Technical Reports

Safety of High Speed Magnetic Levitation Transportation Systems - Preliminary Safety Review of the Transrapid Maglev System

The safety of various magnetically levitated trains under development for possible implementation in the United States is of direct concern to the Federal Railroad Administration. This report, one in a series of planned reports on maglev safety, .. 'addresses safety issues related to a specific...

Statistical Representations of Track Geometry Volume I- Text

Mathematical representations of railroad track geometry variations are derived from time series analyses of track measurements. Since the majority of track is free of anomalies (turnouts, crossings, bridges, etc.), representation of anomaly-free track is first considered. Anomalies are then...

Railroad Passenger Ride Safety

Safety requirements for high cant deficiency rail passenger service address the dangers of vehicle derailment, track damage and unreasonable risks to standing passengers of falling. Safety criteria concerning vehicle derailment and track damage have been well developed. Those applicable to...

Peacekeeper Rail Garrison Test of LCC Launch Car, EMS-2

Tests were performed on the Peacekeeper Rail Garrison Launch Control Car(LCC), EMS-2 according to specifications in Chapter XI of the AAR's, Manual of Standards and Recommended Practices. The tests included vehicle characterization, service worthiness, and track worthiness. These tests address...

Analytical Methods for Freight Car/Truck Dynamic Problems

The analytical methods used to synthesize mathematical models of an 80-ton open hopper railroad car are presented in this report. The work described herein was performed as part of the Track-Train Dynamics program by the Analytical Mechanics Section, Martin Marietta Corporation, Denver Division....

Railroad Rail Flaw Detection System Based on Electromagnetic Acoustic Transducers

This report describes the design, construction and preliminary testing of an ultrasonic inspection vehicle intended for the detection of flaws in railroad tracks that are in commercial service. It differs from existing inspection systems in that it employs an ultrasonic transducer that does not...

Track Component Property Tests Volume II- Rail, Ties, Joint-Bars and Fasteners - Interim Report

The principal objective of this laboratory test program is to investigate the load capacity of track in the vertical and lateral planes to support assessments of track strength.

Railroad Car Coupling Shock, Vertical Motion, and Roller Bearing Temperature

Data were collected in a study of railroad car operating environment. Measurements were made on wheel bearing operating temperatures, coupling impact shock, and vertical motion of the car due to rail travel. Tests were conducted using an instrumented consist at the Transportation Test Center (TTC)...

High Cant Deficiency Test of the F40PH Locomotive and the Prototype Banking 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. Tests were performed on the F40PH diesel-electric locomotive and an Amcoach modified for banking, with and...

Structure and Properties of Thermite Welds in Premium Rails

Thermite welds were used to join combinations of premium rails and AREA Controlled Cooled Carbon rails (i.e., standard rails). The premium rails comprised head-hardened rails and CrMo, CrV and Cr alloy rails. A major objective was to determine the feasibility of joining premium rails to each other...

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Technical Reports