22 June 1999 Dynamics of a b-nut failure
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Proceedings Volume 3516, 23rd International Congress on High-Speed Photography and Photonics; (1999) https://doi.org/10.1117/12.350452
Event: Twenty-Third International Congress on High-Speed Photography and Photonics, 1998, Moscow, Russian Federation
In August of 1989, the Galileo spacecraft, consisting of an orbiter and probe, was mounted to an Inertial Upper Stage (IUS) rocket stage being readied for flight aboard NASA's Space Shuttle, 'STS-34,' 'Atlantis.' During routine age testing of an IUS igniter fire line circuit, a 'b-nut' failure occurred. On board the Galileo/IUS first stage rocket motor was a b-nut from this failed lot. There was concern that the mission could be jeopardized if the b-nut failed because of the close proximity of the IUS second stage rocket motor nozzle. A fix had to be made to insure mission success. Chemical Systems Division was called upon to provide high- speed motion picture photography at 3000 frames per second to analyze the dynamics of a b-nut failure, and verify that the fix would prevent damage to the second stage nozzle, should a b-nut failure occur. This report will show how displacement and velocity measurements can be made from 16 mm motion picture film.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter V. Zarubin, Peter V. Zarubin, } "Dynamics of a b-nut failure", Proc. SPIE 3516, 23rd International Congress on High-Speed Photography and Photonics, (22 June 1999); doi: 10.1117/12.350452; https://doi.org/10.1117/12.350452


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