For the life of me, I had not a clue how those curved DIY blades people made that looked too complicated. The secret is out now!
55 gallon plastic drum vertical axis wind turbine (vawt):
Take a 55-gallon plastic drum and sketch out the blade profile. Then using a simple saw-zaw with lots of fine teeth, cut it out.
Locally, there is a CraigsList person who sells these for a mere $8 each. I have 2 right now for garden watering. hmmm. I wasn't planning on making one so tall. The nice thing about the design, it's so compact and only needs 2 blades.
Why is this design better? Ever watch those figure skaters spin and pick up high velocity as they pull everything in. This keeps things from being pulled apart at higher wind speeds. The shape also acts as a wind break to prevent the gyration from exceeding the upper limits of the design.
The science behind all this is fun. I'm not all that keen on the nit-picky calculations as the math typically can go over the average person's head. haha. Solar is nearly plug and play as the controllers and battery banks can be figured out with average math to a little algebra. Wind is on a calculus level with a twist of trigonometry. (pun intended too.
).
So, if I style the outline on a 55-gallon plastic barrel, like that in various images for the motor ranges I have, I'll be in the same in-field of the ballpark vs. being in the bleachers out-of-bounds.
I have about 2-months left of good weather to push this project. The first frost will hit thereafter with the winds already at a constant good clip out here in the mid-west.