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04-22-2014 04:53 AM #6
Ok, here is what I got:
1 mph equals 88 fpm
160 mph equals 14,080 fpm
31" tire equals 8.1 feet circumference
14,080 divided by 8.1 equals 1736 rpm
7,000 rpm : 1736 rpm equals .248
1 divided by .248 equals 4.032
SO , 4:1
Calculated, 7,000 rpm times .25 yields 1750 rpm.
1750 rpm times 8.1' equals 14175 fpm divided by 88fpm yields 161 mph..
Education is expensive. Keep that in mind, and you'll never be terribly upset when a project goes awry.
EG





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