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I Actually put 2D/sinΘ in an earlier version of the PDF file. It was pointed out to me I was thinking in radius instead of diameter.
OK. Now I see the problem. See next post below. The copy of the file in this post is the old one. The correct one is in another post on the forum. I taken out the bad copy and put a link to the correct one in.
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Last edited by Unclenick; September 21, 2012 at 11:24 AM.