Martin Macko

Inserting cartridges using electrically powered ramming devices

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 source voltage enable to estimate the required power for the ramming device. The results will use for validation of dynamic models, and as diagnostic data of loading systems with electric power. The described procedures serve as examples of repair diagnostic techniques in the top military units as well.

Autoloader functional diagram determination handling fixed ammunition

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 wirelessly to the data logger. The measurement results proved suitability of published method to be used to verify model calculations and to identify the input parameters for calculations. The analyses were proposed due to absence of appropriate technical documentation and for educational purposes. The findings are expected to be applicable for further technological modifications of the 73 mm cannon loading device to extend its operational time in case of upgrading.

Effect of weapon tilt on accuracy of sniper rifle

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.

Tracking, aiming, and hitting the UAV with ordinary assault rifle

The usage small-unmanned aerial vehicles (UAVs) is significantly increasing nowadays. They are being used as a carrier of military spy and reconnaissance devices (taking photos, live video streaming and so on), or as a carrier of potentially dangerous cargo (intended for destruction and killing). Both ways of utilizing the UAV cause the necessity to disable it. From the military point of view, to disable the UAV means to bring it down by a weapon of an ordinary soldier that is the assault rifle. This task can be challenging for the soldier because he needs visually detect and identify the target, track the target visually and aim on the target. The final success of the soldier’s mission depends not only on the said visual tasks, but also on the properties of the weapon and ammunition. The paper deals with possible methods of prediction of probability of hitting the UAV targets.