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1,436 feet per second (438 m/s) Maximum firing range. 3,300 yards (3,018 m) (shrapnel) 4,000 yards (3,658 m) (ring) [1] The Ordnance RML 2.5-inch mountain gun was a British rifled muzzle-loading mountain gun of the late 19th century designed to be broken down into four loads for carrying by man or mule. It was primarily used by the Indian Army.
The gun was used notably in the Gallipoli Campaign in 1915 by two Indian Army units, the 21st (Kohat) Mountain Battery (Frontier Force) and 26th (Jacobs) Mountain Battery of the 7th Indian Mountain Brigade with 6 guns each at Anzac, and by the Scottish Territorial Force unit, the 4th Highland (Mountain) Brigade, Royal Garrison Artillery ...
The gun was an improved version of the 1901 BL 10-pounder mountain gun. The new 1911 version improved on the 1901 gun with a new pole trail, recoil buffer, recuperator and gun shield, and increased shell weight from 10 to 12.5 lb (5.7 kg). It was a screw gun design, where the barrel could be separated into two parts via a screw joint.
An interrupted screw or interrupted thread is a mechanical device typically used in the breech of artillery guns. It is believed to have been invented in 1845. [1] The system has also been used to close other devices, including the joint between helmet (bonnet) and breastplate (corselet) of standard diving suit helmets, and the locks of diving ...
Welin breech-block of a 16-inch Mk 6 gun on USS Alabama (BB-60), 1943. Note the four separate thread "steps" on the block which engage with matching steps in the breech when the block is swung up and inwards and rotated slightly clockwise. The Welin breech block was a revolutionary stepped, interrupted thread design for locking artillery ...
By type. v. t. e. 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.
The Armstrong RBL 7-inch gun, also known as the 110-pounder, [4] was a heavy caliber Armstrong gun, an early type of rifled breechloader. William Armstrong 's innovative combination of a rifled built-up gun with breechloading had proven suitable for small cannon. When it was applied to a 7-inch gun, it proved that the pressure caused by the ...
An RML 7-pounder Mountain Gun appears to be present in a photograph by John Burke (photographer) from the Second Anglo-Afghan War (November 1878 – September 1880). The war began when Great Britain, fearful of what it saw as growing Russian influence in Afghanistan, invaded the country from British India. The first phase of the war ended in ...