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Dauphin
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Caught in a tuna net
Jan 1970 time: 05:22
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Failure rates of presnet launches ranges from 2% to 25%. The Chinese launches are running at a rate of 1 in 6 or there abouts, the US attempts in the 60's ran at about 1 in 5 or so. I don't see why private programmes will not suffer similar rates of failure and setback.
In 5 attempts I would expect at least each competitor to have a 50% chance of a serious set-back of some kind.
Last edited by Dauphin on 28-09-2004 at 22:28
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DanS
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Kickball Capital of the World
Jan 1970 time: 00:22
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If you plan on some unmanned launch vehicle failure by preparing redundant modules, as Bigelow is doing, then these setbacks should be negligible. A half year. 3/4 of a year tops.
With regard to the chance of individual launch failure, the Dnepr, on which Bigelow will fly most of his test articles, currently has a first level Bayesian estimate chance of failure of 16.7% for the next launch -- it hasn't failed yet in 4 launches, but doesn't have the track record for a lower demonstrated chance of failure. However, consider that as the test program goes on, the chance of individual failure falls rapidly. And again, an individual launch failure does not automatically mean that the program is delayed.
For crewing the station, we don't have to worry about that until 2010. But the Russians have proven that humans can be launched safely using expendable rockets. In a pinch, the Russians would happily launch a crew of 3 for $60 million or whatever.
For cargo, the rate of launch failure shouldn't impact the endeavor's schedule.
Last edited by DanS on 28-09-2004 at 23:23
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My Wife Hates CIV
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Michigan
Jan 1970 time: 05:22
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I agree... dont see it happening. Not by 2010. Even the x-prize thing is only sub-orbit. It will take a bit more to go 18k mph at 200miles up.
Hope the x-prize thing wednesday goes ok. I still wouldnt be surprised if something bad happens. We'll see what happens to all this if they blow up.
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