On Fri, 30 Nov 2001, Kevin Stevens wrote:
> > Where did I go wrong?
>
> Well, your choice; either your definition of "toe", or your triangle
> base. You're calculating the short side of a triangle with hypotenuse
> equal to the diameter, which isn't normally how you do it; you perform
> calculations from the center of a circle, not the opposite point of the
> circumference. So for your calculation you'd use 12.65 instead of 25.6,
> and come out with around half your value in degrees (don't have a sci
> calc handy), which would correspond to my calculation. That's for one
> wheel, multiply it by two for both wheels. Multiply it by two again if
> your using a definition of "leading edge track minus trailing edge
> track", because you're measuring both the variance in front and the
> variance in back (which will be equal if your rims are true!).
The diameter is a red herring. The pi stuff comes in
because that formula converts degrees to radians.
Pete
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