I wanted to land a model rocket. The easiest way to do this would be to place the center of mass underneath the center of thrust. After I tried constructing and testing a version of the rocket made from my violin stand and 3 rocket motors arranged at the top of the rocket. Ideally, they would ignite at the same time and pull the rocket up. But when I couldn't get the engines to ignite all at the same time, I needed to switch the design to a rocket with only one engine and 3 landing legs. For both projects, I made a simulator in Python that took the thrust of the engines as they changed over time and showed when they would land. When I launched the second version of the rocket, the one with a single engine and 3 legs, it flew and flipped over and crashed. I believed the rocket would land correctly because the center of mass was below the center of weight. In the future will need to increase the distance between the two. One way to do this would be to put a more powerful motor. Below is me launching the rocket with one motor at my friends house.

That's me with the welding helmet. The engine I used had an ejection charge in it and I wanted to make sure it didnt hurt me.