Quote:
Originally Posted by Paul Workman
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WV: I must be staring right at it but do not see: where is that "336" factor you use in your calc's derived from?
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Why the 'fine print?
I've used the 336 number for years and I don't know where I got the formula for it originally but there's explanations and the formula scattered about of all places "The Internet".
I found this explanation since you asked your question and it seems pretty concise and easily understood too, I'll just post the link. I believe it should work. Regarding explaining it 'simply'? I thought I did. Understanding it? Yes I do.
There are calculators that are used by many that aren't accurate and I just displayed my math, that doesn't have anything to do with understanding or simply. There are some RPM/MPH charts in this thread and all use 'advertised' tire specifications and not a 'loaded radius' it appears. I couldn't make the numbers match unless I used the 'advertised' dimensions.
http://www.numericana.com/answer/formula.htm#carspeed