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Soyuz to be fixed at Space Station
Russian space engineers say the bolts at one particular location failed to
work properly during each of the two previous Soyuz landings... http://www.msnbc.msn.com/id/25399516/ ....Russian experts have told NASA that the bolts at position 5 apparently failed to fire during both previous Soyuz descents...If all goes as planned, the bolt in its protective canister will be returned to Earth inside the Soyuz when it lands in October. The Russians will study the bolt to determine if the recent failures represented some fabrication flaw or merely random coincidences... (Wiring) fabrication flaw or (Bolt) fabrication flaw and random coincidence? Bad bolt, then they found the problem, and the risk to this entry was reduced by 1/5 th, as the other four positions could randomly have two bad bolts. Removing another bolt would reduce the risk by another 1/5th. Good bolt, keep looking. If it's a wiring problem with position 5 then the risk to this entry was eliminated with the removal of the bolt. -- Craig Fink Courtesy E-Mail Welcome @ |
#2
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Soyuz to be fixed at Space Station
"Craig Fink" wrote in message
m... Bad bolt, then they found the problem, and the risk to this entry was reduced by 1/5 th, as the other four positions could randomly have two bad bolts. Removing another bolt would reduce the risk by another 1/5th. Good bolt, keep looking. If it's a wiring problem with position 5 then the risk to this entry was eliminated with the removal of the bolt. Are they going to replace the bolt? |
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Soyuz to be fixed at Space Station
"Alan Erskine" wrote in message ... "Craig Fink" wrote in message m... Bad bolt, then they found the problem, and the risk to this entry was reduced by 1/5 th, as the other four positions could randomly have two bad bolts. Removing another bolt would reduce the risk by another 1/5th. Good bolt, keep looking. If it's a wiring problem with position 5 then the risk to this entry was eliminated with the removal of the bolt. Are they going to replace the bolt? From what I've read, they are just going to remove it. The Russians have said the other bolts would hold the sections together until they need to be separated. George |
#4
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Soyuz to be fixed at Space Station
"George" wrote in message
.. . "Alan Erskine" wrote in message ... "Craig Fink" wrote in message m... Bad bolt, then they found the problem, and the risk to this entry was reduced by 1/5 th, as the other four positions could randomly have two bad bolts. Removing another bolt would reduce the risk by another 1/5th. Good bolt, keep looking. If it's a wiring problem with position 5 then the risk to this entry was eliminated with the removal of the bolt. Are they going to replace the bolt? From what I've read, they are just going to remove it. The Russians have said the other bolts would hold the sections together until they need to be separated. George They hope. phew. At least they're doing something; it also shows how desparate they are about this problem and seem to realise that it's life-threatening. |
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Soyuz to be fixed at Space Station
"Brian Gaff" wrote in message
om... Hmm, time was that anyone fiddling with bolts that had any pyro devices associated with them was a no no for flight crew. Are we saying that these are definitely categorically safe to fiddle with? No. It shows how desparate they are to fix it. |
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Soyuz to be fixed at Space Station
Alan Erskine wrote:
"Brian Gaff" wrote in message om... Hmm, time was that anyone fiddling with bolts that had any pyro devices associated with them was a no no for flight crew. Are we saying that these are definitely categorically safe to fiddle with? No. It shows how desparate they are to fix it. Stated another way, they consider the risk incurred by the cosmonauts fiddling with the pyrobolts is less than the risk incurred by performing the next Soyuz entry without inspecting the bolts. |
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Soyuz to be fixed at Space Station
"Jorge R. Frank" wrote in message
... Alan Erskine wrote: "Brian Gaff" wrote in message om... Hmm, time was that anyone fiddling with bolts that had any pyro devices associated with them was a no no for flight crew. Are we saying that these are definitely categorically safe to fiddle with? No. It shows how desparate they are to fix it. Stated another way, they consider the risk incurred by the cosmonauts fiddling with the pyrobolts is less than the risk incurred by performing the next Soyuz entry without inspecting the bolts. Have the crew trained for such a thing? I wouldn't have thought they'd have the right tools for removal either as it's a rather specialised device. If they're not trained, I hope they've said farewell to their families, just in case. I'm not confidant at all of success on this task. |
#9
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Soyuz to be fixed at Space Station
Alan Erskine wrote:
"Jorge R. Frank" wrote in message ... Alan Erskine wrote: "Brian Gaff" wrote in message om... Hmm, time was that anyone fiddling with bolts that had any pyro devices associated with them was a no no for flight crew. Are we saying that these are definitely categorically safe to fiddle with? No. It shows how desparate they are to fix it. Stated another way, they consider the risk incurred by the cosmonauts fiddling with the pyrobolts is less than the risk incurred by performing the next Soyuz entry without inspecting the bolts. Have the crew trained for such a thing? I wouldn't have thought they'd have the right tools for removal either as it's a rather specialised device. The tools were brought up on the most recent Progress. |
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Soyuz to be fixed at Space Station
"Jorge R. Frank" wrote in message
... The tools were brought up on the most recent Progress. What about the training? That's got to be tough. |
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