Truck Design Optimization Project (TDOP) Phase II Type I Truck Performance Test, Test Run 011

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Truck Design Optimization Project (TDOP) Phase II Type I Truck Performance Test, Test Run 011

G. Bakken / E. Bates / D. W. Gibson

Sixteen field tests were performed by Wyle Laboratories, Colorado Springs to measure the performance characteristics of a Type I freight car truck. Reel 11 contains test run 11. (When more than one try was required to obtain a successful run it is denoted with a letter suffix.) A pair of ASF ride control trucks were placed under an empty 100-ton open hopper carbody. New AAR 1/20 wheel profiles were used. The object of the test was to provide performance data during curve negotiation. The test was performed on March 2, 1980 on Union Pacific track near Las Vegas, Nevada. Ninety-six channels of data were acquired to measure car speed, automatic location detection, lateral/vertical wheel-rail forces, wheel/rail angle of attack, axle rotation position, accelerations and displacements at critical points on the truck and carbody. This test run was made over mainline curved track between Arden and Sloan near Las Vegas, Nevada. The test consist was run through a series of eleven left and right curves ranging from 2 to 6 degrees of curvature. The test was run in an uphill direction with a grade of approximately 1%. The test was run at speeds near equilibrium speed for each curve in the test zone. Actual speed varied from 34 mph to 48 mph for the test run.