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The paper is focused on the development of a thermodynamic mathematical model describing the internal ballistic phenomena, taking place within working chambers of an airgun. The objective is to derive a governing equation modeling the change of gas temperature in a control volume subsuming several incoming and outgoing mass airflow rates. A novel algorithm for solving internal ballistics of all types...
The article analyzes the relationship between frangibility of frangible bullet and its impact velocity. Based on the results of extensive shooting experiment, the analytical functional dependence of frangibility coefficient on impact velocity of the bullet on standard hard target — plate Hardox 450 of thickness 10 mm is determined. The effect of the difference between the mass of the captured fragments...
The paper studies the problem of the interaction between leading parts of a projectile — discarding sabot segments of the type projectiles 3BM-15, PpSv-97, TAPNA, POLKA (all of APFSDS design) — and the inner surface of the barrel bore to find out the reason of the atypical barrel bore wear profile developing by the turning of the discarding sabot segments. It also introduces comparison and assessment...
Temperature difïerence between target and background has critical role of thermal imaging system in surveillance applications. It is the difference in target and background temperature that causes the visual contrast. To assess it, measurement of thermal image and thermal simulation program have been used. This paper presents the experimental measurement of thermal difference, the basic of thermal...
The Fire Control Systems fulfil the main role in the development of modern weapon systems. Nowadays it can be seen the intensive progress of exclusive parts, altered features and operating principles connecting with modern FCS. The paper deals with the marginal problem associated with the unique method of target acquisition system. Moreover, the characterization of the FCS from the perspective of...
The article presents new methodology of an autoloader functional diagram determination for a fixed cartridge using electric drivers. The time courses of the cartridge conveyor displacement, feeding device driven levers and ramming device driven shaft revolutions are analyzed as the main parts of the autoloader. The torque of the cartridge conveyor is measured by a strain gauge and the signal is transferred...
Experiments with a simple plane wave generator consisting of two cylindrical explosive charges and a metal ring are presented in this work. Detonation front curvature emerging from the second charge is measured using high-speed camera and Optimex fiber based device. The results are compared with LS-DYNA simulations.
The paper describes new approach to finding characteristics of 73 mm rammed cartridge in the BMP-1 IFV (infantry fighting vehicle), 125 mm rammed projectiles in T-72 MBT (main battle tank), and the ramming devices used in both weapon systems during rounds inserting into the barrel. The results are displacements, derived velocities and accelerations of cartridges and projectiles. Armature current and...
Focus of this thesis is to describe the problem of influence of the weapons tilt on the accuracy of fire. The tilt can be characterized as systematic or random error. In this thesis there is described the case of random error introduced by the tilt of the weapon and the scope when aiming the rifle at the target.
The paper deals with analysis of shooter — weapon system oscillation when firing from a biomechanical point of view. The biomechanical model of shooter arms is developed by taking the muscles and tendons forces into consideration. Linking between shooter and the weapon is treated as elastic and viscose damping. The dynamic model developed for a gas operated submachine gun by applying Lagrange equation...
The article summarizes the results of a shooting experiment aimed at comparing the effects of two types of hollow point handgun bullets — Action 5 and the newly developed AM-D, both of calibre of 9 mm Luger. The firing tests were carried out against an etalon fuselage target representing the airframe fuselage structure of a transport airplane. The firing was performed both directly at the etalon target...
The paper describes the new possibilities of Home LASER Shooting Simulator (HomeLESS) project and its usage for measurement of shooting skills. The first part of this project was presented at ICMT 2013 [1]. The objective of this project is provide a cross-platform free and open source LASER shooting simulator, measuring tools and accessories available to the shooters and people interested in shooting...
Nowadays, shooting weapons are widely used and highly demanded not only by the state armed forces but also for other civilians who are buying firearms for sport purposes or their own protection. These include category D shooting weapons which can be owned, held, carried and used without a gun license in the Czech Republic by people older than 18 years. Even these shooting weapons are able to cause...
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