At 21:29 10/04/98 -0400, you wrote:
>... rotate the driveshaft
>until you get a full turn of the wheel. multiply this times 2 and that
>is the ratio (you have to interpolate a little) ...
>the same spitfire with a 4.1 diff would take just a little more than 2
>turns of the driveshaft - 2= times 2 = 4+ or 4.1. this work for any car
>. you just need to know what ratios were available.
You could rotate the driveshaft 20 times, then divide the result by 10, to
improve the precision of the measurement! In the above example, you would
get exactly 41 turns of the wheel, and divide by 10 for a ratio of exactly 4.1.
Allen Nugent
Graduate School of Biomedical Engineering
University of New South Wales
Sydney 2052 Australia
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