Grand Ship Builder Posted August 24, 2017 Share Posted August 24, 2017 Is the launch escape system affected by the cancellation of propulsive landings? Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted August 24, 2017 Share Posted August 24, 2017 1 hour ago, Grand Ship Builder said: Is the launch escape system affected by the cancellation of propulsive landings? Shouldn't be. Quote Link to comment Share on other sites More sharing options...
tater Posted August 24, 2017 Share Posted August 24, 2017 Quote Link to comment Share on other sites More sharing options...
StupidAndy Posted August 24, 2017 Share Posted August 24, 2017 when is the launch? 2:50 EST? please no, I want to watch it and not be in school Quote Link to comment Share on other sites More sharing options...
RCgothic Posted August 24, 2017 Share Posted August 24, 2017 (edited) 14 hours ago, sevenperforce said: It probably means they tested it to three atmospheres of internal pressure. The stress on a pressure vessel (or, in this case, a pressure suit) is a function of differential pressure, not absolute pressure. In other words, if the inside has one atmosphere of pressure and the outside has zero atmospheres of pressure, that's one atmosphere of differential pressure. If the inside has two atmospheres of pressure and the outside has one atmosphere of pressure, that's still just one atmosphere of differential pressure. Elon meant that the difference between the internal and external pressure, during the test, was twice as much of a pressure differential as being in a hard vacuum. So they probably just pumped up the inside of the suit to three atmospheres; that's the easiest way to do it. Of course, they could have pumped the inside to 2.5 atmospheres and then pumped the outside down to 0.5 atmospheres. Same difference. In terms of pressure differential I'm sure three atmospheres would be fine, but there may be other factors that can only be tested in a near vacuum environment. Edited August 24, 2017 by RCgothic Quote Link to comment Share on other sites More sharing options...
KSK Posted August 24, 2017 Share Posted August 24, 2017 1 hour ago, StupidAndy said: when is the launch? 2:50 EST? please no, I want to watch it and not be in school Any updates on the weather? Not looking too promising from @tater's post. Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted August 24, 2017 Share Posted August 24, 2017 37 minutes ago, RCgothic said: In terms of pressure differential I'm sure three atmospheres would be fine, but there may be other factors that can only be tested in a near vacuum environment. In which case they could well have pumped down the surroundings to near-vacuum and then pumped up the inside of the suit to two atmospheres. Quote Link to comment Share on other sites More sharing options...
tater Posted August 24, 2017 Share Posted August 24, 2017 (edited) 30 minutes ago, KSK said: Any updates on the weather? Not looking too promising from @tater's post. It's always like that at VAFB. Just fog. Edited August 24, 2017 by tater Quote Link to comment Share on other sites More sharing options...
TheEpicSquared Posted August 24, 2017 Share Posted August 24, 2017 Anyone remember Iridium-2? Quote Link to comment Share on other sites More sharing options...
Nightfury Posted August 24, 2017 Share Posted August 24, 2017 (edited) 5 minutes ago, TheEpicSquared said: Anyone remember Iridium-2? Yup, was a foggy launch Tried to watch CRS-12 too, but my mobile internet was not the best Edited August 24, 2017 by Nightfury Quote Link to comment Share on other sites More sharing options...
tater Posted August 24, 2017 Share Posted August 24, 2017 Static fire video (launch in under 6 hours): stream vid: Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted August 24, 2017 Share Posted August 24, 2017 Ugh, that fog looks delicious. I'd settle for any kind of moisture here. IIRC, it was a foggy launch like this that led to one of the landing failures, ice in the landing gear mechanism or the like. Have they remedied that vulnerability yet? Quote Link to comment Share on other sites More sharing options...
Silavite Posted August 24, 2017 Share Posted August 24, 2017 3 minutes ago, CatastrophicFailure said: Ugh, that fog looks delicious. I'd settle for any kind of moisture here. IIRC, it was a foggy launch like this that led to one of the landing failures, ice in the landing gear mechanism or the like. Have they remedied that vulnerability yet? Perhaps you should drop by south east Texas, then. The facility in Brownsville better be built hurricane proof. (Yes, I know Harvey is only a tropical storm right now, and yes, I know it's supposed to hit North of Brownsville, but just sayin'.) Anywho, the launch window ends one minute before I get out of school. Curses, foiled again... Quote Link to comment Share on other sites More sharing options...
tater Posted August 24, 2017 Share Posted August 24, 2017 21 minutes ago, Silavite said: Anywho, the launch window ends one minute before I get out of school. Curses, foiled again... My son finishes lunch at 12:50 (launch time here in Mountain states), and he was gonna ask his teacher to miss 10 min of recess and pull it up on the TV in the classroom. Quote Link to comment Share on other sites More sharing options...
tater Posted August 24, 2017 Share Posted August 24, 2017 Quote Link to comment Share on other sites More sharing options...
tater Posted August 24, 2017 Share Posted August 24, 2017 Music up on livestream. Quote Link to comment Share on other sites More sharing options...
Racescort666 Posted August 24, 2017 Share Posted August 24, 2017 1 minute ago, tater said: Music up on livestream. They're taking their sweet time about starting the broadcast though. Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted August 24, 2017 Share Posted August 24, 2017 Looks like all systems go! Liftoff!!!!! Quote Link to comment Share on other sites More sharing options...
TheEpicSquared Posted August 24, 2017 Share Posted August 24, 2017 We have liftoff! Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted August 24, 2017 Share Posted August 24, 2017 (edited) Just tuned in, saw a big cloud coming at the camera. Edited August 24, 2017 by CatastrophicFailure Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted August 24, 2017 Share Posted August 24, 2017 2 minutes ago, CatastrophicFailure said: Just tuned in, saw a big cloud coming at the camera. Yeah, that scared me too. Just a wind change, though. Coming up on MECO. This is an ASDS landing. Quote Link to comment Share on other sites More sharing options...
tater Posted August 24, 2017 Share Posted August 24, 2017 MECO. Quote Link to comment Share on other sites More sharing options...
insert_name Posted August 24, 2017 Share Posted August 24, 2017 Meco and stage separation Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted August 24, 2017 Share Posted August 24, 2017 Stage separation and MVac ignition. Really, really beautiful shot of MVac ignition from underneath. Looks like it is running the older grid fins -- probably recycled from an earlier launch? This is a new booster but they can reuse grid fins. S2 telemetry rather than S1. Quote Link to comment Share on other sites More sharing options...
DVDRW Posted August 24, 2017 Share Posted August 24, 2017 So titanium grid fins only for GTO launches? Quote Link to comment Share on other sites More sharing options...
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