Does anyone have any input on the physics of tire grip and what is really happening at the contact patch (CP)? I have read Chuck Hullman's SAE paper and his theory of delayed localized heating at the contact patch. How does CP area relate to overall laterial grip since friction is the normal load*mu? Would not an increase in air presssure reduce the slip angle by stiffening the torsional component of the tire? How does air pressure affect overall grip? Is it the tire spring rate change or a change in the contact patch size?
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