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NASA Astronaut on Columbia Repair (and others)
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NASA Astronaut on Columbia Repair (and others)
On Tue, 14 Nov 2006 18:58:40 -0600, Pat Flannery wrote:
Pat Flannery wrote: Lookie what I found - Story Musgrave's film: javascript:LaunchVideo('/tech/2003/02/05/vo.reentry.1997.nasa.','300k'); This has narration. If that doesn't work, it's on this webpage: http://edition.cnn.com/2003/TECH/spa...ure/index.html "Video" box on the right hand side. It's a pay site now. Put it on Youtube for a day. |
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NASA Astronaut on Columbia Repair (and others)
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NASA Astronaut on Columbia Repair (and others)
In article , "Danny Dot" wrote:
In that case it shares it with every other large organisation. People just protecting their jobs. I have worked for several other large organizations, I found NASA to be the worst. Recall two commissions have found a problem with NASA's culture. Perhaps the problems is work place bullies. It is certainly worth a look at in my opinion. I dont know Ive always felt NASA's culture, although its always viewed as being this oddly unique thing, can actually be found in any large organisation that has an engineering or technical focus that involves a level of non technical decision making. because that will always produce a conflict where an issue that has to be resolved technically, has to be decided by someone whose view might well be more focussed on a balance sheet or a delivery date than why x is really such a big problem the difference with NASA is their mistakes make headline news , in a large business the same kind of cultural mistake occuring might just blip the share price for a day or two. Aw |
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NASA Astronaut on Columbia Repair (and others)
Craig Fink wrote: Personally, I from what I've read in the CAIB, it doesn't look to me that NASA seriously looked at the repair option before putting out the report. Bags of water For once and for all, forget the bags of water. Water at cabin temperature will boil on contact with vacuum, and the bag will explode. All you are going to end up with is a huge shower of small droplets spraying all over the airlock's insides as soon as it's depressurized. Pat |
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NASA Astronaut on Columbia Repair (and others)
Pat Flannery wrote: [...] For once and for all, forget the bags of water. Water at cabin temperature will boil on contact with vacuum, and the bag will explode. All you are going to end up with is a huge shower of small droplets spraying all over the airlock's insides as soon as it's depressurized. I'm not convinced that a gallon ziplock, sealed, in the heavy-duty gauge, would explode -- the bag would keep the vapor pressure under control, and the water wouldn't freeze until it had radiated the heat away, which may take some time. It isn't until you try to *remove* the water from the bag that you'd have flash evaporation, so your airlock may be safe, even if you can't do anything useful with the water. /dps |
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NASA Astronaut on Columbia Repair (and others)
On Wed, 15 Nov 2006 20:46:01 -0600, Pat Flannery wrote
(in article ): Craig Fink wrote: Personally, I from what I've read in the CAIB, it doesn't look to me that NASA seriously looked at the repair option before putting out the report. Bags of water For once and for all, forget the bags of water. Now you understand why many of us finally killfiled him - he spouts the same nonsense over and over again and just completely ignores information to the contrary. -- Herb Schaltegger "You can run on for a long time . . . sooner or later, God'll cut you down." - Johnny Cash http://www.angryherb.net |
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NASA Astronaut on Columbia Repair (and others)
JF Mezei wrote: Pat Flannery wrote: For once and for all, forget the bags of water. Water at cabin temperature will boil on contact with vacuum, and the bag will explode. Then why is it that water, flowing out of the toilet into space often freezes up and clogs the outflow hole on the shuttle's surface ? As the pressure drops the water boils into vapor - this causes it to drop in temperature and freeze almost immediately: http://www.newton.dep.anl.gov/askasc...1/gen01060.htm The problem that they ran into with the toilet was that the water froze as it was coming out the outlet, and each successive "flush" of the toilet made the icicle grow as more water stuck to its surface and froze, just the way that water flows down a icicle's exterior and freezes on its end. Obviously, if you put the sun on it, it will melt and evaporate. It will take a while; it's slowly evaporating into the vacuum, and that evaporation will cause it to cool down yet more. In the case of the Shuttle's toilet icicle they ended up using the Remote Manipulator Arm to knock it off after a couple of days. And "explode" is perhaps a strong word. The bag would burst and let evaporated water out well before any "explosive" pressures could build up. I probably should have said "rupture" instead. It would be a real mess, as whoever is holding the bag is probably going to end up with ice stuck all over their EVA suit. There's a graph for figuring out its boiling point at varous pressures he http://designer-drugs.com/pte/12.162...nomograph.html Pat |
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NASA Astronaut on Columbia Repair (and others)
On Wed, 15 Nov 2006 22:19:50 -0600, Pat Flannery
wrote: Obviously, if you put the sun on it, it will melt and evaporate. It will take a while; it's slowly evaporating into the vacuum, and that evaporation will cause it to cool down yet more. ....If evaporation were as rapid as this guy thinks it should be, we'd have never heard of Halley's Comet, or anything else inside the Oort Cloud. In the case of the Shuttle's toilet icicle they ended up using the Remote Manipulator Arm to knock it off after a couple of days. ....Ah, the great "Cosmic Space Turd". The wire stories for that event were the first copy editing assignment I had at the _Deadly Texan_, over 20 years ago. Damn thing came off not quite as easy as they thought it would; IIRC it took two swipes to knock it off, which led to quite a few comments about the thing being proof that Space Food Sticks lead to constipation no matter what the digestive tract :-) OM -- ]=====================================[ ] OMBlog - http://www.io.com/~o_m/omworld [ ] Let's face it: Sometimes you *need* [ ] an obnoxious opinion in your day! [ ]=====================================[ |
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