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Front cover – The M16A1 Rifle – Operation and Preventive Maintenance by Will Eisner, issued to American soldiers in the Vietnam War. An inadequately maintained firearm will often accumulate excessive fouling and dirt within the barrel and receiver, which not only can clog up the rifling and decrease the firearm's accuracy and precision, but can also interfere with the proper operation of ...
Diagram of internal ballistic phases. The burning firearm propellant produces energy in the form of hot gases that raise the chamber pressure which applies a force on the base of the projectile, causing it to accelerate. The chamber pressure depends on the amount of propellant that has burned, the temperature of the gases, and the volume of the ...
A cleaning rod is a firearm maintenance tool that can be used to clean the inside (bore) of a gun's barrel, and is made in different sizes for use on different barrel lengths, calibers and gauges. It is a sturdy, long, thin, straight rod typically made of metal, rigid plastic or carbon fiber , and usually has a handle at one end for gripping ...
The pressure wave from the explosive needs to act evenly on the rods over their length, so some sort of tamper is used to shape the shock wave similar to an explosive lens. The rods are sufficiently soft ( ductile ) to allow the expansion without breaking the rods or the welded joints, and the detonation velocity is limited to under 1,150 m/s ...
Harmonics: The act of firing a gun generates a rapid pressure increase within the barrel bore, causing the barrel to resonate and vibrate in a rope-like fashion. The resultant harmonic oscillations of the barrel affect the terminal phase of the projectile's internal ballistics and in turn the initial status of its external ballistics , and ...
Early in World War II, the British were in favour of "pattern harmonisation", a shotgun-like tactic which disperses the fire of multiple guns to gain a greater chance of a hit. [1] The Royal Air Force (RAF) tried various patterns of gun harmonisation, with the convergence area taking the form of a rectangle or a circle.
External ballistics: Different projectiles have different ballistic characteristics. Also, air conditions have an effect as well (temperature, wind, air pressure). Parallax correction: In general, the position of the gun and target spotting equipment (radar, mounted on the gun director, pelorus, etc) are in different locations on a ship. This ...
The successful British wire naval guns of World War I were typically shorter than German and US guns of the same calibre, which did not use wire-wound construction, e.g. British 45 calibres in length, or only 42 calibres in the 15-inch gun, compared to 50 calibres in guns of other countries. The method was found satisfactory for use with field ...