Railway Track & Structures 12/07 - (Page 37) Wheel climb Figure 1, above. Nadal's assumed force distribution at the flanging wheel/rail contact. Figure 2, right. At incipient wheel climb, the L/V values on the flanging and non-flanging wheels are, for positive angles of attack, separated by a roughly constant value equal to the Nadal limit plus the coefficient of friction on the top of the low rail. Understanding wheelclimb derailments FRA supported several studies of wheel climb that focused on applying existing models to generate practical understanding of wheel climb for lay persons. by Yan Liu and Eric Magel, Centre for Surface Transportation Technology, National Research Council, Canada. D espite ongoing study and review, wheel climb continues to be a persistent problem and pose serious challenges for commuter and freight railroads alike. A March 2000 incident in Japan that resulted in five deaths and several non-fatal, though equally troubling, incidents in the northeastern United States, e.g., the WMATA derailment in January 2007, 1 dramatically underscore the issue. Seeking an im- Impact Wrench Vibration isolated handle proved understanding of wheel-climb phenomena, the Federal Railroad Administration has supported a number of theoretical and practical studies on the subject, including the work of the authors that focused on applying existing 1805 2nd Avenue North, Moorhead, MN 56560-2310 218.236.0223 / portaco.com www.rtands.com PortaCo, Inc. builds a wide variety of standard hydraulic power units and tools as well as custom design power units to meet your particular needs. • Stand-up handle design provides ergonomic operator posture • Toe plate for secure operation • Fitted with hose whips and couplers • Rugged steel construction • Low weight to power ratio • 2800 foot pounds of torque - removes the most rusted bolts Railway Track & Structures December 2007 37 http://www.rtands.com
Table of Contents Feed for the Digital Edition of Railway Track & Structures 12/07 Railway Track & Structures - December 2007 Contents On Track Industry Today Supplier News AREMA News NRC News TTCI R&D Hand-Held Tools Provide the Power to Get Big Jobs Done AREMA C&S Update Striving to Solve the Riddle of Wheel Climb RTA Stages Warm Gathering in Sunny Florida in October Products and Literature People Calendar Website Directory Advertisers Index Sales Representatives Professional Directory Classified Advertising Chicago Perspective Railway Track & Structures 12/07 Railway Track & Structures 12/07 - Railway Track & Structures - December 2007 (Page Cover1) Railway Track & Structures 12/07 - Railway Track & Structures - December 2007 (Page Cover2) Railway Track & Structures 12/07 - Contents (Page 1) Railway Track & Structures 12/07 - Contents (Page 2) Railway Track & Structures 12/07 - On Track (Page 3) Railway Track & Structures 12/07 - On Track (Page 4) Railway Track & Structures 12/07 - Industry Today (Page 5) Railway Track & Structures 12/07 - Supplier News (Page 6) Railway Track & Structures 12/07 - Supplier News (Page 7) Railway Track & Structures 12/07 - Supplier News (Page 8) Railway Track & Structures 12/07 - Supplier News (Page 9) Railway Track & Structures 12/07 - AREMA News (Page 10) Railway Track & Structures 12/07 - AREMA News (Page 11) Railway Track & Structures 12/07 - AREMA News (Page 12) Railway Track & Structures 12/07 - AREMA News (Page 13) Railway Track & Structures 12/07 - AREMA News (Page 14) Railway Track & Structures 12/07 - AREMA News (Page 15) Railway Track & Structures 12/07 - AREMA News (Page 16) Railway Track & Structures 12/07 - NRC News (Page 17) Railway Track & Structures 12/07 - NRC News (Page 18) Railway Track & Structures 12/07 - NRC News (Page 19) Railway Track & Structures 12/07 - NRC News (Page 20) Railway Track & Structures 12/07 - TTCI R&D (Page 21) Railway Track & Structures 12/07 - TTCI R&D (Page 22) Railway Track & Structures 12/07 - TTCI R&D (Page 23) Railway Track & Structures 12/07 - TTCI R&D (Page 24) Railway Track & Structures 12/07 - TTCI R&D (Page 25) Railway Track & Structures 12/07 - TTCI R&D (Page 26) Railway Track & Structures 12/07 - TTCI R&D (Page 27) Railway Track & Structures 12/07 - Hand-Held Tools Provide the Power to Get Big Jobs Done (Page 28) Railway Track & Structures 12/07 - Hand-Held Tools Provide the Power to Get Big Jobs Done (Page 29) Railway Track & Structures 12/07 - Hand-Held Tools Provide the Power to Get Big Jobs Done (Page 30) Railway Track & Structures 12/07 - Hand-Held Tools Provide the Power to Get Big Jobs Done (Page 31) Railway Track & Structures 12/07 - Hand-Held Tools Provide the Power to Get Big Jobs Done (Page 32) Railway Track & Structures 12/07 - Hand-Held Tools Provide the Power to Get Big Jobs Done (Page 33) Railway Track & Structures 12/07 - Hand-Held Tools Provide the Power to Get Big Jobs Done (Page 34) Railway Track & Structures 12/07 - AREMA C&S Update (Page 35) Railway Track & Structures 12/07 - AREMA C&S Update (Page 36) Railway Track & Structures 12/07 - Striving to Solve the Riddle of Wheel Climb (Page 37) Railway Track & Structures 12/07 - Striving to Solve the Riddle of Wheel Climb (Page 38) Railway Track & Structures 12/07 - Striving to Solve the Riddle of Wheel Climb (Page 39) Railway Track & Structures 12/07 - Striving to Solve the Riddle of Wheel Climb (Page 40) Railway Track & Structures 12/07 - Striving to Solve the Riddle of Wheel Climb (Page 41) Railway Track & Structures 12/07 - RTA Stages Warm Gathering in Sunny Florida in October (Page 42) Railway Track & Structures 12/07 - People (Page 43) Railway Track & Structures 12/07 - Calendar (Page 44) Railway Track & Structures 12/07 - Website Directory (Page 45) Railway Track & Structures 12/07 - Sales Representatives (Page 46) Railway Track & Structures 12/07 - Professional Directory (Page 47) Railway Track & Structures 12/07 - Classified Advertising (Page 48) Railway Track & Structures 12/07 - Classified Advertising (Page 49) Railway Track & Structures 12/07 - Classified Advertising (Page 50) Railway Track & Structures 12/07 - Classified Advertising (Page 51) Railway Track & Structures 12/07 - Chicago Perspective (Page 52) Railway Track & Structures 12/07 - Chicago Perspective (Page Cover3) Railway Track & Structures 12/07 - Chicago Perspective (Page Cover4)
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