COUNTERMASS PROPULSION SYSTEM

The invention relates to a countennass propulsion system for shoulder-launched munitions, recoilless rifles, rockets and similar class weapon systems, fired from an enclosure and utilizing a Davis Gun propulsion system by accelerating a projectile in one direction and a countermass in the opposing direction to minimize recoil, light signature and acoustic signature of the weapon system. The provided countermass propulsion system comprises: a pressure vessel having a muzzle end and a breach end, wherein the vessel contains a projectile disposed at the muzzle end and a countennass disposed at the breach end; a propellant charge, disposed between the projectile and the countermass; a rupture disk disposed behind an igniter assembly and at a forward end of the countermass; and a projectile retention means that is connected to the projectile and the rupture disk, wherein said projectile retention means comprises a breakbolt. Système de propulsion à contre-masse pour des munitions lancées par l'épaule, fusils sans recul, fusées et systèmes d'armes de classe similaire, tirées d'une enceinte et utilisant un système de propulsion Davis Gun en accélérant un projectile dans une direction et une contre-masse dans la direction opposée afin de réduire au minimum le recul, la signature lumineuse et la signature acoustique du système d'arme.