Re: Driver size and speed

trainrider47 Wrote:
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> The formula would be C X (pi) X D X60/5280 X 12.
> Where C is the rotational constant. I've used 536
> in the examples above. D is the diameter of the
> driver in inches.
>
> Michael Allen

I looked the formula and miss-read it. I had forgotten about the rule to do the all the multiplication before doing the divisions

The explaination is:
distance per stoke (circumference of driver) x rotational constant x conversion to feet x conversion to miles x conversion to hour
D [in inches] x Pi x C x (1 ft/12 in) x (1 mile /5280 feet) x (60 minutes/hour)

D x 3.1416 x 536 x 60 = miles per hour
12 x 5280

Brian Norden