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center of gravity

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  1. itb7

    OpenRocket center of Mass

    Hello everybody, I'm pretty new here, and looking for some advice on using OpenRocket to run a sim of a custom motor. I'm not certain how OpenRocket is supposed to do this, but I'd like to control the center of gravity for the motor, which will change for the first couple seconds of flight as...
  2. Brian-Tampa

    MAC Black Fly

    Hello, I was thinking of purchasing a 4" Black Fly kit from MAC Performance. Their site does not have the correct RockSim file for this rocket in the 4" version. (.rkt file format) They do have the file for the 3" version which I downloaded and loaded into RockSim. The file is showing .33 margin...
  3. Interstellar

    Tips and Guidelines for Aerodynamic Stability?

    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...
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