Impressive work Bob.
i am working on a new style of wind turbine, i always think outside of the box, so be kind,
i think this one will be more effecient than the vawt and it will be 60% effecient as hawt. I Call It The "FAWT" Silo. "fixed axis wind turbine Silo" it will hide the prop from passers by. check it out at my site.
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best regards
Sam