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The suits are maintained and tested before use to make sure that they are in good condition. In the unlikely event that there was a problem with the suit, then the astronaut would return to the safety of the vehicle.
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Answer provided by Futron Corporation
Image:K2S logosmall.jpg Question and Answer extracted from the book Kids to Space - by Lonnie Schorer
... the potentials of critical points of failure whenever necessary to guard against random failures or failures due to wear, fatigue or aging, but only if common cause failures is an unlikely threat.
(7) Use ... redundancy, diversity and simplicity of inherent safety features. The dominant failure modes then always become:
a) Common mode failures — a unifying failure inherent in the design that disables many systems at once and ...
... that said you will always maintain yourself in a
posture such that no single failure, subsequent single failure, could
put the crew at risk.
Now, to illustrate how you would apply that ... 'll bet you that probably somewhere between a third and a half of all
failures were not failures we'd thought of, that we had no mission rule
for them. But having ... day. Well, this
was the day to really work this over, and they threw me failure after
failure. Oh, that was a nightmare sim day. They just kept failing
thrusters and failing ...
... circuit breakers and throw a couple of switches to reduce your susceptibility to the next failure. I did that, and by the time I looked around, I realized, hey, this is ... and concentrated, if anything goes wrong, the Orbiter only takes care of the first failure. The second failure is pretty much left to the crew, generally, and so you worry about being ... . Big ones are really different from one to the next, and flying them with engine failures and that sort of thing are a bigger challenges. So there’s some maybe more ...
... hybrid mission. Atlas-Centaur launch vehicle had history of 3 failures out of 16 operational vehicles, without apparent relationship between failures, giving probability of success of 80% if based solely on past ... have not imposed a requirement for total elimination of single point failure modes, but have concentrated upon reducing the probability of failure by careful design, parts application, major quality and reliability efforts ...
... from a crew standpoint in that respect, that we
don’t set them up for failure.
'''Clancy:''' It’s an iterative process between us, the crew, and the
program. The program ... the
crew to continue.
'''Clancy:''' You could almost liken it to some of the generic failures that
the Shuttle crew members and the Station crew members practice on a
regular basis ... ’t have to do that, because they didn’t really have a
whole lot of failures. We had a couple minor hiccups, but nothing we
couldn’t work around.
'''Hansen:''' Which ...
... from a crew standpoint in that respect, that we
don’t set them up for failure.
'''Clancy:''' It’s an iterative process between us, the crew, and the
program. The program ... the
crew to continue.
'''Clancy:''' You could almost liken it to some of the generic failures that
the Shuttle crew members and the Station crew members practice on a
regular basis ... ’t have to do that, because they didn’t really have a
whole lot of failures. We had a couple minor hiccups, but nothing we
couldn’t work around.
'''Hansen:''' Which ...
... with Thor, with Thor-Able rocket. These all preceded Ranger.
There were a dozen failures, ten or eleven failures. Was it that high?
Maybe not quite. It was maybe close to ten ... never said that.
'''Dinkel:''' No, you never did. Why is it classified as a successful failure?
'''Cortright:''' Nobody got hurt. That's all you can say about it.
'''Dinkel:''' You wound ... what was learned from the test procedures.
'''Cortright:''' That's probably an oversimplified statement. The failure
occurred—it starts out with the oxygen tank. It was on a shelf, and they ...
... crossed my mind that we would have a problem. People say failure is not an option. I don’t think failure was even in my vocabulary, seriously. Because Dave Reed and I ... and come up with what abort region you’re in, if you have an engine failure or failures, what do you do at this point in time, and if you do, what ... trajectories we’d have to worry about, what kind of failures we had to worry about. Turns out the biggest failure that you worry about in the Shuttle is loss of an ...
... were limited by propulsion capabilities designed into the vehicle and also by what the actual failure was. Primarily I was working trajectory simulations and in the emergency or abort planning part ... complex thing and it’s hard to walk through sequentially with all the possible failures and which failures could occur during different stages. In different stages of flight you could either be ...
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