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Old 08-21-2012, 10:41 PM   #4 (permalink)
Sven7
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Make the structure out of aluminum bar and bend a couple transverse ribs to shape- 6" should work quite well. Then when you put the coroplast on it will conform to the curves you want. No, it won't have compound curvature, but it'll be "good enough" without going into fiberglass.

Of course you could get close to compound curvature by making really slim V slits on the sides and curving it in just slightly like a lobster tail. That would take a lot of work, though. Go for good enough now and if it works well, make version 2 even better.

Try it at 20 degrees from level and tuft test it. If flow is not attached lift it 2 or 3 degrees and try again. It should work best somewhere between 15-20*
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