well, I bought a bike speedometer and calibrated it for my rotor, so doing bench tests and getting rpm is pretty easy.
so, I'm thinking we will do that, add a layer of magnets to the disc, and see how the cut in improves.
When we measured rpm, we hit 9 volts at 125 rpm. Now, when it is up on the tower, we I measure the voltage output at the base, and we are almost always hitting 9 volts, just a stiff breeze does that. But, I hardly ever see it hitting 12 volts, it needs a very good wind to do that.
It hits 12 volts at 170 rpm.
So, I'm hoping that we can improve the cut-in with the second layer of magnets and aim for 110 rpm for 12 volts. If We can get that, then we can resin the second layer of magnets in place or make whole new discs with the 1/2" thick magnets.
In either case, the second layer test should tell us a lot.