SINOPSIS

Some aspects of the calculations of the longitudinal force and moment acting on a passenger airplane at high angles of attack are considered. A simplified mathematical model describing the hysteresis of aerodynamic characteristics and buffeting at high angles of attack has been developed. The model is based on the data of aerodynamic characteristics identification by the results of regional and medium-range aircraft flight tests at M = 0.3−0.8.
The model is suitable for simulation of the aircraft dynamics at high angles of attack and allows using nonsteady dependences of lift force and pitch moment during real-time calculations in flight simulators.