Generolo Jono Žemaičio Lietuvos karo akademija

This paper evaluates the influence of extended stand-off distance on the performance of 3D-printed copper-filled shaped charge liners. The study follows a previous experiment in which complete perforation was achieved at stand-off distances of 0, 15, 30 and 60 mm. Two additional distances, 100 and 150 mm, were tested using the same charge configuration. The results were assessed qualitatively based on penetration morphology. Complete perforation was achieved in all cases, but the 150 mm configuration showed reduced channel regularity and probable loss of jet coherence. The most favorable morphology was observed at 60 mm.

This paper examines how uncrewed platforms and contemporary sensor suites may extend engineer reconnaissance of water obstacles in support of river-crossing planning. The paper combines a structured review of Czech doctrinal practice and candidate sensor-platform combinations with a field experiment carried out on a selected section of the River Svratka, using unmanned aerial vehicle (UAV)-borne Light Detection and Ranging (LiDAR), UAV-borne ground-penetrating radar (GPR) and Global Navigation Satellite System (GNSS) control points. The combined evaluation indicates that LiDAR is highly effective for bank geometry and approach assessment, whereas GPR can complement it by indicating the longitudinal bed profile and sediment interfaces, albeit with greater interpretative uncertainty.

The support of mobility is one of the main tasks of engineer units. The mobility consists of different parts – mobility of low-endurable terrain, watercourses, forests etc. In this paper the authors focused only to one area – trafficability of areas covered by snow. The snowy terrain covered most of areas, not only in the Czech Republic, during the winter season. But the mobility must be ensured even in such conditions. In some cases, the vehicles mire in the snow layer and they have to be rescued. In the others, the convoy of vehicles stop before the untrafficable place and they have to overcome it. It is not always possible to bypass the place and the units have to negotiate this area. But the removal of snow is very time and human consuming. So it was decided to undergo testing materials suitable for these purposes. The aim of this work is to evaluate the using of perspective materials for self-rescuing works in snow as well as for the negotiation of untrafficable terrain due to the layer of snow. And all this makes it possible to improve the ability of negotiation obstacles such as snowy terrain and thus better mobility of the troops even in such conditions. [1,2,3]