RE: Here's A Simple & FREE First Foam Build Plan! (Part 2)
Another repost from Fisher with good info on the airfoil...
The leading edge is rounded to the bottom, so I had to extend the template beyond the edge of the base board to allow the hot wire to follow around template without getting caught. The intended bottom line of the airfoil template should be the solid horizontal line that begins under the leading edge curve and extends under the numbers. If you need me to I can have another go at making the template less ambiguous. Your observation regarding the wing thickness was right on. It should be about an inch think at the deepest point.
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I ended up using the wrong baseline for my airfoil but it still works good. I'm missing the curve under the leading edge, but I just use my oribital sander to sand that into the wing. Quick and easy. Remember that the airfoil should be 7" wide. Measure what you print out. More info on building the jig and hot wire tools later.