This research was done by Annika, Isabel, and Sammie Motors:
______________________________________________________________________________ Powders:
http://www.skylighter.com/fireworks/how-to-make/End-Burner-Rockets.asp http://www.jacobsrocketry.com/aer/propellant.htm http://what-when-how.com/rocket-motor/end-burners-rocket-motor-2/ Creating our rocket design:My group and I decided to design a End motor with black powder, because we originally wanted to do a core motor with black powder, but he said that that particular type of motor explodes much easier and is more likely not to work so we decided to change it to an end motor. These are our designs for our motor. Illustrated by Annika!!! Rocket Motor Images:Looking Back: The end result of our motor turned out to work fairly well, but not as well as I would have liked. At the end of the project while we were graphing( the graph shown above ) it showed an interesting shaped. I noticed that in the middle of the burning process the thrust was really inconsistent which was expected due to the time decrease, but I thought the thrust would have decreased a lot faster than it did. The motor gave off quite a bit of smoke and even showed fire at the end. Looking Beyond: When we launched our rocket it did not go off the first time, we came to find out that this had to do with the nozzle not being deep enough. We also originally wanted to do an core burner with sugar, but we did some research and talked to some other people and found out that this type of motor was most likely to explode. This happens because the core burner builds pressure and if the nozzle isn't big enough the pressure can not escape and causes it to explode. Looking Inwards: I thought it was really cool how when we got our rocket to work it created a lot of smoke and you can see the fire coming out the bottom. The trust did not go as much as i thought it would have though. I think in the future my group is going to change to a motor that has higher thrust and is more consistent throughout the process. Looking Outward: I worked with Annika and Isabel, I liked working with this group, because they stayed focused and we got the work down when we were supposed to. We all worked well together. I think I could have participated a little more, but I had a hard time understanding what we were supposed to be going. I helped with the research and making the deadlines, but Annika did the design and Isabel created the graphs. Looking Forward: If I were to do this project again I would try to reach out to people who knew what they were doing really well so I could start to understand for myself what I am supposed to do and not rely on my group to explain to me and walk me through it even know it helped a lot. Takeaways: I should be more aware of good resources that can help me understand deeper about how everything fits together. Sometimes I feel like I don't know how to do it and don't take leadership over the project I don't get as good of an understanding. I can resolve this by reaching out to people and not just sitting back and doing what I am supposed Video Link https://drive.google.com/a/hightechhigh.org/folderview?id=0B64dDTcEVrmsa1NpVkdaR2hPMlU&usp=sharing&tid=0B28U7WgPlxBHUldvNmRCdGhuSTg Big T and Little t Average Trust (T) / Burn Time (t) 2.020380645 / 6.2 Link to spreadsheet: https://docs.google.com/spreadsheets/d/1JJX9vn57riIwUpnRX59UycqPlGIDrLUOeMv6P6u9e_I/edit#gid=0 End Motor: For the final stage of our project we would like to use Autrina, Elyse, and Isabell's motor. We decided on this motor, because they had a much higher thrust which potentially would make the rocket shoot much higher than ours. The time is also a lot faster meaning that it shoots up high really quickly. Fuel: Black powder Nozzle: 1/4 Full Core: 3/16 Peak Thrust: 2,968
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