"Wally" wrote in message news:tbnOa.4848

But the air on each side behaves differently, does it not? On the leeward
side, it's passing over a convex shape, on the windward, is it getting
fouled inside a concave shape? If so, isn't there a case for saying that
the
air within the convex

Brain slip - should be "... air within the concave ..."


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Wally
I demand rigidly-defined areas of uncertainty!
www.art-gallery.myby.co.uk