Scott Cummings


Motivation and Development of the AAR-2A Wheel Profile
Wheel/rail life extension can be achieved by better control of wheel and rail profiles and maintenance procedures. A new wheel profile (AAR-2A profile) was designed to improve vehicle curving performance and reduce RCF and wear of the wheel and rail in the early stage of wheel life. In 2016, AAR’s WABL committee voted to allow the AAR-2A as an alternate wheel profile for turned wheels with the stated intention of eliminating the AAR-1B profile effective January 1, 2019. This presentation provides an update on the current status of this initiative.


About Scott Cummings

Scott Cummings is a Scientist at the Transportation Technology Center, Inc. where he currently manages rolling stock and vehicle/track interaction research projects. His 20-year tenure at TTCI includes focus in the areas of vehicle dynamic behavior, wheels, air-brakes, longitudinal train dynamics, and rail grinding. He has written more than 100 technical papers and reports. Through TTCI’s employee exchange program, Scott had the privilege of spending a year with Norfolk Southern’s Research and Tests group investigating derailments and issues associated with maintenance-of-way. Scott holds a BS in Mechanical Engineering and an MS in Industrial and Systems Engineering.