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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.
The Coehorn mortar gained quick popularity, necessitating a new form of naval ship, ... "Field Manual 3-22.91 – Mortar Fire Direction Procedures" (PDF). Department ...
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 ...
In May 1701, Van Coehoorn demonstrated a light-weight mortar to William, later known as the Coehorn (sic). Designed to provide cover for infantry assaults, it was first used at Kaiserworth in 1702 and variations remained in service during the US Civil War in 1861. [ 28 ]
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 ...
The mortar had fallen out of general use in Europe by the Napoleonic era, although Manby Mortars were widely used on the coast to launch lines to ships in distress, and interest in their use as a weapon was not revived until the beginning of the 20th century. Mortars were heavily used by both sides during the American Civil War.