Newton's Third Law of Motion
For every action there is an equal but opposite reaction.
How does this correlates with rockets?
Well when a rocket engine is ignited it releases out hot gases at the bottom of the engine mount. In the reaction of forces, the engine mount is pushed forward in a thrusting motion.
For every action there is an equal but opposite reaction.
How does this correlates with rockets?
Well when a rocket engine is ignited it releases out hot gases at the bottom of the engine mount. In the reaction of forces, the engine mount is pushed forward in a thrusting motion.
Identifying Rockets
For our rocket we used two D engines. The first engine was a D12-0 and the second was a D12-5 (engines on left are D12-0 and engines on right are D12-5). The types of engines are described using one letter and two numbers. In the first engine the D stood for the amount of impulse, the 12 stood for the amount of force, and the 0 stood for the ejection delay. The second engine had a five second ejection delay meaning that the engine would ignite then after five seconds an ejection charge was released to separate the nosecone from the body tube to release the recovery device.
Impulse curve and Identifying engines
The highest point on the graph is the maximum force that the engine is exerting. It then drops off and plateaus which is called the burn off.
When the curve drops to the x-axis it is called the delay time.
Lastly, when the curve drops below the axis it is called the ejection charge.
When the curve drops to the x-axis it is called the delay time.
Lastly, when the curve drops below the axis it is called the ejection charge.
We can use this chart to find the types of engines that are used in each graph.
This is a C6-7 engine curve.
This is a E9-6 engine curve.
This is a C11-6 engine curve.
Eggscaliber
Caroline's Eggscaliber rocket will not have a normal flight pattern. The most likely outcome will be that when the rocket launches the flight pattern will look normal but rapidly change when the ejection charge is released before the rocket can approach it's potential height. This would cause an abrupt stop and could potentially damage the rocket. Her rocket could not have enough force from the ejection charge to eject the nosecone. That would cause a malfunction with the recovery device and cause the rocket to fall and break on the ground. She should have used a D12-3 or a D12-5 engine as this would allow for a longer delay time.
The Big Betty
The Big Bertha's recommended engines are B4-2, B4-4, B6-2, B6-4, and C6-5.
If we used the B4-2 engines the rocket would not attain an altitude as high as ours went and the recovery device would have came out sooner. If we used a C6-4 it would have went higher than the B4 but not as high is the D12 we used and the recovery device would have came out 2 seconds after the B4 but 1 second earlier than the D12-5 engine.
We used the D12-0 and D12-5 engine because we wanted our rocket to go very high and the 5 second delay released the recovery device when the rocket was at the top of its flight.
If we used the B4-2 engines the rocket would not attain an altitude as high as ours went and the recovery device would have came out sooner. If we used a C6-4 it would have went higher than the B4 but not as high is the D12 we used and the recovery device would have came out 2 seconds after the B4 but 1 second earlier than the D12-5 engine.
We used the D12-0 and D12-5 engine because we wanted our rocket to go very high and the 5 second delay released the recovery device when the rocket was at the top of its flight.