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Ben, we think a lot alike. I have been designing a vertical wind turbine based on a patent from the 70s (public domain). I have been testing different blade and deflector shapes in my home-made wind tunnel. My building that my business is in has a large flat roof, and every time I got up there to fix a leak or work on an exhaust fan, it was windy. I thought it would be great to put up a wind turbine to charge the batteries in my electric Fiero. I just needed a way to store all that energy. I didn't like the idea using a big bank of batteries, so I thought why not compressed air. Big propane tanks are relatively cheap and easily hold 300psi, as the burst pressure is 925psi.
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