I bought a 400W HAWT on Ebay. It has the plastic blades. A few photos are attached. I think the airfoil shape, at least at the tip, looks remarkably similar to the ones I made. Of course the chord is a lot less and they have twist and taper that mine don't. Both the leading and trailing edges are sharp all the way down. This particular turbine uses 6 of these blades bolted to a steel hub powering a modified GM 10SI alternator PMA. Total rotor diameter is 60".
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