tater Posted July 17, 2019 Share Posted July 17, 2019 The bocachicagal pics on NSF this morning (she just took them) look fine, lol. Quote Link to comment Share on other sites More sharing options...
Wjolcz Posted July 17, 2019 Share Posted July 17, 2019 1 minute ago, tater said: The bocachicagal pics on NSF this morning (she just took them) look fine, lol. Some parts of that thing are supposed to withstand reentry heating so I'd guess most of the hopper is OK. Don't know about the engine though. If it was some sort of leak it wouldn't be flying any time soon even if there was no fire. Quote Link to comment Share on other sites More sharing options...
Guest Posted July 17, 2019 Share Posted July 17, 2019 Elon would have had a busy night, he was doing this as well... Spoiler https://www.youtube.com/watch?v=r-vbh3t7WVI&app=desktop It don’t start till somewhere the middle of the vid. Super interesting though! I don’t know if I would be able to let a robot sewing machine sew my brain D: but looks interesting!!! Quote Link to comment Share on other sites More sharing options...
NSEP Posted July 17, 2019 Share Posted July 17, 2019 (edited) Im pretty sure Starhopper was pretty cold because it was storing cryogenic fluids during the fire, so i think that might have helped protected it from the heat. Edited July 17, 2019 by NSEP Quote Link to comment Share on other sites More sharing options...
Wjolcz Posted July 17, 2019 Share Posted July 17, 2019 40 minutes ago, NSEP said: Im pretty sure Starhopper was pretty cold because it was storing cryogenic fluids during the fire, so i think that might have helped protected it from the heat. But then there's thermal expansion/stretching. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted July 17, 2019 Share Posted July 17, 2019 Off-nominal. Off-nominal indeed, this ain't good: Quote Link to comment Share on other sites More sharing options...
tater Posted July 17, 2019 Share Posted July 17, 2019 Quote Link to comment Share on other sites More sharing options...
NSEP Posted July 17, 2019 Share Posted July 17, 2019 15 minutes ago, CatastrophicFailure said: Off-nominal. Off-nominal indeed, this ain't good: They definitely need some time to investigate and do some fixing so it won't happen again, so it makes sense why would withdraw all the testing this week. If there is little damage i don't expect it take more than a month, but we will see. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted July 17, 2019 Share Posted July 17, 2019 4 minutes ago, NSEP said: They definitely need some time to investigate and do some fixing so it won't happen again, so it makes sense why would withdraw all the testing this week. If there is little damage i don't expect it take more than a month, but we will see. Just S-uming here, but I would think damage would be light, if anything, also assuming nothing, ahem, catastrophically failed. The whole thing is stainless steel, so pretty flame-resistant, and there's presumably a fair amount of thermal shielding on any wiring, since even during a not-off-nominal event, it gets pretty flamey around the StarHopper's posterior. That, and the fire was short lived. Quote Link to comment Share on other sites More sharing options...
NSEP Posted July 17, 2019 Share Posted July 17, 2019 (edited) 33 minutes ago, CatastrophicFailure said: Just S-uming here, but I would think damage would be light, if anything, also assuming nothing, ahem, catastrophically failed. The whole thing is stainless steel, so pretty flame-resistant, and there's presumably a fair amount of thermal shielding on any wiring, since even during a not-off-nominal event, it gets pretty flamey around the StarHopper's posterior. That, and the fire was short lived. Maybe there is a slight chance that these kind of fires would become a signature of Starship, rather than a problem, kind of like the Delta-IV. Imagine a monolithic monstrous gigantic humongous shining metallic rocket that graciously emerges from a colossal fireball, that would be an epic sight, i would happily fly over to the US just to see that. (if its safe and doesn't destory the rocket or toast the people inside, obviously) EDIT: Screw it, i just so happen to be working on a Sci-Fi comic, and my rockets are going to have this effect. Its just sounds so darned epic. Edited July 17, 2019 by NSEP Quote Link to comment Share on other sites More sharing options...
tater Posted July 17, 2019 Share Posted July 17, 2019 Was after the static fire, so maybe GSE related (pretty rigged up pad, after all). Quote Link to comment Share on other sites More sharing options...
NSEP Posted July 17, 2019 Share Posted July 17, 2019 (edited) 7 minutes ago, tater said: Was after the static fire, so maybe GSE related (pretty rigged up pad, after all). Very likely. I think that some Methane may have leaked out when the hopper popped of the umbilical cord connector, kind of like when you open a bottle of soda that is pressurised, but instead of soda, its evaporating liquid methane. Edited July 17, 2019 by NSEP Quote Link to comment Share on other sites More sharing options...
tater Posted July 17, 2019 Share Posted July 17, 2019 Quote Link to comment Share on other sites More sharing options...
tater Posted July 17, 2019 Share Posted July 17, 2019 missed this last night: Quote Link to comment Share on other sites More sharing options...
mikegarrison Posted July 17, 2019 Share Posted July 17, 2019 5 hours ago, Wjolcz said: Some parts of that thing are supposed to withstand reentry heating so I'd guess most of the hopper is OK. I would be very surprised if any part of that test article was intended to survive re-entry heating. Quote Link to comment Share on other sites More sharing options...
Wjolcz Posted July 17, 2019 Share Posted July 17, 2019 (edited) 47 minutes ago, mikegarrison said: I would be very surprised if any part of that test article was intended to survive re-entry heating. Well, my phrasing wasn't exactly what I was trying to convey. And then I rethought what I wrote. What I was trying to say is that the materials and/or the main frame should be fine (because they are similar enough to the orbital prototype) after a fire like that. But then I remembered about heat expansion. Also, I don't know what kind of temperatures might have been involved but if I had to guess they definitely were much lower than reentry heating (not to mention the pressures involved). I kind of want to see that thing hover at least. Edited July 17, 2019 by Wjolcz Quote Link to comment Share on other sites More sharing options...
tater Posted July 17, 2019 Share Posted July 17, 2019 2 hours ago, mikegarrison said: I would be very surprised if any part of that test article was intended to survive re-entry heating. Yeah, that's not a thing. It is designed to withstand a rocket engine, however, and apparently did, twice now, and the subsequent fire around it. Quote Link to comment Share on other sites More sharing options...
magnemoe Posted July 17, 2019 Share Posted July 17, 2019 4 hours ago, NSEP said: Very likely. I think that some Methane may have leaked out when the hopper popped of the umbilical cord connector, kind of like when you open a bottle of soda that is pressurised, but instead of soda, its evaporating liquid methane. Yes, it could also be one of the engines not shutting down methane flow fast enough. To me it looked like it was an fire on the top part to before the fireball? 2 hours ago, Wjolcz said: Well, my phrasing wasn't exactly what I was trying to convey. And then I rethought what I wrote. What I was trying to say is that the materials and/or the main frame should be fine (because they are similar enough to the orbital prototype) after a fire like that. But then I remembered about heat expansion. Also, I don't know what kind of temperatures might have been involved but if I had to guess they definitely were much lower than reentry heating (not to mention the pressures involved). I kind of want to see that thing hover at least. And that fireball would probably damage stuff, yes hull is steel and the engine body is also metal, but not all the electronic and hydraulic systems. Your car is mostly steel so can I dump a liter of glassiness on it and lit it Well for starship I would add an floor at or below the narrow par of the surface engines, this will protect the vulnerable upper part of engines, multiple ways to protect the gap because of gimbal. This would help against environment, fire also stuff like hot staging during an abort, landings and accidents. Yes it would make leaks in the engines more of an issue. But it would make servicing easier, just make sure you can enter with an spacesuit Quote Link to comment Share on other sites More sharing options...
AVaughan Posted July 18, 2019 Share Posted July 18, 2019 15 hours ago, tater said: So I compared that to the figures I get based on the assumptions I used in https://forum.kerbalspaceprogram.com/index.php?/topic/159887-spacex-discussion-thread/&do=findComment&comment=3600985 and https://forum.kerbalspaceprogram.com/index.php?/topic/159887-spacex-discussion-thread/&do=findComment&comment=3601019. Using the same assumptions, (dry mass 75 tons, payload 100 tons, fully fueled mass 1100 tons, ISP 380) I get a dV of 6850m/s. If I bump the fully fueled mass up to 1115 then I get 6900m/s. (Of course Elon only specified 2 significant figures, and 6850m/s would round to 6.9km/s). But this agrees well enough with my calculated figures that the assumptions in those two posts look reasonable. Quote Link to comment Share on other sites More sharing options...
Nightside Posted July 18, 2019 Share Posted July 18, 2019 23 hours ago, Dale Christopher said: Elon would have had a busy night, he was doing this as well... Reveal hidden contents https://www.youtube.com/watch?v=r-vbh3t7WVI&app=desktop It don’t start till somewhere the middle of the vid. Super interesting though! I don’t know if I would be able to let a robot sewing machine sew my brain D: but looks interesting!!! It’s no problem, he’s multithreaded now. Quote Link to comment Share on other sites More sharing options...
Flying dutchman Posted July 18, 2019 Share Posted July 18, 2019 I believe there has just been a new static fire w.o. the fireball. Saw it on a yt video from lapadre. Or i could be wrong. Let's see what the experts have to say Quote Link to comment Share on other sites More sharing options...
tater Posted July 18, 2019 Share Posted July 18, 2019 https://time.com/5628572/elon-musk-moon-landing/?xid=tcoshare Quote Link to comment Share on other sites More sharing options...
Ignath Posted July 18, 2019 Share Posted July 18, 2019 Quote Link to comment Share on other sites More sharing options...
tater Posted July 18, 2019 Share Posted July 18, 2019 11 minutes ago, Flying dutchman said: I believe there has just been a new static fire w.o. the fireball. Saw it on a yt video from lapadre. Or i could be wrong. Let's see what the experts have to say I popped on the YT starship watcher cameras and there are scissor lifts next to Hopper, no way they fired it. Also, I thought they pulled the road closures. Quote Link to comment Share on other sites More sharing options...
NSEP Posted July 18, 2019 Share Posted July 18, 2019 4 hours ago, Flying dutchman said: I believe there has just been a new static fire w.o. the fireball. Saw it on a yt video from lapadre. Or i could be wrong. Let's see what the experts have to say The video Labpadre posted was just an upload of one of the tests. I think i read somewhere that there were 2 static fires on July 16th, but im not sure about that. Quote Link to comment Share on other sites More sharing options...
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