gun (light): 10 were cast at Seyfert, McManus & Co. and West Point foundries between 1855 and 1864. Pivot mounted on board ships such as , and (pre-) with a crew of 20 and a powderman. X-inch Dahlgren shell gun (heavy): 34 cast between 1862 and 1865. Designed from the beginning to fire shot against armored ships with heavier powder charges. Mounted on a pivot mount with a crew of 20 and a powderman. XI-inch XI-inch Dahlgren shell gun: 465 were cast at Alger; Builders; Fort Pitt; Hinkley, Williams & Co.; Portland Locomotive Works; Seyfert, McManus & Co.; Trenton Iron Works; and West Point foundries between 1856 and 1864. This is the only Dahlgren gun to have been designed both with and without a muzzle swell. The gun was typically mounted on a pivot or in a turret on a monitor. When mounted in a turret, the crew for an XI-inch Dahlgren was seven including powdermen. The crew for the gun when mounted on a pivot was 24 men and a powderman. XI-inch Dahlgrens were carried on , , , , and (1 XI-inch and 1 XV-inch short) class monitors as well as the original . , , and many other conventional ships carried XI-inch Dahlgrens on pivot mounts. A few larger river gunboats, such as and also carried XI-inch Dahlgrens. XIII-inch XIII-inch Dahlgren shell gun: The XIII-inch Dahlgren was originally intended for s but proved unsuccessful and the XV-inch Dahlgren was used instead. XV-inch XV-inch Dahlgren shell gun (short or Passaic): 34 were cast by the Fort Pitt Foundry between 1862 and 1864 . The first XV-inch guns' barrels were so short that the muzzle was inside the monitor's turret when the gun was discharged. The resulting blast and fumes in the turret would have made the gun impossible to work. The navy constructed smoke-boxes inside the turrets of the monitors equipped with the short XV-inch gun (see illustration), but the presence of the smoke-boxes slowed the rate of fire for the guns. When mounted in a turret, the crew for a XV-inch Dahlgren was 10 including powdermen. These were carried on (1 XI-inch and 1 XV-inch short) and early s. 15-inch Dahlgren guns for the Russian version of the Passaic, the , were produced at the new Aleksandrovsk gun factory in Petrozavodsk in Russian Karelia. XV-inch Dahlgren shell gun (long or "Tecumseh"): 86 were cast by the Alger,