USS Miantonomoh (1863)

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NameMiantonomoh
NamesakeMiantonomoh
Laid down1862
History
United States
NameMiantonomoh
NamesakeMiantonomoh
BuilderBrooklyn Navy Yard
Laid down1862
Launched15 August 1863
Commissioned18 September 1865
Decommissioned28 July 1870
FateScrapped, 1874
General characteristics
Class & typeMiantonomoh-class monitor
Displacement3,401 long tons (3,456 t)
Length250 ft (76.2 m) (o/a)
Beam53 ft 8 in (16.4 m)
Draft14 ft 9 in (4.5 m)
Depth16 ft (4.9 m)
Installed power
Propulsion2 shafts; 2 HRCR steam engines
Speed9 knots (17 km/h; 10 mph)
Complement150 officers and enlisted men
Armament2 × twin 15 in (381 mm) smoothbore Dahlgren guns
Armor
  • Side: 5 in (127 mm)
  • Turrets: 10 in (254 mm)
  • Pilothouse: 8 in (203 mm)
  • Deck: 1.5 in (38 mm)

The first USS Miantonomoh was the lead ship of her class of four ironclad monitors built for the United States Navy during the American Civil War. Completed after the war ended in May 1865, the ship made one cruise off the East Coast before she began a voyage across the North Atlantic in May 1866 to conduct a lengthy showing the flag mission in Europe. Miantonomoh was decommissioned upon her return in 1867, but was reactivated two years later and assigned to the North Atlantic Squadron before decommissioning again in 1870. The monitor was sold for scrap three years later as part of a scheme where the Navy Department evaded the Congressional refusal to order new ships by claiming that the Civil War-era ship was being repaired while building a new monitor of the same name.

Armament and armor

The Miantonomoh class was designed by John Lenthall, Chief of the Bureau of Construction and Repair, although the ships varied somewhat in their details. Miantonomoh was 250 feet (76.2 m) long overall, had a beam of 53 feet 8 inches (16.4 m) and had a draft of 14 feet 9 inches (4.5 m).[1] The ship had a depth of hold of 16 feet (4.9 m),[2] a tonnage of 1,564 tons burthen and displaced 3,401 long tons (3,456 t).[1] Her crew consisted of 150 officers and enlisted men.[3]

Miantonomoh was powered by a pair of horizontal-return connecting-rod steam engines designed by the Engineer-in-Chief of the Navy, Benjamin F. Isherwood. Each engine drove a propeller shaft[1] using steam generated by four Martin vertical water-tube boilers.[4] The engines were rated at 1,400 indicated horsepower (1,044 kW) and gave the ship a top speed of 9 knots (17 km/h; 10 mph).[3] She was designed to carry 300 long tons (305 t) of coal.[5]

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] A 5-by-15-inch (127 by 381 mm) soft iron band was fitted around the base of the turrets to prevent shells and fragments from jamming them as had happened during the First Battle of Charleston Harbor in April 1863.[7]

Construction and career

Notes

References

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