Quote Originally Posted by firebird77clone View Post
Spears beat me to it, and I'd lean towards his #s.
Your's are there too, Firebird, it's just that I had a couple of more decimal places on the value of pi or something. And for those who question the "336" it's:

(5280'/mile X 12"/ft)/(60minutes/hr X 3.141593 diameter to circumference), or 63,360 divided by 188.4956 yields 336.135240, so I round to 336 and call it good.