USB fan prop

thingiverse

This is the best design I could come up with for those small usb-powered fans. It has 2x the required amount of mounting holes for the hubs pins, making it easy to install. I haven't run any flow modeling on this, I just sketched it up in shapr3d. It pushes more than enough air for my desk. I have no idea how to balance it to make the vibrations go away lol. Put it on some dampening mat.