Reasoning

      We used the simulator to find the best fins and nose cone.  We also realized that 3 fins would work the best for our rocket.  We added the two pieces of duck-tape to help secure our pressure chamber.  We only used two pieces of tape because we want the rocket to be as light as possible.  We are putting the parachute inside the cone so the center of mass will be higher up and in a better place.  We used an elliptical cone because our results from the simulator showed that it was the best to use.  On the internet, we learned that rockets going at sub-sonic speeds should have a rounded tip.  This is why we put a marble at the tip of our nose cone.  We made the cone out of a circular piece of cardboard because we thought that it would be most efficient, making it aerodynamic and light.  Our simulator results showed that it is very important that the nose cone is light.  We chose the Smart Water bottle, because it is smooth, long and thin, making it aerodynamic.