Effect of the Man-Weapon System on the Trajectory of a Projectile Fired from a Machine Pistol

Abstract

The process of burst-firing two projectiles from a Skorpion vz. 61 7.65 mm calibre machine pistol was recorded during a test at a firing range operated by the Polish Police. This experimental test involved Browning 7.65 x 17 mm SR ammunition rounds. The shots were fired by a Police Special Forces operative. The shots were recorded with a Phantom v.9.1 slow-motion video camera, complete with the essential accessories. TEMA, a software suite dedicated to video recording analyses, was used to determine the initial kinematic parameters of flight for each of the two projectiles. By applying the theorem of momentum and spin change, a theoretical projectile flight model was developed with a respective simulation runtime in SciLab. The projectile flight results were verified with the experimental test results to validate the developed model. Having delivered a reliable projectile flight model, an analysis was carried out to study the effectiveness of the shots fired by the Police Special Forces operative towards a target 30 metres away. This paper presents a determined process of burst firing of two projectiles. It is also a representative example of repetitive shooting. The ultimate task of this research is to develop guidelines for the design of machine pistol dynamic properties that reduce the scatter of projectiles shot in series.