If nose fins are messing up your CG/CP relationship and requiring too much noseweight, you could always make them PIVOTING fins, which if done right have NO adverse affects on the CG/CP relationship and can minimize the amount of nose weight required.

Basically, only the area of the fin ahead of the pivot has to be accounted for in the stability calculations... IOW, if the pivot point is at the 1/4 chord line, only the part of the fins IN FRONT of the pivot "axle" point contributes to instability... for Rocksim/Open Rocket simulations, you basically add "fixed" fins the size and shape of the area of the fin AHEAD of the fin pivot point in the simulation, to determine what the aerodynamic effects on the CG/CP relationship are and thus amount of noseweight required...


Later! OL J R : )

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