tomf Posted April 17, 2023 Share Posted April 17, 2023 After a scrub line this are they venting the methane/oxygen or are they able to pump most of it back into the storage tanks? Quote Link to comment Share on other sites More sharing options...
tater Posted April 17, 2023 Share Posted April 17, 2023 Try again the 19th is what I’m hearing. Quote Link to comment Share on other sites More sharing options...
magnemoe Posted April 17, 2023 Share Posted April 17, 2023 (edited) 32 minutes ago, Elthy said: Did SpaceX say anything about the "payload" of this starship? I think flying it empty could mess up the launch profile, as the acceleration would be way higher and they end up with lots of extra fuel, which would mess up the reentry... No payload, but its probably heavier than final version. weight balance will differ between ships anyway so you either have to have upper and lower header tanks or just use the flaps to compensate. between ships anyway so you either have to have upper and lower header tanks or just use the flaps to compensate. Edited April 17, 2023 by magnemoe Quote Link to comment Share on other sites More sharing options...
mikegarrison Posted April 17, 2023 Share Posted April 17, 2023 38 minutes ago, tomf said: After a scrub line this are they venting the methane/oxygen or are they able to pump most of it back into the storage tanks? I think they at least try to recapture the methane. I certainly hope so, anyway. It's an extremely potent greenhouse gas, so just dumping a huge tank of it would be a big no-no environmentally. Oxygen is no big deal, as long as you don't dump it all at once, because that's obviously a fire/explosion hazard. Quote Link to comment Share on other sites More sharing options...
magnemoe Posted April 17, 2023 Share Posted April 17, 2023 2 hours ago, AVaughan said: Assuming you have a decent clock and decent optics, then measuring the position of the Earth/Moon/Venus/Mars/Jupiter/Saturn against the stars should be enough to triangulate your position. (You can also cross-check and calibrate your IGU's orientation against the stars the same way). This gives your orientation, not your position unless you watch over time. However interplanetary space is not very crowded, yet. Orientation it the critical one for pointing solar panels and antennas. But you can simply use earth stations and note how you and earth move. Quote Link to comment Share on other sites More sharing options...
AVaughan Posted April 17, 2023 Share Posted April 17, 2023 41 minutes ago, magnemoe said: This gives your orientation, not your position unless you watch over time. However interplanetary space is not very crowded, yet. Orientation it the critical one for pointing solar panels and antennas. But you can simply use earth stations and note how you and earth move. Noting the location of a celestial body against the stars gives you more than orientation. Each such observation gives you a vector from that body to your position at that time. Two or more simultaneous observations of different celestial bodies in different areas of the sky should give you a point where the vectors intersect (or their closest approach to each other, since no measurement is error free). Quote Link to comment Share on other sites More sharing options...
AtomicTech Posted April 17, 2023 Share Posted April 17, 2023 1 hour ago, tater said: Try again the 19th is what I’m hearing. Source? Quote Link to comment Share on other sites More sharing options...
tater Posted April 17, 2023 Share Posted April 17, 2023 3 minutes ago, AtomicTech said: Source? Personal communication Quote Link to comment Share on other sites More sharing options...
JoeSchmuckatelli Posted April 17, 2023 Share Posted April 17, 2023 Should have gone with the 7th grade sleepover favorite "weegee board"! Yes I know how it's spelt Quote Link to comment Share on other sites More sharing options...
AtomicTech Posted April 17, 2023 Share Posted April 17, 2023 2 minutes ago, tater said: Personal communication Just now, JoeSchmuckatelli said: Should have gone with the 7th grade sleepover favorite "weegee board"! Yes I know how it's spelt Quote Link to comment Share on other sites More sharing options...
KSK Posted April 17, 2023 Share Posted April 17, 2023 A genuine Weegee board would have a bottle of rotgut moving around and pointing to the letters. Most commonly used letters, in no special order are U, F, K, and C. For those that don’t know, a Weegee is one local nickname for a Glaswegian, or somebody hailing from the fair Scottish city of Glasgow. Surprisingly, it’s not a particularly insulting nickname. Quote Link to comment Share on other sites More sharing options...
cubinator Posted April 17, 2023 Share Posted April 17, 2023 54 minutes ago, tater said: 57 minutes ago, AtomicTech said: Source? Personal communication They also said as much in the live stream, 48 hour recycle time. Quote Link to comment Share on other sites More sharing options...
tater Posted April 17, 2023 Share Posted April 17, 2023 (edited) Well, NASA has some interest in what's going on. Also: 1 hour ago, JoeSchmuckatelli said: Should have gone with the 7th grade sleepover favorite "weegee board"! Spoiler Edited April 17, 2023 by tater Quote Link to comment Share on other sites More sharing options...
mikegarrison Posted April 17, 2023 Share Posted April 17, 2023 22 minutes ago, cubinator said: They also said as much in the live stream, 48 hour recycle time. "Recycle time" is a minimum. It's not necessarily the case that they will try again ASAP. Quote Link to comment Share on other sites More sharing options...
tater Posted April 17, 2023 Share Posted April 17, 2023 (edited) <snip> Edited April 18, 2023 by Geonovast Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted April 17, 2023 Share Posted April 17, 2023 Now this one I’m getting up early for… Quote Link to comment Share on other sites More sharing options...
SunlitZelkova Posted April 17, 2023 Share Posted April 17, 2023 This is the second time I have slept in and been saved by a scrub. The first time was when I nearly missed the launch of Demo-2 but was saved by the scrub. Quote Link to comment Share on other sites More sharing options...
Nuke Posted April 17, 2023 Share Posted April 17, 2023 (edited) yea it was around 5:30 am when i realized the launch was today, but i hadn't slept yet so i went to bed. looks like i didnt miss much. Edited April 17, 2023 by Nuke Quote Link to comment Share on other sites More sharing options...
tater Posted April 17, 2023 Share Posted April 17, 2023 Quote Link to comment Share on other sites More sharing options...
AtomicTech Posted April 17, 2023 Share Posted April 17, 2023 (edited) 21 hours ago, tater said: <snip> They'd better! Edited April 18, 2023 by Geonovast Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted April 17, 2023 Share Posted April 17, 2023 4 hours ago, Elthy said: Did SpaceX say anything about the "payload" of this starship? I think flying it empty could mess up the launch profile, as the acceleration would be way higher and they end up with lots of extra fuel, which would mess up the reentry... The fully loaded Starship + Superheavy is over 5,000 tonnes. The impact of having or not having a 100-150 tonne payload will be an acceleration difference of 2%. Negligible. 3 hours ago, mikegarrison said: 4 hours ago, tomf said: After a scrub line this are they venting the methane/oxygen or are they able to pump most of it back into the storage tanks? I think they at least try to recapture the methane. I certainly hope so, anyway. It's an extremely potent greenhouse gas, so just dumping a huge tank of it would be a big no-no environmentally. Oxygen is no big deal, as long as you don't dump it all at once, because that's obviously a fire/explosion hazard. Oh, they pump everything they can back into the tanks. Both LOX and methane. Quote Link to comment Share on other sites More sharing options...
mikegarrison Posted April 17, 2023 Share Posted April 17, 2023 9 minutes ago, sevenperforce said: The fully loaded Starship + Superheavy is over 5,000 tonnes. The impact of having or not having a 100-150 tonne payload will be an acceleration difference of 2%. Negligible. Only at the time of launch. The payload becomes a bigger and bigger fraction of the total mass as the propellant is burned off and the stages are dropped. Quote Link to comment Share on other sites More sharing options...
Spaceception Posted April 18, 2023 Share Posted April 18, 2023 New stream https://www.youtube.com/live/-1wcilQ58hI?feature=share Quote Link to comment Share on other sites More sharing options...
tater Posted April 18, 2023 Share Posted April 18, 2023 I think they typoed the 62 minute launch window. Quote Link to comment Share on other sites More sharing options...
tater Posted April 18, 2023 Share Posted April 18, 2023 This image from one of the premade vids this morning was pretty cool: Trying to make it less 'splodey Quote Link to comment Share on other sites More sharing options...
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