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A Confederate-built rough iron 24-pounder Coehorn at Petersburg in 1864 Coehorn at Fort King George. The original Coehorn was light enough to be moved by as few as two men, although a four-man crew was more practical for rapid movement. It proved immediately popular: the 74 used at Kaiserswerth were increased to over 300 at Bonn six months later.
With the 10-inch siege mortars at 875 yards, about 60% of the shells would fall within a 40-yard radius of the target. The 13-inch seacoast mortar could be expected to be more accurate. (Abbot 1867, p. 39) Coehorn mortars were lighter mortars, designed to be brought well forward in the trenches.
Ordnance ML 4.2 inch Mortar United Kingdom: World War II, Korea 107: 4.2-inch mortars M2 and M30 United States: World War II, Korea, Vietnam 140: 14 cm Minenwerfer M 15 Austria-Hungary: World War I 148: Coehorn mortar M. 1841 United States: 1841 150: Mortier de 150 mm T Mle 1916 Batignolles France: World War I 150: Mortier de 150 mm T Mle 1917 ...
A Guide to Modern Mortar Systems "Field Manual 3-22.90 – Mortars" (PDF). Department of the Army. December 2007. Archived from the original (PDF) on 17 February 2013 "Field Manual 3-22.91 – Mortar Fire Direction Procedures" (PDF). Department of the Army. 17 July 2008. Archived from the original (PDF) on 17 February 2013
Created Date: 8/30/2012 4:52:52 PM
For several centuries Coehorn mortars were fired indirectly because their fixed elevation meant range was determined by the amount of propelling powder. It is also reasonable conjecture that if these mortars were used from inside fortifications their targets may have been invisible to them and therefore met the definition of indirect fire.
One Coehorn mortar; One 10-inch siege mortar M. 1841; One 4-inch ordnance; Two 30-pounder Parrotts [4] [5] The following troops garrisoned at Fort Bunker Hill: 11th Regiment Massachusetts Volunteer Infantry; Company B, Main Coast Guards; Detachment 2d Company, New Hampshire Heavy Artillery; 150th Ohio National Guard; Battery G, 3rd United ...
One 10-inch siege mortar M. 1841; Two 24-pounder Coehorn mortars [2] The batteries were never completed on the east and west of the fort. If they had, an extra ten more guns could have been added. [2] The following elements garrisoned at the fort at some point during the war: 76th New York Volunteer Infantry