Technical Reports

Freight Car Fatigue - Coal Car Simulator Demonstration Test

A full scale fatigue test of a 100-ton coal gondola car on the Transportation Test Center's (TTC) Simuloader facility was successfully completed recently. With a short test encompassing 270 hours of Simuloader testing, the freight car was subjected to fatigue damage equivalent to 600,000 miles of...

Double Stack Container Systems: Implications for U.S. Railroads and Ports - Final Report

This study assesses the potential for domestic double-stack container transportation and the implications of expanded doublestack systems for railroads, ports, and ocean carriers. The study suggests that double-stack service can be fully competitive with trucks in dense traffic corridors of 725...

Double Stack Container Systems: Implications for U.S. Railroads and Ports - Executive Summary

Double Stack Container Systems: Implications for U.S. Railroads and Ports - Bibliography

Vehicle Track Interaction Truck Hunting

In an effort to better understand the practical aspects of the truck hunting response of two typical freight vehicles, a Federal Railroad Administration (FRA) test program was conducted at the Transportation Test Center (TIC). Axle and carbody accelerations were measured on a conventional design...

Stub Sills on Tank Cars

The results of this study indicate that the head brace repair procedure provides an effective means for redirecting stub sill loads into the tank body, thus reducing stresses at the critical sill-to-reinforcing pad weld sites. Our analysis indicates that the stub sill to tank interface stresses...

Inverter-Controlled ac Induction Motor Propulsion System Volume II: Final Report

An inverter-controlled ac induction motor propulsion system for rail transit cars was designed, developed, and tested to verify projected benefits and applicability of ac over conventional dc cars. Two New York City Transit Authority (NYCTA) R-44 dc subway cars were retrofitted with prototype ac...

Inverter-Controlled ac Induction Motor Propulsion System Volume I: Executive Summary

Evaluation of Locomotive Cab Air Flow Meters for Train Air Brake Leakage Monitoring

Railroad freight train brake systems must be qualified for safe operation by meeting three brake pipe test criteria: (1) a minimum pressure of 60 psig at the rear of the train, (2) a maximum pressure gradient of 15 psi over the length of the train, and (3) a maximum leakage of 5 psi per minute...

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...

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