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My concern is the shape of the foil. When comparing to standard NACA foils, it measures as a NACA 0010 foil, but the leading edge is narrower than the true foil shape by about 1/4 inch. The leading edge of a foil can be modeled by a series of overlapping circles, and the radius of these is...

Thanks for your response. Helpful. I found Paul Zander had posted an article on Centerboards and rudders in 2010. Apparently, the correct NACA0010 shape would improve performance at wider angles of attack. I also learned he was experimenting with an parallel sided foil which moved the AOA...

I damaged my Corsair F28R daggerboard sailing in Mexico in the Spring. Because replacements are pricey, am planning to repair it. Had a neat plan and was about to put it into action when I determined that I wasn't sure what the original foil shape was. The foil is similar to a NACA 10 foil...