Ok I have lived on the sac river for a couple years and I have wanted to throw a turbine/wheel of some sort on it and pull power off it for some time now. where I live the river is around 5-10mph. Was thinking about building a small pontoon with a wheel or maybe a prop underwater. I have been looking at the 3000-5000w 300rpm AC220V Permanent Magnet Generator for around $1.5_2.5k . you guys think I could gear my prop or wheel enough to get that sucker to spin 5 times a second? I should probably build something on a smaller scale first like a 200w one but I am kind of a go big or go home type of person. I am not a complete spud and grasp almost all the aspects of these just feel like I could get some good input from ppl that have been there done that.