Technical Reports

Cant Deficiency Test Safety Monitoring Using Accelerometer Measurements

The FRA has performed high cant deficiency curving tests on several passenger trains using instrumented wheels to measure wheel forces for comparison to derailment safety criteria. Data from these tests show that the vehicle overturning safety criterion which prevents wheel lift is the most...

A Comparison of Model and Field Test Dynamic Performance Data for a Two-Axle Freight Car

A microcomputer based simulation has been developed for predicting the safety related dynamic performance of rail cars. The simulation has been implemented specifically for a two-axle rail vehicle. Model data for test scenarios prescribed by the Association of American Railroads' (AAR) Chapter XI...

Rail Garrison - Vehicle Stationary Vibration Tests

The United States Air Force (USAF/BMO) requested support from the Federal Railroad Administration (FRA) to assist in technical issues related to the development of the Peacekeeper Rail Garrison Program. During operation of the Rail Garrison train, the consist will stop at various locations to...

Laboratory Investigation of Roller Bearing Damage Due to Impact

This report presents the results of a two phase testing program to measure the strains in the roller separators (cages) of a bearing during impact loading. The impact loading is similar to the impacts encountered during in-service operations with flat spots on the wheels. The first phase of the...

Equipment Testing and Analysis - Glazing Impact Test: An Evaluation of Two Plastic and Glass Window Systems Subjected to Projectile Impacts

Impact tests were conducted at the Transportation Test Center on two glazing systems installed in railroad locomotives, passenger cars, and cabooses. A 1/4" thick extruded polycarbonate plastic and a 1/4" thick cast acrylic plastic, each installed in combinations with a 1/4" thick sheet of tempered...

Wheel Failure Mechanisms of Railroad Cars: Volume II - Technical Task Summaries

This report summaries 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...

Inductive Interference in Rapid Transit Signaling Systems, Volume II: Suggested Test Procedures

Methods for detecting and quantifying the levels of inductive electromagnetic interference produced by solid state rapid transit propulsion equipment and for determining the susceptibility of signaling systems to these emissions are presented. These methods include procedures for taking...

Impact of Railroad Contracts on Corn, Wheat and Soybean Bids to Elevators and Farmers

This report presents the results of research conducted to determine the impact of destination and origin railroad contracts on grain bids to elevators and farmers. The impact of destination contracts on grain bid prices to elevators was estimated by comparing bid prices for rail delivered grain at...

High Performance, High Cube Covered Hopper Car Program, Transit America's HI CUBE 2000 Car Dynamic Performance Tests, Summary Report

As part of the co-operative Track-Train Dynamics High Performance, High Cube Covered Hopper Program, Transit America provided a prototype car - the HI CUBE 2000 for dynamic performance tests under the program's performance guidelines. This new design car was tested to evaluate its dynamic...

High Performance, High Cube Covered Hopper Car Program, Base Car Dynamic Performance Tests: Volume 4 - Summary

This report presents a summary of the dynamic performance tests of a 4750 cubic foot capacity high cube covered hopper car. All the tests were conducted at the Transportation Test Center in Pueblo, Colorado. Results of the reduction and analysis of test data for the rock-and-roll, pitch-and-...

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Technical Reports