Cg Calc Determines the center of gravity and lift off weight of your rocket.
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Cg Calc Description

This software program will tell you where your rocket's center of gravity is before you build it. All you have to do is estimate or measure the weight of the components you will be using in your rocket. You input their location on your rocket and CG-Calc tells you where the center of gravity is referenced to the nosecone tip, where most center of pressure programs reference the center of pressure. You look at the calculated center of pressure and center of gravity and determine if your rocket is stable before you build it. As an added bonus, CG-Calc will also tell you the lift off weight of your rocket. You will need to know that in designing your rocket motor so you will have enough power off the pad.

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