Aerospace Technic and Technology

Development modifications of aircraft have become the main direction of development of transport category airplanes, including military transport (МTА). However, there are several ways to solve such tasks:

– to leave the same area and other geometric parameters of the wing and the problem are solved by significant changes in the power plant;

– change the wing area and the aerodynamic configuration with the same parameters of the power plant.

Both these ways have their advantages, but their implementation raises a number of problematic issues:

- excessive growth of the starting mass modification;

- the deterioration of its takeoff and landing characteristics;

- deterioration in fuel efficiency and other technical and economic indicators, which leads to a decrease in the competitiveness of the modification.

The most effective is getting the new aircraft when an agreement is called, changes are already in the preliminary design phase of the modification.

The article formed the scheme of approval of such changes, with the essential growth of the load capacity, range, and improved fuel efficiency of the designed modifications. A distinctive feature of the proposed scheme is that modification changes the geometry of the wing reduces the magnitude of its inductive reactance at a predetermined lifting force.

A model of the influence of design changes in the geometry of the wing, such as the narrowing and the corners of the geometric twist of the local chord along the span, expressed via the coefficients of the ellipticity of the trapezoidal wing, to change the polars of the wing and its aerodynamic quality.

Developed a step-by-step evaluation of the aerodynamic performance of the required values of the coefficients  and , the magnitude of which is stipulated by the conditions of approval modifications to the wing and thrust characteristics of the power plant. This is an area , in which a possible implementation of the required increase in capacity modifications.

The obtained results related to the modeling of changes in the geometry of the wing are an integral part of the scheme approval deep modifications in the wing and the power plant is required when creating modifications with enhanced performance.

modification of aircraft; models to accommodate the changes in geometry of the wing parameters of the power plant

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