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Drawing comparing Model 1844 8-inch columbiad and Model 1861 10-inch "Rodman" columbiad. The powder chamber on the older columbiad is highlighted by the red box. The Rodman gun is any of a series of American Civil War–era columbiads designed by Union artillery officer Thomas Jackson Rodman [1] (1815–1871).
Just prior to the American Civil War, Ordnance Corps officer Thomas Jackson Rodman developed an improved version of the columbiad, which became known by his name. Specifically the Rodman gun was designed to reduce cracking and other weaknesses found in such large iron castings. The process involved ensured the iron cooled evenly from the inside ...
Thomas Jackson Rodman (July 31, 1816 – June 7, 1871) was an American artillerist, inventor, ordnance specialist, and career United States Army officer. [1] He served as a Union Army officer during the American Civil War, in which he was noted for his many improvements and innovations concerning the artillery used by the Union forces.
The cannon are 8-inch converted rifles (lined down from 10-inch Rodman guns) and a 15-inch Rodman gun, typical of the post-Civil War era. The Statue of Liberty is built on top of Fort Wood of the Second System. Seacoast defense was a major concern for the United States from its independence until World War II.
Wartime production included large cast hexagonal powder grains for Rodman guns; and an 8-inch (20 cm) Columbiad was installed at Gambo to test this specialized powder. Production increased to 1250 tons per year [ 8 ] as accidental explosions killed one employee on 8 July 1861, three on 7 July 1862, and another on 14 November 1863. [ 5 ]
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Rodman's guns were improvements to the Columbiads that Bomford's father had invented. [4] Under the law (July 17, 1862), and being over the age of 62, Brigadier General James Bomford was retired from duty June 8, 1872, after 43 distinguished years of service.
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