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Orion PDR slides to mid 2009
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Orion PDR slides to mid 2009
"Pat Flannery" wrote in message
dakotatelephone... http://www.nasawatch.com/archives/20...pdr_slips.html Pat They're having all sorts of problems; is this kind of thing unusual in a major program? I mean, to have this many problems this early (booster, CM etc)... |
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Orion PDR slides to mid 2009
"Alan Erskine" wrote:
"Pat Flannery" wrote in message hdakotatelephone... http://www.nasawatch.com/archives/20...pdr_slips.html Pat They're having all sorts of problems; is this kind of thing unusual in a major program? I mean, to have this many problems this early (booster, CM etc)... It's not unusual at all - the capsule programs of the 60's had it just as bad, as did the Shuttle. The difference it that because of the 'net the problems are visible to thousands of armchair engineers very nearly in real time. D. -- Touch-twice life. Eat. Drink. Laugh. http://derekl1963.livejournal.com/ -Resolved: To be more temperate in my postings. Oct 5th, 2004 JDL |
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Orion PDR slides to mid 2009
Derek Lyons wrote:
"Alan Erskine" wrote: "Pat Flannery" wrote in message thdakotatelephone... http://www.nasawatch.com/archives/20...pdr_slips.html Pat They're having all sorts of problems; is this kind of thing unusual in a major program? I mean, to have this many problems this early (booster, CM etc)... It's not unusual at all - the capsule programs of the 60's had it just as bad, as did the Shuttle. The difference it that because of the 'net the problems are visible to thousands of armchair engineers very nearly in real time. There is also the difference that in the sixties, those building space ships were considered the cutting edge of engineering. Problems were considered normal. Nowadays, people expect engineers to be able to re-solve the problems that were already solved in the fifties and sixties without much difficulty. Alain Fournier |
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Orion PDR slides to mid 2009
"Alain Fournier" wrote in message
... There is also the difference that in the sixties, those building space ships were considered the cutting edge of engineering. Problems were considered normal. Nowadays, people expect engineers to be able to re-solve the problems that were already solved in the fifties and sixties without much difficulty. Then why can't they? Why do such problems keep happening? |
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Orion PDR slides to mid 2009
Alain Fournier wrote:
Derek Lyons wrote: "Alan Erskine" wrote: They're having all sorts of problems; is this kind of thing unusual in a major program? I mean, to have this many problems this early (booster, CM etc)... It's not unusual at all - the capsule programs of the 60's had it just as bad, as did the Shuttle. The difference it that because of the 'net the problems are visible to thousands of armchair engineers very nearly in real time. There is also the difference that in the sixties, those building space ships were considered the cutting edge of engineering. Problems were considered normal. Given the very tiny number of generations of craft flown, and the constraints on the craft, and the extreme environments involved, and the required performance... They're still on the cutting edge. Nowadays, people expect engineers to be able to re-solve the problems that were already solved in the fifties and sixties without much difficulty. People hold all manner of dammfool ignorant unfounded beliefs. D. -- Touch-twice life. Eat. Drink. Laugh. http://derekl1963.livejournal.com/ -Resolved: To be more temperate in my postings. Oct 5th, 2004 JDL |
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Orion PDR slides to mid 2009
"Derek Lyons" wrote in message
... Alain Fournier wrote: Derek Lyons wrote: "Alan Erskine" wrote: They're having all sorts of problems; is this kind of thing unusual in a major program? I mean, to have this many problems this early (booster, CM etc)... It's not unusual at all - the capsule programs of the 60's had it just as bad, as did the Shuttle. The difference it that because of the 'net the problems are visible to thousands of armchair engineers very nearly in real time. There is also the difference that in the sixties, those building space ships were considered the cutting edge of engineering. Problems were considered normal. Given the very tiny number of generations of craft flown, and the constraints on the craft, and the extreme environments involved, and the required performance... They're still on the cutting edge. I will grant a lot of that. And the fact that much of the generation of engineers that designed the last US manned space craft is retiring or retired and even more of the generation that designed the last manned US manned capsule are retired. However, I think one can easily argue that with Ares I, they took a design with known issues and went from there. And unlike spacecraft design, there are a number of active engineers with recent experience designing boosters. Nowadays, people expect engineers to be able to re-solve the problems that were already solved in the fifties and sixties without much difficulty. People hold all manner of dammfool ignorant unfounded beliefs. But one shouldn't also excuse away some of their mistakes either. D. -- Touch-twice life. Eat. Drink. Laugh. http://derekl1963.livejournal.com/ -Resolved: To be more temperate in my postings. Oct 5th, 2004 JDL -- Greg Moore SQL Server DBA Consulting Remote and Onsite available! Email: sql (at) greenms.com http://www.greenms.com/sqlserver.html |
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Orion PDR slides to mid 2009
Alan Erskine wrote: Then why can't they? Why do such problems keep happening? You know that problem SpaceX's Falcon ran into with the engine still developing some thrust after shutdown? The von Braun team knew about that clean back in WW II, as it was one of the main causes of the poor accuracy of the V-2 missile - which ended up tumbling end-over-end due to the effect after engine shutdown, so in what attitude it reentered the atmosphere wasn't predictable. Pat |
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Orion PDR slides to mid 2009
"Greg D. Moore \(Strider\)" wrote:
Nowadays, people expect engineers to be able to re-solve the problems that were already solved in the fifties and sixties without much difficulty. People hold all manner of dammfool ignorant unfounded beliefs. But one shouldn't also excuse away some of their mistakes either. Certainly. But they key is, as you suggest, to differentiate between dammfool beliefs and dammfool political decisions. D. -- Touch-twice life. Eat. Drink. Laugh. http://derekl1963.livejournal.com/ -Resolved: To be more temperate in my postings. Oct 5th, 2004 JDL |
#10
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Orion PDR slides to mid 2009
"Derek Lyons" wrote in message
... "Greg D. Moore \(Strider\)" wrote: Nowadays, people expect engineers to be able to re-solve the problems that were already solved in the fifties and sixties without much difficulty. People hold all manner of dammfool ignorant unfounded beliefs. But one shouldn't also excuse away some of their mistakes either. Certainly. But they key is, as you suggest, to differentiate between dammfool beliefs and dammfool political decisions. But that requires thinking and thinking is hard. (ok, I'm a bit cynical today :_0 D. -- Touch-twice life. Eat. Drink. Laugh. http://derekl1963.livejournal.com/ -Resolved: To be more temperate in my postings. Oct 5th, 2004 JDL -- Greg Moore SQL Server DBA Consulting Remote and Onsite available! Email: sql (at) greenms.com http://www.greenms.com/sqlserver.html |
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