|Аннотацiя:||The features of design of flight tests for research of critical flight modes in case of failure and damage of lifting and control aircraft units with the help of free-flying dynamically similar models are analyzed; recommendations to reduce the time and costs of such tests are developed. The performed analysis clearly demonstrated the methodological advantages of conducting experiments in the free flight of the unmanned model. The absence of the risk of crew loss and the ability to perform a relatively more strong model at the design stage allows us to determine the subcritical and overcritical values of the investigated parameters in the first test launches. In general, the convergence of the process of searching for critical values of the parameter with the required accuracy is significantly increased.
Keywords: system analysis, critical modes of flight, aircraft structural damage, flight research.