I'm sorry if this is a common request, but I couldn't figure out how to do a search that would give me an answer for my particular situation. Basically, I would like some advice as to the amount/gauge of wire to use in my brake disc alternator. This is what I have so far: 12 circular Neodymium magnets, N38, 2" diameter, 1/4" thick. A brake disc that will fit these magnets (I haven't put them on yet, but I used 2" cardboard cutouts to make sure there was enough room). To be honest, I am not exactly sure what the fate of this windmill will be (it's sort of an experiment), though I realize that is an important consideration. So for the sake of building something that might be useful for producing power, I will say that I am building a 12 volt machine that should be capable of starting in low winds. (I live right about in the middle of Iowa, an area that is considered "good" for wind power capacity. There is some commercial wind power production closeby. However, I live in a suburban area so I don't know if I could take full advantage of all that wind.) Any advice about what wire gauge, wiring configuration, and prop size combination would work best for me would be much appreciated. I just need a general idea. Thanks.