Estimation before modelling as the method for identification of the aircraft aerodynamic characteristics in nonlinear flight regime

The paper presents a successful application of the Estimation Before Modelling (EBM) methodology, known also as the two-step method, to a broad spectrum of the identification problems of aircraft aerodynamic characteristics at high angles of attack and sideslip. The paper presents some of the basic concepts and briefly surveys principal features of the method. From the results presented in the paper it can be concluded that the EBM approach have reached such a level of maturity that it is an integral part of any aircraft development and assessment program.