Look into: dc treadmill motors Runner for alternator Hydro-power alternator runner Permanent magnet alternator Permanent magnet motor low speed Pm-1000 PMG alternators Francis Impulse Turbine A number of alternator builders/rebuilders are offering PM conversions or new PMG alternators especially for marine applications. I think a lot of the new 42 volt auto alternators will also be PM for improved efficiency. I am not sure what will be required to regulate the output, but there should be some kind of internal regulation available. Some inexpensive PWM electronics could regulate voltage over a wide range of RPMs. The vehicle's computer could regulate it, tho....... Homebrew Hydro Electric http://www.otherpower.com/scotthydro1.html effecentcy of water power methods http://www.i4at.org/countrylife/waterpower.html harris turben water flow Data good http://www.bitterrootsolar.com/hydro/harris.htm Water Baby micro hydro http://www.rpc.com.au/reindex.html?http://www.rpc.com.au/products/hydropower/waterbaby/waterbaby.html pm alternators http://www.hydrogenappliances.com/powerpmas.html http://www.hydrogenappliances.com/pmacurves.html Regulator for Permanant Magnet Alternators http://www.otherpower.com/pmgreg.html Permanent Magnet Brushless 3 Phase Alternators http://www.windstreampower.com/generators/PMA.html http://www.windstreampower.com/generators/Torque.html At 500 watts and 1800 rpm tourk is 2 lb-ft or 12 lbs on 4? runner. Motor dimensions calculator -- Bowman Magnet Motor Open Sourcing Project http://www.pureenergysystems.com/os/MagneticMotors/BMM/plans/specs/dimension_calculator/index.html if you want to buy one, please check here: http://www.windmission.dk/PMG/pmgforeveryone.html If you want make one from scratch, please see http://www.otherpower.com 'volvo' generator. We made one quite similar here, it wasn't very difficult, after we got the right materials. If you want to rewind a car alternator, please see: http://www.mtmscientific.com/rewind.html The job itself isn't very difficult. You only need to rewind the stator coils with thinner copper wires. The same way as they were, but more turns. If you want to try a conversion of a car alternator into pmg, please see: http://www.windstuffnow.com - Hannu Magnets http://www.magnetsrc.com/ windmills and more very good. http://www.hydrogenappliances.com/ Watts expected from a water flow. http://www.greenhouse.gov.au/yourhome/technical/fs49.htm micro-hydro pelton wheel Harris unite http://www.scsolar.com/microhydro.html better prices http://www.backwoodssolar.com/Catalogpages2/hydropower2.htm Harris Hydro pelton with Motocraft 80 amp alternator - 1 nozzle http://www.dunsolar.com/MicroHydro.asp?InfoType=MHP not done where to order pelton wheels and a good practical write up for designing. http://www.suntrekenergy.com/hydro.htm plastic $195 ES&D Plastic pelton runner http://www.energyalts.com/catalogue/Items/ESD4P-B.htm ES&D Turgo Runner ? Bronze $526.68 http://www.perfectpowernetwork.com/Product/877/T1,0008,0024/ESD-Turgo-Runner--Bronze.htm Harris Bronze Pelton Wheel $275.00 ESD Pelton Wheel $113.00 ESD Turgo Wheel$737.00 http://www.tophatenergy.com/price_products_list.htm links to hydro http://www.timsbrain.com/Environmentalism/Renewable_Energy/MicroHydro/Online_Stores/ not done good for home built knowlage.3 phase AC induction motors www.renewablepower.com/files/homepower.pdf Micro hydropower basics http://www.microhydropower.net/turbines.html not done yet Turgo runners & components for DIY micro-hydro http://h-hydro.com turgo_gen Nautilus Low Head Turbines This site describes the turbines built by Nautilus Water Turbine Inc http://www.waterturbine.com microhydro@... Rainbow Power Company Ltd Australian Renewable Energy supplier- has large FAQ, BBS & Newsletter http://www.rpc.com.au davel70 Wasserkraft-Forum A little forum in german for all kinds of informations, commercial and technical - ein kleines Forum auf deutsch fr alle Art von Informationen, Kauf/Verkauf und technisch http://wasserkraft-forum.de.tf magnus_bon micro hydro pages of Upali I have long been interested in Micro-Hydro power. I found this egroup.com/micro hydropower group. In future I hope to start a micro hydropower project. So I think this will be very useful for me and others to share our knowledge/information. http://start.at/microhydro