=+68. Three sets of journal bearing tests were run on a Mil-L-8937-type film at each combination of three loads (psi) and three speeds (rpm). The wear life

(hr) was recorded for each run, resulting in the following data (“Accelerated Testing of Solid Film Lubricants,” Lubrication Engr., 1972: 365–372):

Load Load Speed (1000s) Life Speed (1000s) Life 20 3 300.2 60 6 65.9 20 3 310.8 60 10 10.7 20 3 333.0 60 10 34.1 20 6 99.6 60 10 39.1 20 6 136.2 100 3 26.5 20 6 142.4 100 3 22.3 20 10 20.2 100 3 34.8 20 10 28.2 100 6 32.8 20 10 102.7 100 6 25.6 60 3 67.3 100 6 32.7 60 3 77.9 100 10 2.3 60 3 93.9 100 10 4.4 60 6 43.0 100 10 5.8 60 6 44.5