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The abandonment of the Armstrong breech-loading design led Britain to begin a major program of building rifled muzzle-loaders to equip its fleet. The Armstrong 110-pound gun was succeeded by various RML 7 and 8-inch guns. 7-inch Armstrong breech-loaders under construction at the time of cancellation were completed as RML 64-pounder muzzle-loaders.
Whitworth also designed a large rifled breech-loading gun with a 2.75 inches (69.85 mm) bore, a 12 pounds 11 ounces (5.75 kg) projectile and a range of about 6 miles (10 km). The spirally-grooved projectile was patented in 1855.
Towards the breech, this was replaced by a liner. Over the A-tube were the breech piece and a long B-hoop. The 1 C hoop was over both and interlocked with them. The 2 C hoop was in front of it and the 3 C hoop was over the breech piece. The trunnion was shrunk over parts of the 1 C and 3 C hoops. An F ring kept the trunnions in place to the front.
The Armstrong Breech Loading 12 pounder 8 cwt, later known as RBL 12 pounder 8 cwt, was an early modern 3-inch rifled breech-loading field gun of 1859. Design
The first modern breech-loading rifled gun is a breech-loader invented by Martin von Wahrendorff with a cylindrical breech plug secured by a horizontal wedge in 1837. In the 1850s and 1860s, Whitworth and Armstrong invented improved breech-loading artillery.
The 12-pdr rifle was designed in the early 1850s by British manufacturer Joseph Whitworth, who had recently been contracted to improve the Pattern 1853 Enfield.During his experiments with the Enfield, Whitworth was inspired to begin experimenting with a hexagonally-rifled barrel; Whitworth would later apply these principles to his field guns.
A rifled breech loader (RBL) is an artillery piece which, unlike the smoothbore cannon and rifled muzzle loader which preceded it, has rifling in the barrel and is loaded from the breech at the rear of the gun. The spin imparted by the gun's rifling gives projectiles directional stability and increased range. Loading from the rear of the gun ...
It consisted of only 4 parts : steel A tube, cascabel, B tube and breech coil. 136 were made. Mark IV, introduced 1869, and V incorporated a thinner steel A tube and 2 breech coils. The explanation for separating the heavy breech coil of Mk III into a coiled breech piece covered by a breech coil was "the difficulty of ensuring the soundness of ...