Yes, its a mouthful – Multibody Dynamic Simulation. It simply means that you add gravity and air properties to your Blender environment, add physical and aerodynamic properties to your collection of Blender Objects, and then watch how it all behaves by simulating physics, mechanics, kinematics, aerodynamics, aeroelastics, etc. Some really smart researchers in Milan, Italy have been working on the open source code for over a decade, and now their code which is called MBDyn is hooked into Blender. The Python script and a video tutorial are available. Even if multibody dynamics is not your thing, the approach to adding attributes to Blender objects using context sensitive menus may be useful for your next Python script. You can download the source from here, and/or view the 17.5 minute tutorial on the lower part of the home page at this website. The MBDyn code was developed at Politecnico de Milano, and is available here.