This paper focuses on some aspects of development and modernization of contemporary multirole combat aircraft. In compliance with a large number of innovations developed in every generation of multirole combat aircraft as well as comprehensive modernization of existing types, the main essential and interactive aspects are emphasized here.
The paper presents one of the author's research results in the field of the preliminary aerodynamic optimization process. The optimal shape of commanding surfaces is obtained and described within the preliminary rocket aerodynamic estimation. Special attention is paid to defining the target function in a new manner, such that every deviation from the target function maximum value clearly and obviously points out which of target values is not attained and to what extent, i.e. that the chosen rocket shape does not completely provide for all previously set goals.
This article shows the effect of the "Cross eye" jamming method on successful guidance of monopulse homing missiles. The analysis of the results has shown that the maximal tracking error is made if the jamming signals are coherent and out of phase, that a larger distance between jamming antennas causes a greater error, and that, opposite to expectations, a smaller distance between the jammer and the missile results in better jamming effects.
The paper analyzes an underwater projectile. The input and output values, the projectile speed and acceleration are defined for a quality definition of the projectile mathematical model. With the conditions of the projectile potential movement previously set out, the torpedo model is defined by six equations.
Identification of the condition of a cooling system without disturbing its function, when failures primarily occur due to changes in physic- chemical characteristics of engine cooling agents, has considerable technical and economical effects. Since change in functionality of complex cooling systems is most often a consequence of changes in the characteristics of cooling agents, the change of physic-chemical characteristics of coolants can be accepted as a parameter for evaluating cooling system conditions. There is nowadays a wide range of sophisticated measuring equipment for evaluation and analysis of physic-chemical characteristics of coolants.
The traditional procedure of calculating the torsional vibrations in the ship diesel engine propulsion system is shown in this work. A real system is replaced with an equivalent 19-degree of freedom system and its free and forced torsional vibrations as well as appropriate torsional vibration strains have been analyzed.
The paper describes the application of one of the operational research methods in solving the problem of ammunition supply in an anti- tank company. The method of transportation problem is applied in order to find the most cost-effective plan for ammunition transportation from the storage site to the area of anti-tank company deployment.
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