The Application of Reverse Jet Gas Technology in Improving Firing Accuracy of a Machine Gun System

doi:10.3969/j.issn.1000-1093.2015.12.005

Abstract

Abstract: The reverse jet gas technology is proposed to improve the firing accuracy of a 12.7 mm heavy machine gun system. The nozzles are designed at the different positions of the gun barrel, and 3 operating modes of nozzles are then designed for comparison. An accurate rigid-flexible coupling multi-body model of the machine gun system is then established based on related experimental data，and the muzzle dynamic responses are obtained through dynamic simulation. Based on the exterior ballistic theory and the boundary conditions, the bullet dispersions are obtained with a firing distance of 100 m, and the improved conditions of the firing accuracy of the machine gun system are compared. The results show that the initial displacement, firing angle and velocity are stable with little fluctuation when the nozzle thrusts form a moment. The radius of 50% scattered circle is decreased by about 72.3%. The reverse jet gas technology can effectively improve the firing accuracy of the machine gun system.

Key words: ordnance science and technology, firing accuracy, nozzle, rigid-flexible coupling dynamics, vibration, machine gun system

CLC Number:

TJ25

HUA Hong-liang， LIAO Zhen-qiang， SONG Jie， QIU Ming， XIAO Jun-bo. The Application of Reverse Jet Gas Technology in Improving Firing Accuracy of a Machine Gun System[J]. Acta Armamentarii, 2015, 36(12): 2241-2246.

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