Lubricants for High Performance Turbine Engines

Several lubricants now available have the requisite performance characteristics for use in the high temperature environments predicted for the Mach 2.0-4.0 turbojet engines. Based upon bench and rig evaluations, these lubricants promise levels of safety, reliability, and economy in the high Mach number engines equivalent to current commercial lubricant powerplant systems. Performance data comparing existing commercial aviation lubricants with the advanced Type 3 and Type 4 lubricants are reported and discussed.