PyPK is a collection of p-k methods for solving the flutter equation.
The original p-k method is described in [Rodden, Aerodynamic lag functions, divergence, and the British flutter method](https://doi.org/10.2514/3.44772) and its non-iterative version is described in [van Zyl, Aeroelastic Divergence and Aerodynamic Lag Roots](https://doi.org/10.2514/2.2806). The mode tracking algorithm is described in [van Zyl, Use of eigenvectors in the solution of the flutter equation](https://doi.org/10.2514/3.46380).
## Install and run
If you only want to use PyPK, you can install it using
