Minuteman Stage III Operational Surveillance Program Seven-Year Testing Bondline Aging Study,
MORTON THIOKOL INC BRIGHAM CITY UT WASATCH OPERATIONS
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The program objective is to provide material properties aging data at silo conditions 70 or - 5 F, 50 or - 5 percent RH for liner bond strength, ANB-3066 propellant, SD-851-2 liner, and V-45 insulation from selected locations of three Minuteman Stage III motors. These data are to be used to relate the conditions of the dissected motors to those of operational motors via excise samples and to compare and adjust the age of all of these to the Stage II nominal liner degradation curve. This report contains results of the yearly material properties testing of Stage III motor segments in the 12-year bondline aging study. Also reported are the results obtained in the continued testingmonitoring of Motor TC 30024 LRSLA Simulated Aging Test No. 3, as are the second year results of tests upon the bondline materials and propellants obtained from dissected stage III segments of Motor TC 30072. The twelve-year bondline aging study uses segments removed from three in-process reject motors which were cast in 1971 and were rejected due to apex voids. Segments maintained at silo conditions are being used to track bondline aging of Stage III motors with testing of material properties being performed at one-year intervals to 1990.
- Solid Rocket Propellants