Playing with wind power

[J57ltr]

So it's always windy here in Tomball at my house and I have been playing with the idea of a small wind generator. The type I have been looking at are the ones that look like a cylinder cut in half and then set up so it looks like an "S" so it picks up wind in any direction. I was thinking of something small scale just tinkering. But the ones on the Net the guys are assembling the stator and magnets separately which seems like a huge waste of time to me for efficiency that probably isn't that good.

So my idea is to use a brushless motor as the power device, my question is, what Kv? I have noticed that if I short the windings together that the back emf increases the amount of torque required to turn the shaft (obviously). I have also noticed that the lower the Kv the harder it is to turn, Which makes since because there are more windings turns in a lower Kv motor allowing for a higher voltage to be generated for a given RPM. So the motor would need to have enough voltage to be able to charge the battery (probably a 12V for now), but not stall the windmill. I know that my 7700 is super easy to turn with the leads shorted. I also notice that the braking is less as my overall gear ratio decreases, so I have to up the braking force, (I understand why).

I guess first I need to figure out what RPM the thing will spin and the voltage produced at that speed. I already have a 3phase bridge rectifier from another project (Alternator welder). So what do you guys see as a problem or suggestion?

Jeff