Abstract <p>The paper considers the advantages and prospects of widespread use of the air data system with the fixed flush-mounted receiver of the incoming flow on ultralight and small aircraft of various classes and purposes. A constructive scheme and models for determining the parameters of aircraft movement and environment in the instrumentation channels of the system with one fixed flush-mounted receiver and an integrated computer are presented, according to which a block diagram was developed and models of operator sensitivities were obtained that determine dynamic characteristics of the air data system under consideration. A technique was developed for obtaining models of the dynamic errors of the measuring channels of the considered air data system under deterministic and stationary random laws of change in the measured air parameters and external aerodynamic interference in the form of a random turbulent atmosphere. The developed technique is described using the example of a channel for measuring the true airspeed of an aircraft.</p>