The calculations for the center of pressure for the model rocket are shown above.
The center of gravity was determined by balancing the rocket on our finger.
We wanted to get the center of pressure behind the center of gravity, so the rocket would be stable, but we were not able to do this, even when we added weight to the front of the rocket and decreased the area of the nose.
Our rocket/glider didn't go anywhere because, when the tether was pulled, it just exploded shooting water and the fins off. If we had more time we would go back and see calculations to see what went wrong.