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Collected Reports of the Panel on Technical Evaluation of NASA's Redesign of the Space Shuttle Solid Rocket Booster (1988) / Chapter Skim
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5 Interim Report #5: November 20, 1987
Pages 33-36

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From page 33...
... Fletcher Administrator National Aeronautics & Space Administration 400 Maryland Avenue, S.W., Room 7137 Washington, DC 20546 Dear Jim: November 20, 1987 I am pleased to submit herewith the fifth interim report of the National Research Counci1's Panel for the Technical Evaluation of the Redesign of the Space Shuttle Solid Rocket Booster. Since our last report, the Panel has conducted two formal meetings and members have met with the redesign team during three test readiness reviews, three technical interchanges, and the DM-8 hot firing.
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From page 34...
... With no similar tests of the secondary O-rings planned on full-duration motors, we believe that the number of such tests planned for the short-duration simulation test articles shout ~ be increased. Furthermore, measures taken to ensure that the O-rings experience pressure in the respec tive tests also prevent the pretest application of pressure in the usual way to seat the O-rings in the proper direction.
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From page 35...
... Recognizing the severe time constraints already imposed on these test units, the Panel recommends that if the schedule of test activities before the next flight is not sufficiently flexible to accommodate our recommendations for additional tests, consideration be given to providing the necessary room in the test program by deferring some of the testing now planned for so-called "manufacturing defects." In closing, I am again pleased to congratulate NASA for the high degree of profess tonal ism and dedication of the redesign team. We are grateful for the informative technical presentations and discussions which have f acid itated our task.
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  • ormation rates
  • severe time
  • overall testing
  • latter type

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  • varied environments
  • inch uding
  • additional tests
  • flight articles

  • simulation test
  • presently planned
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  • require additional
  • similar tests
  • subscale tests


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