The bottom edge of the sail can swing back and forth just like a sailboat. The result is that the angle of the sail is self adjusting and more energy is captured from the wind. Magnets can be attached to the black tube and coils placed around them to make a simple generator. If you are good at knots this is a fun thing to make for your back yard.
It only requires six 3/4" diameter PVC pipes that are 10' long. You attach those to a 4" diameter drain pipe using PVC "T" connectors. You need to get a bearing to support the whole thing and put that inside the black tube at the top. You then have a metal pipe supporting that with some kind of frame to hold it up as shown in the video. I used nylon cord with a bunch of bowline knots to make a box kite like structure with six sides. I got some white flags like you see in front of stores on the internet and made the sails from those. My wife helped me sew the seams. I put some grommets in the sails to have something to tie on the chords. It makes an interesting conversation piece.
Негізгі бет Small scale sail VAWT
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