Quote:
Originally Posted by Pete_vB
Tires also slip longitudinally for the same reasons as they slip laterally, and in fact if there is no slip there is also no friction. It's often referred to as "slip ratio" longitudinally, and can be as high as 20% at peak traction. Some of those great slow motion videos of dragsters taking off show it in action very well.
For some more background read this about traction control:
http://www.motortrend.com/features/p...ction_control/
Or this PDF paper on tire modeling describes it on page 5:
http://www.engr.colostate.edu/pts/Jo...20Modeling.pdf |
For an optimal launch on a dragstrip, some wheel spin is helpful. However, once launched, the only time you have wheel spin is when you're employing power-on oversteer -- great for drifting but generally not the quickest way around a road course.
Neil