On the eve of the initial launch date, the MTI engineers and management recommended to delay the launch because the temperature was too low (less than 10☌). NASA: Larry Mulloy (Manager of solid rocket booster), George Hardy (NASA Deputy Director)ĭownload this case study to learn how a ducting system design was optimized with CFD simulation 100% via web browser.(MTI, company manufacturing O-ring), Roger Boisjoly (O-ring specialist), Arnold Thompson (Engineer), Allen McDonald (Project supervisor of solid fuel rocket), Jerry Mason (Senior VP & GM), Joe Kilminster (VP of Space Booster), Robert Lund (VP, Engineering) The two most notable decision makers included: At this juncture, it is interesting to understand the flow of decision making. Further on, as commonly believed, there was no pressure to launch despite the delays. Unfortunately, the issue eventually died down despite many engineers feeling that their concerns were not addressed. On the days before the launch, engineers continuously raised the issue about launching in cold conditions. On the 31 st July 1985, a memo circulated that discussed a definite fear of losing a flight due to these conditions. This launch was done at the lowest ambient temperature.įurther tests in March 1985 demonstrated that the O-ring resiliency had issues when used below 10☌. This meant that the hot gases had penetrated both O-rings completely.
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