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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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Boundary layer -- yish
dimlpes on a golfball surrond the ball be cause it is always changing its orientation w.r.t. the air stream.
IF you know the direction of air flow you design for it.
Is that whats happening here?
__________________
Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong.
Disclaimer: the above was 2¢ worth.
More information is available as my professional opinion, which is provided for an exorbitant fee. 
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