RESEARCH:
^Core Burner
^End Burner:
A rocket with that has an end burner as a motor isn't typically used as often as a core burner. An end burner is a motor that when it is lit the motor will burn with a low amount of thrust. End burners have a small nozzle and a short core. End Burners aren't used as much because they usually have a lower thrust level. End burners have a long burn time, but there is a risk that you can burn through through the wall if the rocket motor isn't made nicely. When an end burner starts burning it burns straight up. The flame starts at the opening ignition and makes its way up to the forward bulkhead.
Core Burner:
A rocket with a core burner as it's motor is most commonly used. Core Burners have a hollow opening that goes up to the nozzle.The core burner also burns outwards equally then it proceeds to the rest. When the core burner is burning inside the hollow core it burns inside out from both ends. Core burners have a larger surface area when burned which affects its thrust when it is launched.
Black Powder:
Black powder motor fuels are used more often than any other type of fuel, because it has a fast burn rate. Black power rockets usually have a clay nozzle and an ejection charge. Black power has very few ingredients including Charcoal, Sulfur, and Potassium Nitrate.
Sugar Rocket:
Sugar motor fuels aren't used as often as black powder fuels. Sugar rocket fuel is made up of very few ingredients as well. It is made up of potassium nitrate and white sugar. The sugar in the rocket acts as the fuel, which is weird but pretty amazing.
MOTOR RESULTS:
Evan, Lydia, I used an end burner for out rocket motor. The results we got from the end burner motor were quite depressing, because we used an end burner our thrust rate wasn't high enough, while everyone else's motor seemed to have a higher thrust curve. Since we had an end burner there was a longer burn time than most of our other classmates. Our end burner motor had a very low thrust curve because it took more time to burn. If we put our motor into a rocket and laughed it our rocket would even go up due to out low thrust curve. Because we chose a 1/4 hole for our nozzle there was not enough pressure to make the motor "launch", so our motor was basically a smoke bomb. I think my group took a pretty big risk by doing an end burner, because no one else did and we mainly did it to see how it would turn out. To finish off the project we had to figure out our thrust curve and burnout time.
Thrust Curve & Burnout Time Data:
https://docs.google.com/spreadsheets/d/1JJX9vn57riIwUpnRX59UycqPlGIDrLUOeMv6P6u9e_I/edit#gid=0
THRUST CURVE RESULTS:
After we had "launched" or tested out end burner rocket motor we had to figure out what our thrust curve for our motor was. To figure out the thrust curve of the motor we had to get the clip of our motor and put it into an app that slows down the time, once the video was slowed down we had find out our thrust numbers and record them and put it into excel and eventually we mad a graph to represent our initial thrust curve.