Stability Calculator (Rocket)
Calculate your rocket's static stability margin using the Barrowman equations. Determines CP and CG separation in calibers for safe flight.
Inputs
Results
Stability margin (calibers)
4.02
CP from nose (mm)396.7
CP - CG distance (mm)116.7
Fin CN-alpha22.32
CG position (% of length)58.3
CP position (% of length)82.6
Lm70
How to Use This Calculator
- Enter Body diameter (mm), Nose cone length (mm), and Body tube length (mm).
- Set CG from nose tip (mm), Number of fins, and Fin root chord (mm).
- Adjust Fin tip chord (mm), Fin semi-span (mm) as needed.
- Review the Stability margin (calibers) result.
- Use CP from nose (mm) and CP - CG distance (mm) to inform your decision.
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