Hand Crank Fan
thingiverse
Not convinced yet, so I'll wait until I get the test results before making any changes.
Download Model from thingiverse
With this file you will be able to print Hand Crank Fan with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Hand Crank Fan.