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Old 10-29-2008, 04:29 PM   #3 (permalink)
some_other_dave
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Most fabric will flap in the breeze, which will create more turbulence. You want something stiff enough that it won't move when air flows over it.

Fabric used on aircraft gets "doped" with a paint-like stuff, and turns into a pretty stiff substance. Most especially when used directly over a plywood skin, but also when merely stretched over stringers.

-soD
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