So I have been thinking about making my own personal windmill for supplemental electricity generation and came up with a new little design. I think it should create more torque than a traditional windmill. The energy is transfered directly to the rotor instead of it beng directed traversely in another direction.
The little half circle thing is a guard so that the wind is only hitting half the blades. The fin in the back will make sure the thing is pointing into the wind instead of it hitting it sideways. The whole device will swivel around on a pole. See attached rudimentary image.
I should be able to make it mostly out of wood. I'd start out with a small device maybe using those wooden paint stirrers for the blades. Couple thin peices of wood for the shielding and a wooden fin on the back.