27 Apr. 1993|
Plywood windmill blades,barn door plans,wood burning sauna floor plans - PDF Review
Step 2: Making the bladesBlades and a hub to connect them to were the next order of business. The blades rotate to face the wind and the propeller blades have an airfoil shape, which generates lift. Instead of getting maximal energy extraction, generation would halt because no wind would be passing through the blades and rotation would stop.
Roofs in North America are usually made from 2x4 wooden studs and thin plywood - this are totally unsuitable for mounting a wind turbine. I found that other people were making blades by cutting sections out of PVC pipe and shaping them into airfoils. A lamination process is used during blade manufacture (possibly strengthening the finished blade propellers and tabs).
I don't know if it's really much of an improvement, but it didn't seem to hurt, and the blades look really good (if I do say so myself).