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>What your trying to say is right, eric. You're just using the wrong
>terminology. In case you don't believe me (which is obviously the case),
>I'll quote directly from the Milliken and Milliken book, "Race Car
Sorry but what I am SAYING IS right.......
>"Tractive force FT and braking force FB are a function of slip ratio. As
>slip ratio increases (numerically)from zero, the forces rise rapidly to a
>maximum which usually occurs in the range of 0.10 to 0.15 slip ratio, after
>which the forces fall off."
>This is what you're saying. And quite honestly, I'm impressed with your
>accuracy on the 10% slip ratio. But in the next paragraph:
Well long conversations with and testing for tire companys will get you
the correct info....
>"For the traction case, note that the force falls off rapidly after the
>onset of spinning.", and "Once a tire exceeds the slip ratio for peak
>force in either traction or braking, it becomes unstable and the
>wheel tends to either spin-up (traction) or lock (braking)."
Meaning that they were spin to start with.............
>Thus my point - "slip" IS NOT THE SAME AS "wheelspin". It should be clear
>from these quotes (from an 890 page SAE publication no less) that
>maximum tractive force occurs at ~0.10 to 0.15 "slip ratio", but falls
>off dramatically with the onset of "wheelspin."
Is the tire turning faster than Road speed? Yes it is, and that my friend
IS Spin......... And I have made it clear that you need to keep the tire
at a delta V of 10% for max traction otherwise it goes up in smoke....
Looks like it's time to go back to class Jeremy.....
St. Louis, MO
- Re: Wheelspin
- From: "Graydon D. Stuckey" <email@example.com>