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See link. This only powered by wind, blades on the top spin the
outside piece, blades curved to spin the opposite direction spin
the
inside piece.
I'm sure this has been done but just in case.
This only powerd by wind.
https://www.pintere...381187555947061776/
In metal so it's weatherproof obviously. [doctorremulac3, Jun 05 2022]
[link]
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