A wainwright original now an artifact on the wall.
The new: Machined stainless hubs with included angle for spokes, and welded to rolled 1" stainless tube "tire." hubs get special end caps with welded shaft collars.
These are special brackets to mount the windmill speed control to the outside of the tower. A hydraulic motor that couples to the windmill bearing shaft slows the rotation by resistance of the hydraulic fluid.
This tower is 26 ft tall, welded construction, ready to be hot-dipped galvanized.