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For the 8-inch siege mortar at a range of 800 yards, about 50% of the shells would fall within a 50-yard radius of the target. 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)
10-inch seacoast mortar M. 1841 United States: 1841 260: 26 cm Minenwerfer M 17 Austria-Hungary: World War I 320: 320 mm Type 98 mortar Japan: World War II: 325: Mortier de 12 Gribeauval Kingdom of France: 1781 330: 13-inch seacoast mortar M. 1861 United States: 1861 914: Little David United States: World War II: 914: Mallet's Mortar United ...
Union battery with 13-inch (330 mm) seacoast mortars, Model 1861, during siege of Yorktown, Virginia 1862. McClellan had not given up hope of turning Yorktown. The commander of the York River flotilla, Missroon, had consistently refused to even approach the Yorktown batteries, citing the weakness of his ship.
Federal battery with 13-inch seacoast mortars, Model 1861, during siege of Yorktown, Virginia 1862. More featured pictures
Siege and coastal mortars ranged from 8-inch models which could accompany an army's siege train to massive 13-inch monsters which had to be disassembled and carried by rail or ship to travel any distance. The Coehorn mortar however was a type of small mortar light enough
These heavy guns were intended to be mounted in seacoast fortifications. 8-inch, 10-inch, 13-inch, 15-inch, and 20-inch bore (20, 25, 33, 38, and 51 cm) Rodman guns were produced. Other than size, the guns were all nearly identical in design, with a curving bottle shape, a large flat cascabels , and ratchets or sockets for the elevating mechanism.
Enjoy a classic game of Hearts and watch out for the Queen of Spades!
USS John Griffith was a mortar schooner acquired by the Union Navy during the American Civil War.She was used for various purposes, but especially for bombardment because of her large 13-inch mortar and 12-pounder howitzers that could fire up and over tall defensive riverbanks.