Категория: Aeronautics

An addition to the question of calculations of complicated and majority systems failure-free

UDC 629.7/621.01 BBK 30в6

Furmanova E. A., Bojko O. G., Shajmardanov L. G.

The article proposes a methodological approach based upon the notion that at the stationary approach the probability of element failure in a workable part of the system may be defined by the total density of elements failure probability flows in the system’s part.

The purpose of the article is to compare the possibilities of traditional and proposed methods of calculating the majority and bridged systems failure-free.

The results obtained with proposed approach strictly match the systems failure conditions. The approach appropriateness is confirmed by the results of experimental research. The methods proposed in the article may be used in calculating the failure-free of the aircraft and spacecraft functional systems.

Key words: majority system, complicated system, failure probability, elements failure flow density, failure discreteness.

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The concept and the results of aerodynamic design of a wing-in-ground-effect (WIG) vehicle with a wide range of operating angles of attack

UDC 629.7.016 BBK 39.5

Vshivkov Y. F.Galushko E. A.Krivel’ S. M.

The article presents approaches to designing a WIG vehicle with specified maneuvering characteristics and a wide operating speed range for level flight. Providing the maneuverability mounts challenges to operational range of angles of attack and lift coefficients. The aerodynamic design of a WIG vehicle meeting the requirements is proposed.

Key words: a WIG vehicle; maneuverability; a lift coefficient; aerodynamic design.

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