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Re: weight....

To: Robert Allen <boballen@sky.net>
Subject: Re: weight....
From: "W. R. Gibbons" <gibbons@northpole.med.uvm.edu>
Date: Sat, 11 Jan 1997 22:27:47 -0500 (EST)
On Sat, 11 Jan 1997, Robert Allen wrote:

> Tires, wheels, and suspension parts are considered unsprung weight.
> Everything else is sprung weight. The ratio of sprung to unsprung weight
> has an important effect on the handling of a car on bumpy surfaces, and
> is a factor in automobile design. A ratio of 5 is good and a ratio of 2
> is very poor.

snip

> Midgets handle better than 'B's, all things being equal, because the
> amount of sprung weight (the car) is a lot less while the unsprung
> weight (the suspension) is nearly the same. The ratio of sprung to
> unsprung weight goes up; the car seems more throwable in the corners.

Sounded good, up to the part about midgets.  If the car weighs less while 
the unspring weight stays the same, the ratio of sprung to unsprung 
weight goes down, not up, and according to your opening paragraph, the 
car should handle worse, not better.

WRG

   Ray Gibbons  Dept. of Molecular Physiology & Biophysics
                Univ. of Vermont College of Medicine, Burlington, VT
                gibbons@northpole.med.uvm.edu  (802) 656-8910


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