FIBERGLASS MOTOR CASE STUDY. POLARIS SECOND STAGE END CLOSURE
KIDDE (WALTER) AND CO INC BELLEVILLE N J
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The hydrostatic deflection characteristics of dome closure contours of models of the Polaris second stage were investigated. The model KB- 16 wound over air inflated bladder showed greater deflections than KB-15 wound over a rigid plaster mandrel especially in the polar fitting and knuckle area. The fitting contour did not meet zero shear contour requirements as did the KB-15 model. The contours exhibited by KB-15 were considered more representative. Results were compared graphically with tests conducted on full scale cases no conclusions were made. Forward domes exhibited greater deflections than aft domes probably because of the large metal dish in the aft dome restricting axial growth. Recommendations were made that the built up area on the dome contour be eliminated, that forward and aft domes be identical in size, and that additional instrumentation for deflection and bending strain be utilized in further experimentations.