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Old 03-23-2018, 08:06 AM   #41 (permalink)
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Originally Posted by gumby79 View Post
Tire slip is quantified by a formula known as the "Pacejka magic formula" developed primarily by the Dutch university professor Hans Pacejka. A curious aspect of this extremely complex subject is that some tire "slip" ( not sliding or wheelspin) is necessary for a tire to generate traction, and that there is an optimum amount of tire slip. This does not imply that wheelspin or skidding is desirable in land speed racing or in drag racing. .paterstreamliner.com/
As the tire wore out the volume of slip went down ?
Ah ..... Mmmmm ......

The Pacejka Magic Formula relates slip angle to cornering force generation. The website you quoted from is trying to relate Pacejka's "Magic Formula" to tire slippage in the tangential direction and that formula is not applicable. I'm not sure why they even brought the subject up as even their own words say there is some confusion about the terms used - and then they confuse the terms themselves!

And it certainly isn't applicable to the discussion above.


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