This is my entry into two thingiverse challenges, the Make It Float challenge, and the Catch The Wind challenge.
This is a simple sailboat, except that I'm going to use a rigid wing sail instead of a fabric one, so that I can 3d-print the sail as well as the hull, keel and ballast container.
The sail and keel both use a naca airfoil shape, data for which is downloaded from the UIUC airfoil database.
You can find it on Thingiverse.