Calculate aircraft or rocket static margin from center of gravity, neutral point, and reference chord/diameter.
Static margin
20.00 %
stable with the selected sign convention
CG to neutral point
0.27 m
positive when NP is aft of CG
Reference-length margin
0.20 Lref
also used as calibers for rockets
Positive static margin means the center of gravity sits ahead of the neutral point.
20.00% static margin
Stability state
Stable
CG is ahead of NP
Static margin
0.200 Lref
20.00% of reference length
Station spacing
0.27 m
neutral point minus center of gravity
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.
Calculate aircraft or rocket static margin from center of gravity, neutral point, and reference chord/diameter.
Static margin
20.00 %
stable with the selected sign convention
CG to neutral point
0.27 m
positive when NP is aft of CG
Reference-length margin
0.20 Lref
also used as calibers for rockets
Positive static margin means the center of gravity sits ahead of the neutral point.
20.00% static margin
Stability state
Stable
CG is ahead of NP
Static margin
0.200 Lref
20.00% of reference length
Station spacing
0.27 m
neutral point minus center of gravity
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.