Tiniakov D. Method of Determination of the Lift System Geometrical Parameters of the Transport Category Airplanes Based on Criteria Effectiveness

The object is designing of the lift system of transport category airplanes. The purpose is to develop a determination method at the preliminary design stage of the lift system geometrical parameters of the airplanes with the minimal induced drag. The methods of investigation are analysis and integrated design methods, selection and estimation models of the geometrical shapes of the airplane lift system. The result - the dependences with which it is possible to determine the following at the stages of preliminary design or during development of modifications of the transport category airplanes obtained: the geometrical parameters of the lift systems; the interdependence of shapes and location of the wing and tail; the values of geometrical twist angles of local chords from the point of providing the elliptic terms of the circulation distribution along wing span. Novelty: the firstly developed the determination method the top view geometrical parameters of the transport category airplane's lift system by the dimensionless partial criteria of aerodynamic efficiency; improved of dimensionless criteria for determination of areas and layout parameters of tail units in the lift system with a view to minimization of losses to balance the aircraft; models that establish the interdependence of the partial criteria of aerodynamic efficiency of the lift system with the integral indexes of the competitiveness of the aircraft have been developed further. Industry - aviation and rocket science.