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- Dec 4, 2017
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To run a PTO generator, you're going to need a very large water wheel.If you have a spring that does not flow enough to power a water wheel build a dam, use it to drop water over a paddle wheel and use an old truck transmission with a heavy fly wheel and spin weight brake governor to get constant a 540 RPM for a tractor pto alternator.
I used this site for the calculation.
http://www.timbertoolbox.com/Calcs/waterwheelHP.htm
You can play with the numbers but using my entries, you're going to need a 20-foot wheel, and at least 5000 gallons per minute to power a moderate size generator.