Neil, this is very interesting stuff. The only problem
is what does it mean to a race car? The salt
"condition" changes so rapidly from hour-to-hour, it
may be extremely difficult to get a handle on usable
data. That's why I suggested a data acquisition rig
(on the car) to at least get something usable.
John Goodman
--- "Albaugh, Neil" <albaugh_neil@ti.com> wrote:
> Mayf;
>
> "The Design Of Experiments" class again?
> Arrrggghhhhh...
>
> OK, once you know how much the salt surface deforms
> with a known load, you
> can find its compressive modulus (how soft or how
> hard it is) but if you can
> also determine its modulus of elasticity ( how much
> rebound it has), you can
> then use those two pieces of information to
> calculate how much energy loss a
> rolling wheel or tire will have. This would be a
> measure of parasitic
> horsepower loss-- in other words, the component of
> rolling resistance that
> is due to the salt itself, not the tires-- that's an
> additional loss.
>
> I have a feeling that I've raised an issue that
> isn't of much interest or
> importance but this may be one reason that running
> on salt is faster than on
> dry lakes. Anybody have any ideas about this?
>
> Regards, Neil Tucson, AZ
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