On the basis of analyzing the performance of the underwater pistol, the paper presents a theoretical model for analysing the dynamics of firing mechanism of underwater pistol with the with the resistance of water acting on firing pin and slide. The result of this research can be applied to design the underwater pistol and underwater firearm. | 61 TẠP CHÍ PHÁT TRIỂN KH&CN, TẬP 20, SỐ K2-2017 Dynamic analysis of firing mechanism of underwater pistol Dung Nguyen Thai, Hung Nguyen Van Abstract — The important problem of designing underwater pistol was analysed and calculated the dynamics of firing mechanism. On the basis of analyzing the performance of the underwater pistol, the paper presents a theoretical model for analysing the dynamics of firing mechanism of underwater pistol with the with the resistance of water acting on firing pin and slide. The result of this research can be applied to design the underwater pistol and underwater firearm. In the design process, the dynamic analysis of firing mechanism is a fundamental problem and very important [3]. So the article focuses on solving this problem with the research object is firing mechanism of SPP-1M underwater pistol. Index Terms—Dynamics, Firing mechanism , Resistance of water, Underwater pistol. a) 1 INTRODUCTION T HE underwater pistol is designed to destroy enemy personnel at ranges of up to 20m under water (depending on diving depth) [1]. Firing under water is possible from all swimmer positions as well as against surface targets from under water. The pistol is intended for combat swimmers. Two kinds of typical underwater pistol current are HKP11 of Germany () and SPP-1M of Russian () [2]. In Vietnam, the research on underwater pistol is limited and water commando forces have not been equipped with this weapon. The researches are mainly focused on projectile's motion under water. So design underwater pistol has become a hot topic. Manuscript Received on July 13th, 2016. Manuscript Revised December 06th, 2016. This research is funded by the state-level project “Design and manufacture underwater pistol and projectile to serve the water commando forces” code: . We are also grateful to our colleagues from Department of Weapons for valuable discussions which help to conduct the study. Dung Nguyen Thai is Dean of the
