Her main battery consisted of four smoothbore, muzzle-loading, 15-inch (381 mm) Dahlgren guns mounted in two twin-gun turrets, one each fore and aft of the single funnel.[1] Each gun weighed approximately 43,000 pounds (20,000 kg). They could fire a 350-pound (158.8 kg) shell up to a range of 2,100 yards (1,900 m) at an elevation of +7°.[6]
The sides of the hull of the Miantonomoh-class ships were protected by five layers of 1-inch (25 mm) wrought-iron plates that tapered at their bottom edge down to total of 3 inches (76 mm), backed by 12–14 inches (305–356 mm) of wood. The armor of the gun turret consisted of ten layers of one-inch plates and the pilot house had eight layers. The ship's deck was protected by armor 1.5 inches (38 mm) thick.[4] The bases of the funnel and the ventilator were also protected by unknown thicknesses of armor.[3]
Construction and career
Tonawanda, named after Tonawanda Creek, New York,[7] was laid down in 1863 at the Philadelphia Navy Yard, Philadelphia, Pennsylvania, launched on 6 May 1864, and commissioned on 12 October 1865[1] with CommanderWilliam Ronckendorff in command. Completed too late for service in the war, Tonawanda was decommissioned at the Washington Navy Yard on 22 December. She was reactivated on 23 October 1866 to serve as a training ship at the United States Naval Academy in Annapolis, Maryland. The ship was renamed Amphitrite on 15 June 1869 and she was decommissioned in 1872.[7] By this time her wooden hull was rotting[2] and she was sold for scrap in 1873 to Harlan and Hollingsworth Co. of Wilmington, Delaware.[7] Although Congress was informed by the Navy Department that the Civil War-era ship was being repaired, a new iron-hulled monitor of the same name was built with repair money and the proceeds of her sale because Congress refused to fund any new construction at this time.[3]
Olmstead, Edwin; Stark, Wayne E. & Tucker, Spencer C. (1997). The Big Guns: Civil War Siege, Seacoast, and Naval Cannon. Alexandria Bay, New York: Museum Restoration Service. ISBN0-88855-012-X.
Silverstone, Paul H. (2006). Civil War Navies 1855-1883. The U.S. Navy Warship Series. New York: Routledge. ISBN0-415-97870-X.
"Tonawanda I (Monitor)". Dictionary of American Naval Fighting Ships. Naval History and Heritage Command. 30 September 2015. Retrieved 19 September 2020.