Stability Tips

• Use a program like SpaceCAD, RockSim or VCP to calculate where your CP is located.

• It is also possible to do swing tests.

• Remember installing a heavier motor moves the CG aft and can make a stable rocket become unstable

• To make a rocket more stable

  • Move the CP aft by
    • Moving the fins aft
    • Making the fins larger (if they are aft fins)
  • Or move the CG forward by
    • Adding nose weight
    • Making the body tube longer

• Overstable is OK but rocket will tend to weathercock into the wind