For my scratch rocket i started with determining the size I wanted to make my rocket by using a pvc pipe with the diameter that I wanted. I cut out strips of thick paper which I then wrapped around the pvc pipe. I used glue and tape to wrap the paper around the pvc pipe. I wrapped four layers of thick paper around the pvc pipe for it to be sturdy and also to get the correct weight. I added mod podge to give extra strength on the body. I then used a plastic cap as a nose cone. I then cut two of the edges of the plastic cap then attached a rubber band from the nose cone to the rocket. Then I cut out my fins from a piece of cardboard and wrapped them with tape to cover the holes that the cardboard has on the edges. Then I used a fin agliner so the fins will be aligned perfectly when I glue them on the body of the rocket. After that I attached the parachute by attaching two more rubber bands inside the rocket and the other two ends of the rubber bands to the parachute. Then I inserted a motor mount inside the rocket so it will hold the motor in place. I was unable to launch the rockets but from what i know one rocket would fly better than the other rocket. I think one of the rockets I built with for fins will fly better than the other rocket because it has four fins that are shaped like an L and it will be more aerodynamic. The way that the motor works is by having two components in it that will allow it to burn for a while. one of the components is the igniter that will ignite the oxidizer in the motor, the oxidizer is the component that will burn for along time which is the thrust that the motor has. One of the questions that came up was will my rocket work with this type of fin design. I asked this to myself because I wasn't sure if it would work because of the opening I left on the fin. I think i did good on this project because I was focused on finishing my rocket I would set goals for myself everyday so I can get my rockets done on time. | |