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.
I made the blades out of PVC pipe and bolted them with 1/4 bolts with a doubler made out of pvc scraps. I weighed all the blades then mounted them and spun the hub and checked for balance and sanded a little off the tip of the heavy blade.
This is the frame looking toward where the tail will be. I added a solar yard light to see the blades spin at night. The washer welded above the pivot pipe is where the wire stop sits and the wire goes thru the pipe. The pivot is an old base off a tent carport with a 1 inch pipe welded into it, it fits nice into a 1 1/4inch pipe i used for my tower.
The pivot pipe fits inside a 1 1/4 pipe for the tower. I put some wheel bearing grease in it to let it swing easy.