center of gravity

[Mark Jeffords]

I am looking for opinions on center of gravity, forward of center of pressure. From what I have learned so far is that the C.G. should be the airframe diameter, ahead of the C.P. at a minimum. My question is, what would be considered to far forward if I wanted to add just a bit more weight forward to help with the stability ? Thanks for the help !

[AdrianParticipant]

I am looking for opinions on center of gravity, forward of center of pressure. From what I have learned so far is that the C.G. should be the airframe diameter, ahead of the C.P. at a minimum. My question is, what would be considered to far forward if I wanted to add just a bit more weight forward to help with the stability ? Thanks for the help !

Adding more stability margin really doesn’t hurt, even for 4 or 6 diameters or more. I have learned to use at least 10% of the rocket length as my minimum stability threshold, and I find that works better for long, skinny rockts and short, fat rockets. A very stable rocket will turn more quickly into the wind (weathercock) but that’s no big deal. Just use a higher-thrust motor if it’s windy.

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