Thread: Bi plane wing
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Old 11-22-2020, 08:48 AM
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I'm surprised by some of the airfoil thicknesses stated here. I heard biplanes often have thinner airfoils. But are they really as thin as 9%? A rough measure of a BJ Craft Encourage showed ~13% at the root to ~11% at the tips. Am I reading this correctly, or are there other factors that make thinner more desirable?

What would the expected effect be of thicker airfoils on the biplane?