Re: understeer/oversteer definition

["Rob Lloyd" <rclloyd@ix.netcom.com>]

Actually, that's true. Coeffecient of friction actually goes down with
increasing normal load. The CF is always positive though, so the maximum
lateral force is always proportional to the normal force. (IE, more vertical
load gets you more max lateral force, just at a dcreasing rate.)
Intrestingly enough, on race tires, the CF is often greater than 1. Figure
that one out.

Rob Lloyd
'93 90 CSQ


>Group- I can not comment on the veracity of the above description. I do
>remember some Physics  however, and twice in the explanation it is
mentioned
>that "the greater the vertical force, the greater the coefficient of
friction"
>I think it is more proper to say that the greater the normal (vertical)
force
>the greater the friction force. I suspect that the coefficient of friction
>between tire and road is not a constant or simple relation. On an
>instantaneous basis though normal force times coefficient of friction is
what
>determines  the force of friction which is offsetting the centripetal
force. I
>await corrections which are sure to come.
>Frank Santoro
>1990V8 for sale
>1998 A8
>