Technical Diagnostics of Tank Cannon Smooth Barrel Bore and Ramming Device

Jiri Balla; Stanislav Prochazka; Robert Jankovych; Stanislav Beer; Zbynek Krist; Michal Kovarik

doi:10.14429/dsj.65.8660

Jiri Balla Faculty of Military Technology, University of Defence, Kounicova
Stanislav Prochazka Faculty of Military Technology, University of Defence, Kounicova
Robert Jankovych Faculty of Mechanical Engineering, University of Technology, Technická
Stanislav Beer Faculty of Military Technology, University of Defence, Kounicova
Zbynek Krist Faculty of Military Technology, University of Defence, Kounicova
Michal Kovarik Faculty of Military Technology, University of Defence, Kounicova

DOI: https://doi.org/10.14429/dsj.65.8660

Keywords: Barrel bore wear, diagnostics, tank cannon, ramming device, extraction force, force gauge, and displacement gauge

Abstract

The technical diagnostics of 125 mm tank cannon 2A46 smooth barrel and ramming devices are discussed respectively. Focuses on barrel diagnostics and suggests new procedures based on reconstructed BG20 Gun Barrel Bore Gauge System, measuring internal diameter of the barrel bore. The new system measures throughout the whole barrel bore the inner diameter not only at the beginning of barrel bore as it was usually measured before. Different nature of barrel wear was revealed between barrels firing sub-calibre and high explosive projectiles. A method for ramming device diagnostics is presented. An accurate method was proposed, determining projectile extraction force from barrel, as one of the main ramming device parameters for weapons that are used in all areas of armed forces. Results are based on experimental methods assessing the extraction forces from barrel after projectile loading. These tests were performed as a series of tests with consequent technical diagnostics according to the new Czech Defence Standards (derived from NATO standards). The results are presented as the new methodologies for diagnostics of 125 mm barrel 2A46 and ramming devices of tank T-72 for use by technical logistic units in the Czech Republic Armed Forces.