It is nevertheless very difficult to access such data among existing sailplanes.
Here is a simple spreadsheet tool that evaluate inertia of a wing on main axes (Ixx, Izz, Iyy) .
Some simplifying hypothesis are made (wing seen as a beam, simplified mass distribution, etc), in order to be able to evaluate realistic values of inertia.
- estimation of the spar & "skin" mass
- geometry elements
- water quantity
- Inertia/ inertia radius, at elements CG
- Inertia/ inertia radius, at wing CG
- Inertia/ inertia radius, at a reference point
If you happen to have data on sailplane inertia, just tell me !