Dynamika lotu zasobnika lotniczego z połączonym przegubowo hamulcem aerodynamicznym, zrzuconego z samolotu

The object has been treated as an invariable material system with a movable (deflected) airbrake. The equations of motion have been derived in terms of quasi co-ordinates, using the Boltzmann-Hamel equations for the material systems with holonomic constraints in the system of co-ordinates related to the pack.