If gases are directed upward, they will exert a downward force and counteract muzzle rise. The angle toward which the gases are directed will fundamentally affect how the brake behaves. The momentum of the diverted gases thus does not add to the recoil.
The strategy of a muzzle brake is to redirect and control the burst of combustion gases following the departure of a projectile.Īll muzzle brake designs share a basic principle: to partially divert combustion gases from the muzzle end of the bore at a (generally) perpendicular angle to the long axis of the barrel. Brakes most often utilize slots, vents, holes, baffles, and similar devices. This consists of a small length of tubing (mounted at right angles) at the end of the barrel. Muzzle brakes are simple in concept, such as the one employed on the 90 mm M3 gun used on the M47 Patton tank.
MUZZLE BRAKE FULL
The M1946 Sieg automatic rifle had an unusual muzzle brake that made the rifle climb downward, but enabled the user to fire it with one hand in full automatic. If that line of force is above the center of the contact points, this creates a moment or torque (rotational force) that causes the firearm to rotate and the muzzle to rise. The reactive forces from the fired bullet and propellant gases exiting the muzzle act directly down the centerline of the barrel. The muzzle rises primarily because, for most firearms, the centerline of the barrel is above the center of contact between the shooter and the firearm's grip and stock. Firearms with less height from the grip line to the barrel centerline tend to experience less muzzle rise. The interchangeable terms muzzle rise, muzzle flip, or muzzle climb refer to the tendency of a handheld firearm's front end (the muzzle end of the barrel) to rise after firing. The forces A and B operating over moment arm/height C create torque or moment D, which rotates the firearm's muzzle up as illustrated at E The height difference between barrel centerline and average point of contact is height C. The shooter resists the forces by contact with the gun at grips and stock B. Projectile and propellant gases act on barrel along barrel center line A.
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