Wind speed monitor (anemometer) modified with 90 degree mount for attachment to a vertical surface.

use M4 screw - 3x use 608 -> 8227mm Ball Bearing - 2x

I printed the 90 degree mount in Colorfabb nGen and the rest of the parts in PLA and it has held up in very hot and cold weather in Maryland while still spinning easily in the wind.

Modified from Anemometer - wind signaling 2x ballbearing by BHMarten at https://www.thingiverse.com/thing:4975134 under CC BY-NC-SA 4.0.