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#51
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bob haller wrote:
Caution should be the watchword as another MAJOR screw up may take man out of nasa forever. It is called risk management. You know there is a risk of crossing a street on a green light because some crazy driver may decide to ignore his red light. But you also know that risk is fairly low and that if it happens, you may have enough time to react and save your life. On the station, most everything happens in slow motion. Contrary to Star Trek, when life support fails on station, the crew don't immediatly faint. If there is total loss of power, the crew don't instantly freeze to death and then burn up as the station immediatly falls back to earth. Mir provided plenty of lessons in that respect. (fire, depressurisation, total loss of power etc) Oh, and they have the Soyuz as escape pod. So, if a meteorite hits the station and depressurisation happens so quickly that the crew don't have time to get to Soyuz or isolate the faulty module, then I strongly suspect that a board of inquiry will decide that neither NASA nor Russia were at fault, and may in fact point fingers at congress for widthadring funding for a US side espace pod, or preventing the USA from purchasing an Extra Soyuz to be parked on the USA segment to provide dual "exits" from station. |
#52
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So, if a meteorite hits the station and depressurisation happens so quickly that the crew don't have time to get to Soyuz or isolate the faulty module, then I strongly suspect that a board of inquiry will decide that neither NASA nor Russia were at fault, and may in fact point fingers at congress for widthadring funding for a US side espace pod, or preventing the USA from purchasing an Extra Soyuz to be parked on the USA segment to provide dual "exits" from station. What just what if the worst happens and electron explodes and the crew dies, while the station control is permanetely lost, creating a ISS deathwatch, with fear of debris hitting people on earth? Falling so closely after Columbia NASA might be neutered permanetyely by congress. Manned spaceflight muight never recover. Or any other failure where the station is lost, or crew is injured. With the station in limp along mode a safety inquiry might be very damaging.. HAVE A GREAT DAY! |
#53
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"Derek Lyons" wrote in message ... "Jeff Findley" wrote: "Explorer8939" wrote in message om... Basically, US ECLSS suffers from the same fate as a lot of other US space technology, lots of systems engineering, great viewgraphs, but the damned thing doesn't work. I know. I just like to see others pointing this out since Derek is constantly bashing the Russian ECLSS components that are working, at least part of the time. sigh No, I'm not bashing the Russian components. I'm pointing out that that Russian systems aren't the all perfect all wonderful (all singing, all dancing) things they are all too often believed to be by many. D. -- To try to get back on the Elektron repair situation. SpaceNews September 13, 2004 Issue. Oxygen Generator Shutdown Poses No Threat to ISS Crew Quote: The Russian-made Elektron oxygen generator has shut down before, usually due to air bubbles. Engineers in Moscow initially suspected a clogged line was to blame for the latest shutdown, but a potential software glitch became the prime suspect Sept. 10 after ISS Crew Commander Genady Padalka spent the better part of the day rebuilding Elektron and clearing its lines. End of quote. See the article for some more details. Sounds as if the Russians are still working on and making changes to Elektron so they aren't just recycling old hardware. Sounds as if they still aren't doing a thorough job of testing software fixes before using them. (I draw that conclusion from some of the information in the book Dragonfly). In order to determine just how reliable Elektron really is you would need to be able to view its operating experience and measure how long it is on and off-line. I also note that sometimes when you try to fix things to increase reliability you can make things worse. From the article, I would assume that the Russians are actively trying to upgrade Elektron and I give them credit for that. Mike Walsh |
#54
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"bob haller" wrote in message ... What just what if the worst happens and electron explodes and the crew dies, while the station control is permanetely lost, creating a ISS deathwatch, with fear of debris hitting people on earth? For all you know about Elektron, this could be as likely as a toaster oven exploding. Jeff -- Remove icky phrase from email address to get a valid address. |
#55
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For all you know about Elektron, this could be as likely as a toaster oven exploding. Jeff Actually that occured once here when I was a kid, turned out to be A known manufacturers defect and they replaced the 3 year ld unit for free Elektron has all the needed ingredients for explosion, oxygen hydrogen and electricity, along with being in poor condition... If theres a problem what will the next safety board have to say about ISS management? HAVE A GREAT DAY! |
#56
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"bob haller" wrote in message ... Actually that occured once here when I was a kid, turned out to be A known manufacturers defect and they replaced the 3 year ld unit for free Elektron has all the needed ingredients for explosion, oxygen hydrogen and electricity, along with being in poor condition... So does a fully charged cell phone dropped in the toilet, but that doesn't mean that the toilet is going to explode. Jeff -- Remove icky phrase from email address to get a valid address. |
#57
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bob haller wrote:
Elektron has all the needed ingredients for explosion, oxygen hydrogen and electricity, along with being in poor condition... Actually, we don't know that Elektron is in "poor" condition. We know that it is not in best posisble condition and that sensors shut it down when they detect an anomaly. (even without gas analyser). Does it get shut down seconds before the unit would have turned into a hydrogen bomb ? Or does it shut down a microsecond after 2 molecules strayed into the wrong tube ? We don't know that. It could very well be that Elektron fails often because they have extremely high safety standards and it shuts down WAY before any danger could occur. Or problems could be detected verty late in the game, which might make it a dangerous unsafe unit. WE DO NOT KNOW WHICH APPLIES. But the possibility remains that it is still quite safe to operate. |
#58
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dangerous unsafe unit. WE DO NOT KNOW WHICH APPLIES. But the possibility remains that it is still quite safe to operate. Yep. and columbia, foam shedding is safe HAVE A GREAT DAY! |
#59
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So does a fully charged cell phone dropped in the toilet, but that doesn't mean that the toilet is going to explode. Jeff cell phones dont intentionally break down hydrogen and oxygen... HAVE A GREAT DAY! |
#60
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