Hovercraft
thingiverse
This is a drawing for a discussion of another part, you can completely ignore it unless you want to to try and build a highspeed indoor hovercraft from a foam block. Check out http://www.thingiverse.com/thing:1328403 for more details.
Download Model from thingiverse
With this file you will be able to print Hovercraft 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 Hovercraft.