Thanks for all the input. Very much appreciated. Gives me some ideas on which changes would be to the best.
I have attached a few pics of my on site testing to better describe my set up.
I do have a 1 1/2" "nozzle" at the end. I tried a 2" but measured less output and went back to the 1 1/2" .
You are right about the belt and losses associated. We are going to try a flat belt to reduce the losses.
I went with the pulleys so I could easily change ratios to get the best RPM to torque. After the initial test I found that I could change the bottom pulley from a 6" to a 9" and the top one from a 3' to a 1 1/2". This change boosted RPM on the PMM but still had enough torque to keep running when load was applied.
The main reason my hub/blades are so big is that I wanted blades big enough to catch the output from a 1 1/2" nozzle but I would put more blades on if I were to build another one.
The PMM, I am using, was donated and I don't know much about it. The information plate on it says rated for 200 watts and 2.5 amps. It is pretty small and you can
just feel the magnets cog when you turn it by hand.
Recent testing measured 46 VDC (open circuit) and 2.6 amps when charging a deep cycle battery. Maybe that's all I'll get out of it? How many watts is that? Is it 2.6 X 14 = 36.4 or is it calculated as 2.6 x 46 = 119.6?
Once again all input is appreciated.
If interested I have posted a video of the unit running at
http://www.youtube.com/watch?v=XQ3ysu0Nx-A