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Old 03-30-2022, 10:49 AM   #3 (permalink)
freebeard
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That's reasonable. I saw the potential expense, and assume $1-2ea used from an electronics recycler. One of my concerns is that PC fans aren't waterproof enough for outdoor use.

As for the blade design, maybe follow www.youtube.com/c/MajorHardware for a 3D printable design.

The main point for me was a design that works in the wind shadows near the ground. Here's another video by Murray-Smith that addresses the same issue:

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