#### Interstellar

##### Member

- Joined
- Feb 28, 2018

- Messages
- 12

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I've been designing a simple one stage rocket with OpenRocket, which allows the user to design and simulate their designs. I was always told that a general rule of thumb for a rockets stability is that the center of gravity should be 1-2 calibers above the center of pressure. With this rule applied to my model, in the simulation the rocket violently pitches in an oscillating motion, but when the stability margin is less than one but greater than zero the rocket is semi-stable (still has stability issues but they are reduced). Is this the result of a flaw in the simulation or... ?

model0.png - Contains design of rocket with stability margin of 0.193 cal

graph0.png - Graph containing simulated flight results with stability margin of 0.193 cal

model1.png - Contains design of rocket with stability margin of 1.55 cal

graph1.png - Graph containing simulated flight results with stability margin of 1.55 cal

model0.png - Contains design of rocket with stability margin of 0.193 cal

graph0.png - Graph containing simulated flight results with stability margin of 0.193 cal

model1.png - Contains design of rocket with stability margin of 1.55 cal

graph1.png - Graph containing simulated flight results with stability margin of 1.55 cal