PRIORITY FORMULAS AND HINDSIGHT ANALYSIS IN VARIATIONAL TREATMENT AT THE STAGE OF CONCEPTUAL DESIGN OF TRANSPORT AIRCRAFT (UTILITY AIRCRAFT)

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The process of creating samples of any equipment, including aircraft, is a rather complex multi-stage process, which is aimed at solving a large number of various tasks in complexity. However, though the questions and tasks to be solved directly at the stage of design are well studied and clearly formalized, the stages of conceptual design where development decisions of prototype design are made have not been studied sufficiently. Of particular interest is the solution to the problem of assessment of actually achieved technical level of equipment models already implemented with the subsequent prediction of technical requirements for future and establishing the priority of their implementation directly in the design process. It is shown that such a solution is fundamentally possible, which allows to perform a coherent determination of indicators of technical characteristics of a prospective prototype in compliance with the priorities.The article develops the foundations of such an approach and demonstrates the possibility of its implementation based on an analysis of indicators and aircraft performance characteristics of a perspective transport aircraft (utility aircraft).In the framework of the research, a regular approach of the assessment of degree of innovation indicators of a perspective transport aircraft has been developed and hindsight for this class of aircraft on the basis of the integrated use of the transport system indicators and the integration of airframe and power system of the aircraft developed by the authors of the article have been formulated.. The high efficiency of the approach in solving particular research problems, such as: assessment of the innovation degree of a directly new model of a transport aircraft; determination of the directions of perspective design developments; coordination and prioritization of indicators and characteristics of the airframe and engine of the aircraft has been demonstrated.