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The gun was invented by Captain Robert Parker Parrott, [1] a West Point graduate. He was an American soldier and inventor of military ordnance. He resigned from the service in 1836 and became the superintendent of the West Point Foundry in Cold Spring, New York. He created the first Parrott rifle (and corresponding projectile) in 1860 and ...
Muzzle velocity. 1,250 ft/s (381 m/s) Effective firing range. 1,900 yd (1,700 m) at 5°. The 20-pounder Parrott rifle, Model 1861 was a cast iron muzzle-loading rifled cannon that was adopted by the United States Army in 1861 and employed in field artillery units during the American Civil War. As with other Parrott rifles, the gun breech was ...
Tris (pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C6F5)3B. It is a white, volatile solid. The molecule consists of three pentafluorophenyl groups attached in a "paddle-wheel" manner to a central boron atom; the BC3 core is planar. It has been described as the “ideal Lewis acid ” because of its high ...
Bromochlorodifluoromethane (BCF), also referred to by the code numbers Halon 1211 and Freon 12B1, is a haloalkane with the chemical formula C F 2 Cl Br. It is used for fire suppression, especially for expensive equipment or items that could be damaged by the residue from other types of extinguishers. [ 1 ]
Dahlgren guns were muzzle-loading naval gun designed by a United States Navy Rear Admiral John A. Dahlgren (November 13, 1809 – July 12, 1870), mostly used in the American Civil War. Dahlgren's design philosophy evolved from an accidental explosion in 1849 of a 32 lb (14.5 kg) gun being tested for accuracy, killing a gunner.
Four lengths of iron 24-pounders are mentioned in a notebook from the 1720s: 10 ft (3.0 m), 9 + 1 ⁄ 2 ft (2.9 m), 9 ft (2.7 m), and 8 + 1 ⁄ 2 ft (2.6 m) long. Ten surviving guns which are likely examples of the 9 1 ⁄ 2 -foot version weigh between 48 and 49 3 ⁄ 4 hundredweight.
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