Evaluation of Proposed Hydraulic Fluids for the SST

The results of pump loop testing 50 candidate supersonic transport (SST) hydraulic fluids were presented to the May 1965, SAE Aerospace Fluid Power Systems and Equipment Conference in Los Angeles. This paper presents the results of subsequent pump loop testing of nine new fluids or compoundings. A discussion of simulated fire-resistance testing is also included.

Results of pump loop testing to date indicate that four specific types of fluids are considered the best SST hydraulic fluid contenders. They are: chlorosilicone, mineral oil, perfluoroalkyl, and polyaryl.