The left image is the final prototype of our design. We used 3 fins, each seperated 120 degrees away from each other to ensure symmetry. The water bottle was stomped on to force the air into the rocket, pushing it up. In our testing phase, the rocket nose blew off of the rocket because it was not securely attached, and all of the pressure caused it to fall off. In the final test, Rohan stomped on the water bottle, and the rocket flew very high, and it ended up landing in one of the trees.Â