After we designed, built and launched rockets #1 and #2, We had to take all the information that we had gathered about what worked well, and what didn’t work well. Designing the 3rd rocket was easier than designing the 2nd because since we already changed one thing of our rocket, it was easier to figure out what we were going to change on our 3rd one because there were less options. Now I’ll tell you all about the process of designing and building rocket #3.
For rocket #3, my team decided to change the fins into bigger fins. This is because we had already changed the body of our rocket to a thicker tube, and we think that it didn’t really make a difference between the thin or thick tube. But, our second choice would be to change the fins, so we are keeping the body and nose cone the same and changing the fins. Our team decided more easily about what to change, and we made the decision quickly. We agreed the whole time, so we didn’t fight.
I think that our design for our 3rd rocket is a good one. I always wanted to make the fins bigger so I’m happy that we are making them bigger. We are also putting them a little higher up on the rocket because the group’s rocket that went the highest on the first launch, did that. So we have bigger fins so the air deflects off them more, a thick body for more air flow, and a tall nose cone so that it cuts through the air. I think it is our best design yet. My team collaborated well during this stage and we didn’t argue with each other.
Finally, it was time to build our rocket. It was a little easier to agree on things than it was when we built the first and second rocket, because one of the members of our team, wasn’t there. We glued the fins on (and this time we didn’t wrap it in tinfoil because when we did that before, it didn’t do anything). We also glued the nose cone on, and then we wrapped tape around it too just to be safe. Our rocket looks good, it’s colors are green, yellow, and blue. I think it will do well because of the bigger fins. We’ll just have to wait and see.
Then, we launched our rocket. For this launch, I was the countdown master. It was really fun because you get to countdown the rocket launch. I was also a clinometer reader. This was really easy because I had already done it two times before. It was really fun launch just like the other two launches, but this time our parents watched. Everyone’s rocket did very well, and went high. We found out later when we graphed the averages of how high our rocket went, that it went 114 feet high. This is disappointing because it was the lowest of all our launches, and it was the last one. But we were okay even though it was the lowest in the class.