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Dynamic Traction Characteristics of Tires
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 02, 2002 by SAE International in United States
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Shifting weight forward in a racecar to improve turn in is a known fact. Not only NASCAR and CART crew chiefs use this phenomena but Milliken & Milliken 1, Carroll Smith , and other authorities state this fact in books. The “classic” tire side force variation with load curve at a constant slip angle shows side force increases less than load. The “classic” tire side force/load curve, which is real data, does NOT agree with the facts known to crew chiefs AND authorities in the field of tires. A different tire model that includes slip heat generation is used to show that BOTH statements above are correct, but at different times in a corner. The reason for the change in tire traction is heat generated in the contact patch and a change in surface temperature of the tread rubber.
CitationHallum, C., "Dynamic Traction Characteristics of Tires," SAE Technical Paper 2002-01-3302, 2002, https://doi.org/10.4271/2002-01-3302.
- Race Car Vehicle Dynamics Milliken W.F. Milliken D.L. 1995 SAE International
- Engineer In Your Pocket Smith Carroll 1998 SAE International 0-9651600-1-7
- Tires, Suspension and Handling Dixon John C. Second 1996 SAE International
- Fundamentals of Vehicle Dynamics Gillespie Thomas D. 1992 SAE International
- Mechanics of Pneumatic Tires Clark Samuel K. U.S. Department of Transportation, U.S. Government Printing Office
- Fast Rubber Wright Peter Racecar Engineering April 2002 12 4
- SAE 983028 Understanding Race Tires Hallum Chuck
- SAE 2000-01-3571 How to Work NASCAR Tires Hallum Chuck
- Accurate Tire Models for Vehicle Handling Using the Empirical Dynamics Method Renner T.E. Barber A.J. MTS Systems Corp. 2000 International ADAMS Users Conference