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About 20 mph to a *really* rough approximation. Thats working to the idea that there are only 1400 yards in a mile - which is obviously a source of much inaccuracy!
How accurate do you need it Charlie?
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[img]\"http://img1.ranchoweb.com/images/sproutman/certwist.gif\" alt=\" - \" /><br /><br /><i>\"And the angels all pallid and wan,<br />Uprising, unveiling, affirm,<br />That the play is the tragedy, man,<br />And its hero the Conquerer Worm.\"</i><br /> - Edgar Allan Poe
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