Rotor
thingiverse
You can easily modify the number of blades and rotor diameter directly within the f3d file. Simply use a pencil as a makeshift handle, then spin it rapidly to create some serious airspeed - your rotor will take flight in no time.
Download Model from thingiverse
With this file you will be able to print Rotor 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 Rotor.