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That was fun to watch & think about.
Three points: 1) the rectangle didn't have the same cross section as the foil and the original rod, so the drag value really can't be compared.
2) the data about round vs airfoil was implicit in the drag value of the rod, even before the wire was tested.
3) I didn't calculate Reynolds number of this test - if I think of it, I'll check with Hoerner to see how close this test data matches.
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