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Orion PDR slides to mid 2009
"Derek Lyons" wrote in message ... "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. The difference was with Apollo, von Braun didn't believe the initial weight estimates for the CSM and LEM. So he put in generous performance margins in the design of the Saturn V. That didn't happen with Ares I and Orion, which is why mass budgets are so tight on both programs. In other words, today's NASA management thought there wouldn't be problems when they set the initial mass/payload requirements for Orion/Ares I. Jeff -- A clever person solves a problem. A wise person avoids it. -- Einstein |
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