I saw that picture and thought it was a test size model, not the real thing. It's conventional. There are lots of "how I built a small vertical wind turbine fr

I saw that picture and thought it was a test size model, not the real thing. It's conventional. There are lots of "how I built a small vertical wind turbine from scrap parts" articles and videos.[1][2] This is easy to do and worth it for off-grid locations. Most people just cut blades out of some cylinder such as a metal or plastic barrel. The Birmingham people just optimized the blades a bit. Note the lack of a direct comparison with a simple blade form vertical wind turbine. Nothing wrong with doing this, but the hype is excessive. [1] https://www.youtube.com/watch?v=G-WkJI5TtmQ https://www.youtube.com/watch?v=G-WkJI5TtmQ [2] https://www.youtube.com/watch?v=ti9FkEg8G_Y https://www.youtube.com/watch?v=ti9FkEg8G_Y