LUBRICATION RESEARCH AND TEST METHOD DEVELOPMENT FOR AEROSPACE PROPULSION SYSTEMS.
Rept. for 15 Feb 64-15 Apr 65,
SOUTHWEST RESEARCH INST SAN ANTONIO TEX
Pagination or Media Count:
This program was concerned with the further development of the ABMA impact tester and the investigation of different test methods used to determine the impact sensitivity of materials in contact with rocket propellants. It was found that the specimen cup material and design had a significant effect on plummet rebound height. The use of a modified anvil region assembly, including a steel specimen cup, significantly increased the reactivity of materials subjected to impact in the presence of LOX in addition to improving plummet rebound height repeatability. The up-and-down test procedure, from which a statistical estimate of the drop height producing a 50-percent probability of reaction may be obtained, was investigated. The results of 10 separate up-anddown tests on one grease material showed repeatability to be excellent. Results were also obtained for additional greases and these results showed that some greases rated as satisfactory had about the same 50-percent points as other greases considered unsatisfactory, with the only apparent difference being the intensity of the reactions. Author