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As data obtained from experimental testing of friction materials operating in oil have long been a subject of controversy between transmission engineers, we present a brief description of several test machines and associate instrumentation, in general use today. Namely: A constant drive - constant torque unit, an inertia type dynamometer. (This unit is most generally used), and finally, a new design which operates both the drive and driven members simulating most any transmission operation desired. Here, the same fundamental instrumentation is used as that for a test transmission. Regardless of the unit, most of the following data is recorded depending on flexibility and instrumentation: 1. Torque 2. Deceleration or acceleration 3. Temperatures of oil 4. Operating pressures 5. Speed, plus various other data as requested.

A road test was conducted by the Automotive Laboratory of The Atlantic Refining Company on six cars, each of two different makes, to obtain the driver's reactions to four chassis lubricants. Factors to be evaluated included squeaks heard by the driver. An investigation was made of the influence of grease composition on chassis performance; greases tested included an aluminum stearate grease, two lithium soap thickened greases and a non-soap type of grease. Results indicate that a 1,000 mile lubrication frequency is important since a large increase in complaints beyond 1,250 miles of operation was recorded.

The Air Force has been using synthetic gas turbine lubricants, in quantity, for the last four years. The experience obtained with these lubricants, although varying, has for the most part been satisfactory. This experience has been broken down into three categories, laboratory, engine and material experience with each subject being discussed in some detail. The reasons for using synthetic lubricants and the need for improved lubricants are also discussed.