I guess for me, getting this old thing running again.
It's a Jacobs 23 foot turbine that I converted to battery charging. But it never worked out. It needed to run at 180 volts to put out the full rated 10 kW @ 25 mph wind speed. The old grid-tie inverter for it was blown the but the multi-tap transformer in it was still good. Even stepping that down with a transformer ended up being 350 amps, which our battery bank couldn't take.
I tried backing the governor springs off and that didn't work either. The springs were too loose and the blades rattled all the time. That was hard on the blade sleeves.
When I got it it had all the blades blown off it and the governor blade shafts were all bent. I pulled the 1.25" governor off it and put on a 1.75 with new blades. I tore the gearbox down and machined dual snap ring grooves in the mainshaft for the ring gear too, because the snap ring got folded over when the blades hit the tower. I also replaced the old truck u-joints in the driveshaft with LoveJoy couplers, replaced the old steel disc brake rotor with a new cast one, and a bunch of other upgrades to it.
In the end it was a lesson on why wind turbines larger than 12 feet in diameter aren't practical for battery charging applications. They're great in light winds. When the wind blows you got enough power to run a small town. Unless you got a "otherpower" 20 foot turbine and then the generator stator goes up in smoke and saves the day. A Jake 23-10 don't go up in smoke. It puts everything else it's hooked to up in smoke.
I still got the turbine but I'm not running it. It was a constant headache worrying about a 20 mph gust coming along and melting everything I own into a molten glob. Even though it didn't work, it was still fun getting it running after it sat on its tower for 19 years with no blades on it.
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Chris