General

Rock Fracture Research- Surfactants

In order to reduce the resistance of hard rocks to excavation by available cutters, and in order to reduce wear on cutters and thus to increase the efficiency of conventional tunneling machines and thus improve their rate of advance in hard rocks, surface active agents have been studied in...

Resistance of a Freight Train to Forward Motion- Volume II, Implementation and Assessment

This interim report is a supplement to a previous report and documents the results of the second portion of an investigation of the train resistance phenomenon. This portion of the effort was specifically directed toward determination of possible fuel savings to be effected through certain design...

Report on the 5th International Wheelsets Congress

A summary is given for each of the thirty technical papers presented at the International Wheelsets Congress held in Tokyo, Japan, 20-23 October 1975. The papers were presented by international experts in rail research and covered a wide range of wheel/rail topics, including dynamic forces,...

Report of August 1977 U.S. Railroad Delegation's Visit to the U.S.S.R. to Study Soviet Rolling Stock Technology

This report summarizes the obervations and findings of a seven-member delegation that visited the U.S.S.R. in August 1977 to participate in the sixth meeting of the Joint American-Soviet Railroad Working Group and to study and observe Soviet practices, procedures, and equipment used in designing,...

Railroad Track Technology in the USSR: the State of the Art

Report contains limited assessment of the present state of the art of railroad track research, construction and maintenance technology in the U.S.S.R. It synthesizes the observations and opinions of a six-man team of U.S. railroaders which visited the Soviet Union during a 12-day period in the...

Railroad Tank Car Fire Test: Test No. 7

A fire test was conducted on a one-fifth scale model pressurized railroad tank car on 7 February 1973, The test, designated as Test Number 7, was conducted by the Ballistic Research Laboratories for the Federal Railroad Administration of the United States Department of Transportation at the White...

Railroads and the Environment: Estimation of Fuel Consumption in Rail Transportation- Volume III: Comparison of Computer Simulations with Field Measurements

This report documents comparisons between extensive rail freight service measurements (previously presented in Volume II) and simulations of the same operations using a sophisticated train performance calculator computer program. The comparisons cover a variety of lengthy freight movements over a...

Technical Report Passenger Vehicle Braking Study

This report is a summary of currently available brake components and braking systems that might be applicable to 150-mph passenger service. The summary includes an analysis of the braking problem, a description of braking systems now in use and an evaluation of severa1 advanced braking systems. The...

Organization of a Simple Dynamic Model of a Railroad

This investigation was concerned with techniques for determining values of damping and spring constants that would minimize the vibrations transmitted from irregular railroad track to passenger positions. Results developed for a three degree- of-freedom model using a simplified representation of...

On the Stress Analysis of Rails and Ties

The report first reviews the methods presented in the literature for the stress analysis of the railroad track components and the results of a variety of validation tests. It was found that the equation Eiwiv + kw = q yields deflections and bending stresses in the rails of longitudinal-.tie and...

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General