Racescort666 Posted October 12, 2017 Share Posted October 12, 2017 1 minute ago, CatastrophicFailure said: It was probably a subtle sequence of winks and nods, since we all knew it was coming. Like about 2:45 into this. I predict we’ll see a static fire before the end of the year, but flight will be January. Maybe we should start a pool on this... I figured it was coming as well but I was wondering when the official word came down. I seem to remember some discussion of it back around OTV-5 because I thought OTV-5 was going to be the last launch from 39A. I would be in on a pool. I'll say Late Jan 2018. Quote Link to comment Share on other sites More sharing options...
Nibb31 Posted October 12, 2017 Share Posted October 12, 2017 5 hours ago, Mighty1 said: Si, they have recover the fairings. What is the method of recovery. Just fish them out of the ocean or is it spectacular mid air helicopter fishing? The plan is to add parachutes and just fish them out. Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted October 12, 2017 Share Posted October 12, 2017 1 hour ago, Nibb31 said: The plan is to add parachutes and just fish them out. And land them on giant bouncy castles eventually. Also the reddit AMA is going to be this weekend, except I'm going to be away this weekend. If any of you are online at the time of the AMA, could you ask Elon if SpaceX has talked to NASA about recovering the ISS using the BFR for study and use as a museum piece? Quote Link to comment Share on other sites More sharing options...
tater Posted October 12, 2017 Share Posted October 12, 2017 Any "bouncy castle" would likely be attached to the fairing, I think. Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted October 12, 2017 Share Posted October 12, 2017 1 minute ago, tater said: Any "bouncy castle" would likely be attached to the fairing, I think. Hmm, that's also a way to go. Now that I think about it, they mentioned a bouncy castle but didn't say where it would be... Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted October 12, 2017 Share Posted October 12, 2017 7 minutes ago, Ultimate Steve said: And land them on giant bouncy castles eventually. Also the reddit AMA is going to be this weekend, except I'm going to be away this weekend. If any of you are online at the time of the AMA, could you ask Elon if SpaceX has talked to NASA about recovering the ISS using the BFR for study and use as a museum piece? Interesting, if unlikely, idea. And they’d better go after the Hubble first. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted October 13, 2017 Share Posted October 13, 2017 (edited) 7 hours ago, Nibb31 said: The plan is to add parachutes and just fish them out. So disappointing. They should be equipped with minijets and landing gears and land as a plane. P.S. Btw, aren't they going to collect the exhaust gases of Falcon into a special bag behind the rocket to refurbish them as a fuel? Edited October 13, 2017 by kerbiloid Quote Link to comment Share on other sites More sharing options...
TheEpicSquared Posted October 13, 2017 Share Posted October 13, 2017 6 hours ago, Ultimate Steve said: And land them on giant bouncy castles eventually. Also the reddit AMA is going to be this weekend, except I'm going to be away this weekend. If any of you are online at the time of the AMA, could you ask Elon if SpaceX has talked to NASA about recovering the ISS using the BFR for study and use as a museum piece? Do you know what time? I might be able to Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted October 13, 2017 Share Posted October 13, 2017 7 hours ago, TheEpicSquared said: Do you know what time? I might be able to No, unfortunately Elon was a little vague in his two word twitter post... Thanks, though! Quote Link to comment Share on other sites More sharing options...
TheEpicSquared Posted October 13, 2017 Share Posted October 13, 2017 8 minutes ago, Ultimate Steve said: No, unfortunately Elon was a little vague in his two word twitter post... Thanks, though! No problem! I’m happy to help Quote Link to comment Share on other sites More sharing options...
.50calBMG Posted October 13, 2017 Share Posted October 13, 2017 Does anyone know when they will go back to the titanium grid fins? I know they wanted to use up their stockpile of aluminum ones before they made the switch, but the one landing they did with them was crystal clear, which makes me think that it was burning paint flaking off onto the camera instead of engine soot. Quote Link to comment Share on other sites More sharing options...
tater Posted October 13, 2017 Share Posted October 13, 2017 Block 5 gets them. Maybe some other cores at some point in the future. Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted October 13, 2017 Share Posted October 13, 2017 @TheEpicSquared Due to a fantastic change of events, I'm no longer going camping this weekend, so hopefully I'll be able to participate in the AMA! I suggest we both keep an eye on reddit, though, because knowing me I'll manage to be busy... Quote Link to comment Share on other sites More sharing options...
Racescort666 Posted October 13, 2017 Share Posted October 13, 2017 @Ultimate Steve, I don't have a reddit account but would you consider asking if SpaceX considers BFS a viable vehicle for cleaning up space debris? ULA is considering the implications of a 1 up 1 down policy for future vehicles and it seems like BFS would be perfect for such capability. It's gotta pay the bills after all, right? Quote Link to comment Share on other sites More sharing options...
Rakaydos Posted October 14, 2017 Share Posted October 14, 2017 22 hours ago, kerbiloid said: Btw, aren't they going to collect the exhaust gases of Falcon into a special bag behind the rocket to refurbish them as a fuel? You joke, but Elon mentioned using the Sabitier reaction on earth to fuel the BFR with carbon neutral methane. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted October 14, 2017 Share Posted October 14, 2017 24 minutes ago, Rakaydos said: You joke, but Elon mentioned using the Sabitier reaction on earth to fuel the BFR with carbon neutral methane. Getting hydrogen from where? Quote Link to comment Share on other sites More sharing options...
tater Posted October 14, 2017 Share Posted October 14, 2017 Water. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted October 14, 2017 Share Posted October 14, 2017 (edited) Getting energy by burning the natural methane or spending the natural methane while making (and then utilizing) solar panels? Edited October 14, 2017 by kerbiloid Quote Link to comment Share on other sites More sharing options...
Rakaydos Posted October 14, 2017 Share Posted October 14, 2017 4 minutes ago, kerbiloid said: Getting energy by burning the natural methane or spending the natural methane while making (and then utilizing) solar panels? probably solar, though theres a lot of wind energy in the texas grid... also, it's creating methane, not burning it. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted October 14, 2017 Share Posted October 14, 2017 (edited) Let me see... H2 burning in O2 gives ~140 MJ/kg of H2. Water = H2O = 9 times heavier than the contained hydrogen. So, looks like the water dissociation takes ~140*9 = 1260 MJ/kg of water. (If don't take into account wastes.) 1260 MJ = 1260 / 50 = 25 kg of methane. So, looks electrolysis of 1 kg of water requires as much energy as at least 25 kg of methane can give. (Including wastes, several times more) Global warming likes this. Solar panels don't appear itself, they need pure silicon which, afaik is made of silane (SiH4). To get silane you should solve metal silicides with an acid. To produce silicides hydrogen is required and spent. Acids also must be created, which requires energy. When the solar panel is depleted, you have to utilize it, and this also requires energy and so on, so solar energetics is still a percent-like part of total energetics. Using natural methane looks more harmless for the atmosphere. Edited October 14, 2017 by kerbiloid Quote Link to comment Share on other sites More sharing options...
Rakaydos Posted October 14, 2017 Share Posted October 14, 2017 1 minute ago, kerbiloid said: Let me see... H2 burning in O2 gives ~140 MJ/kg of H2. Water = H2O = 9 times heavier than the contained hydrogen. So, looks like the water dissociation takes ~140*9 = 1260 MJ/kg of water. (If don't take into account wastes.) 1260 MJ = 1260 / 50 = 25 kg of methane. So, looks electrolysis of 1 kg of water requires as much energy as at least 25 kg of methane can give. (Including wastes, several times more) Global warming likes this. Solar panels don't appear itself, they need pure silicon which, afaik is made of silane (SiH4). To get silane you should solve metal silicides with an acid. To produce silicides hydrogen is required and spent. Acids also must be created, which requires energy. When the solar panel is depleted, you have to utilize it, and this also requires energy and so on, so solar energetics is still a percent-like part of total energetics. Why are you burning methane to electrolize water? Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted October 14, 2017 Share Posted October 14, 2017 I just calculate how much methane would be required to power the electrolizer of water. Btw this is exactly why hydrogen is produced in industrial amounts not by electrolysis, but by natural methane pyrolysis, burning natural methane to heat the reactor. Quote Link to comment Share on other sites More sharing options...
Rakaydos Posted October 14, 2017 Share Posted October 14, 2017 Just now, kerbiloid said: I just calculate how much methane would be required to power the electrolizer of water. Btw this is exactly why hydrogen is produced in industrial amounts not by electrolysis, but by natural methane pyrolysis, burning natural methane to heat the reactor. What does "How much methane would be required to power the electrolisys of water" have to do with using grid power to turn water+Co2 into methane? Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted October 14, 2017 Share Posted October 14, 2017 (edited) 2 minutes ago, Rakaydos said: to turn water+Co2 into methane? Afaik, Sabatier turns not water, but hydrogen + CO2 into methane. Water is mentioned just because it exists on Mars (and somewhere on Earth). Before you can sabatier, you have to get pure hydrogen somewhere. Edited October 14, 2017 by kerbiloid Quote Link to comment Share on other sites More sharing options...
Rakaydos Posted October 14, 2017 Share Posted October 14, 2017 Just now, kerbiloid said: Afaik, Sabatier turns not water, but hydrogen + CO2 into methane. Before you can sabatier, you have to get pure hydrogen somewhere. Which is what the grid power is for. It's not about being as cheap or efficient as fossil fuels, it's about being carbon neutral (as much as the grid is, anyway). Quote Link to comment Share on other sites More sharing options...
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