Technical Reports

High Cant Deficiency Testing of the LRC Train, the AEM-7 Locomotive, and the Amcoach

Increasing the speed of passenger trains in existing curves has been proposed as an alternative to changing curve radii for the purpose of reducing trip times on the Northeast Corridor. This test evaluates safety at high cant deficiency by comparing direct wheel/rail force measurements to safety...

Railroad Research and Development : Summary Results of 70 Ton Boxcar Testing

Tests were performed at the Transportation Test Center in Pueblo, Colorado on a 70 ton boxcar with Barber S-2C trucks in April and May of 1981. The objective of the tests was to provide definition of the dynamic properties of the freight car for application to the validation of a mathematical...

Wheelclimb Derailment Processes and Derailment Criteria

The most widely accepted criterion for wheelclimb derailment defines an upper limit for safe operation on wheel/rail contact forces on the climbing wheel, with the limit varying with time duration of the forces. For dynamic wheelclimb processes with significant lateral velocities, lateral forces...

Amtrak/Knorr Disc Brake Study : Volume 1 - Final Report

This report describes the Amtrak/Knorr Disc Brake Study which was developed: (1) To evaluate candidate replacement disc brakes for the Knorr discbrakes presently in use on Amfleet and Turboliner cars. (2) To explain the cause of the loosening of the attaching pins and the excessive wear...

Amtrak/Knorr Disc Brake Study : Volume II - Appendices A through I

This volume contains the following appendices to Volume I, Final Report: Appendix A - Wheel Condition Effects Appendix B - Effects of Cyclic Loads on Pin Wear Appendix C - Over-the-Road Test Acceleration Data from the Boston Run Appendix D - Over-the-Road Test Acceleration Data from the...

Brake System Design Optimization- Volume II: Supplemental Data

This report presents supplemental data which support Volume I, A Survey and Assessment, DOT-TSC-FRA-78-1,I,FRA/ORD-78/20,I, dated June 1978, 140 pages. A detailed description of the functional performance of each freight car air brake system component is provided. This is followed by a discussion...

Wheel Failure Mechanisms of Railroad Cars-- Final Report - Volume 1 (Summary Report)

This report summarizes an extensive research program into the causes of wheel thermal failure. Results of material property tests, review of failure data, dynamometer tests, roll dynamics unit, track tests, and theoretical and experimental stress analysis show that heat-treated wheels of designs...

Wheel Unloading of Rail Vehicles Due to Track Twist

An analysis is presented describing the effect that track twist has on the loads carried by the wheels of a rail car. Wheel unloading is determined as a function of the difference in cross level between the truck centers of the car. The different vehicle characteristics that affect a car's reaction...

Laboratory Study to Determine the Effects of Tie Pad Stiffness on the Attenuation of Impact Loads in Concrete Railway Ties

The effect of tie pad stiffness on the bending moments produced by impact loading of concrete railroad ties was investigated in laboratory tests. Controlled impact loads were applied to a one-tie test arrangement in which the pads were interchanged. Beginning with a rigid plastic pad currently in...

Maglev Cost Estimation: Annual Operating & Maintenance Cost Elements

This report describes a proposed cost estimating approach and presents annual operating & maintenance (O&M) cost factors for use in conjunction with VNTSC's Scenario Assessment Models for planning and evaluating super-speed (250-33mph) magnetic levitation (maglev) transportation systems...

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Technical Reports