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The $50 Water Turbine -Build Tutorial v1.0
(www.youtube.com)
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this post was submitted on 08 Oct 2023
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in the end summary he talks about adding a vectorizer to start the flow swirling in the pipe before it hits the blades.. that's a great idea, and it seems like there would be other efficiencies like that to be gained before and after that fan element.. also i think i would want to try a fan design that resembled the prop on a boat motor.. seems like those would already have the best water displacement efficiency worked out..
For a given rpm and loading