Join Date: Oct 2009
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Personally I think that's an awful idea - not only would maintenance access be difficult, it would look hideous and it would be hard to sail: besides the weight, the added wind resistance at the top of the mast would heel the boat excessively.
A friend of mine put a windmill on his Cal20 by mounting a pole on the transom, which puts the blades away from the sailor and still allows easy access. He rigged a system so he can unplug and easily remove the turbine when he wants to race or just play - works pretty well. You might look at that idea.