RSRM Nozzle-to-Case Joint J-Leg Development

summary of the tests conducted and a brief discussion of the results of the specific test. A full-scale aft dome process simulation article was fabricated which demonstrated the insulation layup of the J-leg configuration, the use of a new mold ring and evaluation of bafne formers. This article showed that the configuration could be fabricated using the new tooling, and provided acceptable postcure dimensions including the pressurization gaps formed by the baffle formers. A full-scale resiliencykompression set test was conducted for the nozzle-tocase joint J-leg configuration. The assembled joint was placed in a controlled storage environment, and was disassembled periodically to evaluate resiliencykompression set of the J-leg. The humidity and temperature were varied during a controlled storage time. The joint resiliency was measured after each disassembly to determine the percent rem (compression set) of the J-leg. The resiliency at the J-leg tip after 20 months of assembly time was 32%. The average joint interference after 20 months was 0.106-inch. Structural analysis showed that the minimum joint interference