Make It Float and Catch The Wind Challenge The design is based on a catamaran. the clamps to the bottles have a sword to keep the boat on course. This solution also ensures that the clamp around the bottle is flexible. The nuts and bolts that are used can also be printed and there are enough on thingiverse. By using bottles you immediately make use of the air inside of the bottle to increase the buoyancy. The sail element is based on a kite. The sail harvest the wind in order to make a move forward. The rotatability about one ax ensures that the wind can be used from all directions. Kite is made of special kite fabric but you can also use a piece of plastic. Your free to make your own form and shape just test whats the best for your boat.