Engine Analysis
Newton's Third law of Motion deals with rockets because the gasses push on the engine, and the engine pushes on the gasses creating the diagram shown above.
Identifying Engine Specifications
![Picture](/uploads/8/6/7/7/8677251/1194016.png)
This is a D12-5 model rocket engine. The D in on this rocket stands for the amount of impulse. The 12 is for the average amount of force the engine puts out, measured in Newtons. The last number stands for the time between the engine burns out and the discharge is fired off. In other words it is a time delay in seconds.
Thrust Curve
which engine is It?
![Picture](/uploads/8/6/7/7/8677251/9684883.png)
This is an impulse curve for a C6-7 engine.
![Picture](/uploads/8/6/7/7/8677251/2326737.png)
This is an impulse curve for a E9-6 engine.
![Picture](/uploads/8/6/7/7/8677251/6448574.png)
This is an impulse curve for a C11-6 engine.
Eggscaliper
If she uses this engine the parachute will come out while the rocket is shooting up in the air because the she used a D12-0 and the zero means that there is no time delay between engine shut off and ejection charge. This will make the parachute break off of the rocket because the plastic will not be able to withstand the force of the ejection charge and the wind around the rocket while it is moving at a very fast rate yet. A good engine for her to use would be a D12-5 or D12-7 instead of the D12-0.
Choosing Our Engines
For our rocket we chose a D12-0 for the first stage of the rocket so that there is no time between the engine shut off of the first stage to ignite the second stage. Then in the second stage of our rocket we used a D12-5. This allows the rocket a good amount of time to slow down before the streamer was ejected out of it, and it also gives time for people to pick up the rocket in the sky because the engine smokes between the shut off of the engine and the ejection charge for that reason.