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I know this is apples to oranges comparison, but it's the best I can do for now.
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This isn't rocket science, just parts I pick up at the recyclers. I have an 18" diameter squirrel-cage fan with bronze bushings. At the bottom of a standpipe, it might be fit for purpose.
I could extend the downpipe and prop-shaft up to 6-8ft, I'm not sure the extra length would help or not. The skin friction might act against the rotation of the water column.
[can't find an aerodynamic oddity pic, posting anyway]