I am long on posting, and short on building, but...
I can't have a HAWT where I'm at, and just for fun, I fully intend to build a 3 drum Savonius. 2:1 timing belt and pulleys from a salvage yard car. A central pipe will form the backbone, and a spinning outer pipe will be supported by a tapered auto wheel bearing on the bottom (#BR5) and a common pillow block on top, such as are found at a farming equipment supply.
Drum halves attached to wood discs, which are attached to the outer spinning pipe.
3 drums will fit on a 10' section of pipe, and bell connectors will allow a slightly fatter pipe section to be threaded onto the bottom and top.
The upper section of pipe will be just tall enough to allow 3 guy wires at about a 45-degree angle.
My goal is a VAWT demonstrator capable of charging D and AA batteries for music and lights at night during a power outage. I have purchased AA and D flashlights and lanterns with LED's, and adjustable brightness levels ("high" for good light, "low" for long battery life).