broken or frozen shut, the fact is that it failed to operate when commanded which means theres a fault to it, hence a faulty valve.
Quote from: RDMM2081 on 04/17/2023 07:46 pmQuote from: Herb Schaltegger on 04/17/2023 07:39 pmQuote from: cplchanb on 04/17/2023 07:27 pmwell regardless of whether its actually broken or frozen shut, the fact is that it failed to operate when commanded which means theres a fault to it, hence a faulty valve.No engineer in the world, especially an aerospace engineer, would describe a frozen valve as “faulty” absent a physical fault preventing actuation (a condition for which we have zero evidence).What description would an aerospace engineer use to describe such a situation? I'm genuinely curious, and nothing is coming directly to my mind, but then again, I am not an aerospace engineer. Disabled? Inoperative? Malfunctioning? These all seem to have their own subtle connotation as well which I think rules them out just as well as 'faulty'.Faulty is not such a bad adjective.It was the valve that didn't work.The reason may have been transient, the fault may have been intermittent, the design itself (valve, enclosure procedure) is lacking or deficient since it allowed a fault to develop under normal operating conditions.Contrast that with a valve that failed because a forklift drove over it. In that case, it wouldn't be faulty.
Anything sacred about 7 am, as opposed to 9 am?
Today’s #satellite image (April 17, 2023) of the @SpaceX Boca Chica launch facilities in Texas with a view of the #Starship and Super Heavy rocket on the launch pad. Today’s scheduled launch of the most powerful rocket ever constructed was scrubbed. Stay tuned! 🚀
Is it me or has bickering about semantics become a trend here? With what "faulty" means, how long 48 hours is, what "orbital" means, and others, going on for pages and pages, it feels like being trolled.
In the attached screengrab from engineering cameras under the booster in the OLM I see what appears to be frosted tubing extending from the launch mount to each engine. They are put in after the explosion in December and are not part of the LN2 stage zero connectors for engine spin-up. What are these for? Are they directly connected to each engine and how are they disconnected at launch or do they just tear off at launch?
Quote from: catdlr on 04/18/2023 07:34 amIn the attached screengrab from engineering cameras under the booster in the OLM I see what appears to be frosted tubing extending from the launch mount to each engine. They are put in after the explosion in December and are not part of the LN2 stage zero connectors for engine spin-up. What are these for? Are they directly connected to each engine and how are they disconnected at launch or do they just tear off at launch?Those are flex lines and are torn off at launch. Temporary thing. This only applies to B7. On B9 et al. a different solution is applied.