Truck Design Optimization Project (TDOP) Phase II Type I Truck Performance Test, Test Run 010A

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Truck Design Optimization Project (TDOP) Phase II Type I Truck Performance Test, Test Run 010A

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 10 contains test run 10a. (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 10 mph below equilibrium speed for each curve in the test zone. Actual speed varied from 24 mph to 38 mph for the test run.