By Gary Wolf • January, 2006 Railroad engineering managers have been struggling with the problem of how much elevation to place in a curve since the first steam engines started turning a wheel. While the physics and calculus of the matter seem straightforward, the application of those formulas is where problems …
By Bob Tuzik • May 26, 2005 The Federal Railroad Administration’s Office of Research and Development is not the best known R&D organization in the industry, but it is one of the most important. It’s work figures prominently in rulemaking and the regulatory process for the industry. That role is …
By Gary Wolf • February 1, 2005 It’s said that “it takes two to tango,” but it takes three critical elements to induce harmonic rock and roll: • An operating speed between approximately 12 and 24 mph. • A vehicle conducive to rocking due to its mass and spring characteristics. • …
By Gary P. Wolf • January 1, 2005 Part 1 of “Effects of Wide Gauge on Derailment Potential” examined how wide gauge occurs, some of the symptoms and reasons why wide gauge is undesirable. Part 2 of this article explores how to correctly measure gauge and properly identify wide gauge …
By Gary P. Wolf • December 1, 2004 “Wide gauge” is one of the most often used FRA derailment codes. In 2003, 254 derailments were reported to have been caused by wide gauge (FRA code T110 or T111). This represents nearly 13% of all derailments reported to the FRA, and roughly …
By Jeff Tuzik • July 2010 Wheel/rail interaction is complex, variable and difficult to manage — especially on rail transit systems where noise, vibration and ride quality present daily challenges. As a result, managing the wheel/rail interface requires constant attention and innovation. Speakers at Advanced Rail Management’s Rail Transit 2010 …
By Mike Gilliam and Russell Rohlf • October 2010 Optimizing friction management is an ongoing project on Union Pacific. Gauge-face (GF) lubrication is a long-standing program, but it requires an additional 400 units to reach optimum efficiency. A large number of top-of-rail (TOR) units are needed, as well, as UP is only beginning …