Track worthiness tests were performed on a consist of three commercial depressed center flatcars (Triplet Cars) equipped with span bolsters to distribute heavy loads over four trucks. Tests were compared to, but not limited by, specifications in Chapter XI of the AAR's, Manual of Standards and Recommended Practices. The Triplet Cars track worhiness tests were performed to investigate the coupled car performance of span bolster cars before the individual Peacekeeper Rail Garrison (PKRG) span bolster cars were assembled in a train. Two of the Triplet Cars had trucks with 36-inch wheelsets similar to the PKRG security car and launch control car. The third car had trucks with 38-inch wheelsets similar to those used in the PKRG Missile Launch Car. A second phase of testing was performed using the two Triplet Cars with 36-inch wheel sets and the Missile Launch Car (MLC), EMS-1. During Phase 1 testing, all Triplet Cars performed within Chapter XI limits in the Pitch and Bounce Test, Twist and Roll Test, and the Yaw and Sway Test. The leading car exceeded Chapter XI criteria during hunting. The leading and trailing cars exceeded Chapter XI criteria during dynamic curving. All cars passed constant curving in the 7.5-degree curve and the 12-degree steady state curving, but the leading car exceeded Chapter XI criteria in the curve entry, and the trailing car exceeded criteria in the curve exit. No. suspension separation, wheel lift, or permanent deformation of the car body was observed during the Curve Stability Test. During Phase II testing, the Triplet Cars (leading and trailing) and the MLC performed within Chapter XI limits in the Pitch and Bounce Test, Twist and Roll Test, Yaw and Sway Test, and the Dynamic Curving Test.


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    Title :

    Peacekeeper Rail Garrison Triplet Cars Track Worthiness Tests


    Contributors:
    E. Bier (author)

    Publication date :

    1991


    Size :

    336 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English