This is a wind generator that I built with 2 Ametek 30 Motors. It is still in the experimental stage, with 3 blades on 1 and 4 0n the other. The 4 blade prop has a saw blade for a hub (Not recomended) . I will be using the 4 blade setup on the ones I am building now, along with an aluminum hub. I am working on a new set of blades now.
I started with two amtek 30 motors, inside 4 inch pvc. Held on by 2 ss hose clamps. I will put on 1 more later. I made the hub out of 3/16 aluminum and a 5/8 motor arbor from Amazon.com I replaced the screws with allen head set screws and got heavy duty half inch washers. To hold the wire in the tube I drilled a slightly smaller hole in a piece of real hard wood and 2 holes for 1/4 bolts then cut it in half. I also cut some doubler plates out of pvc for the blades. I used heavy duty extension cord inside the pipe tower.