United States floating battery Demologos

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Launching of Demologos (1814).jpg
Demologos, first steam warship
History
Naval jack of the United States (1795-1818).svg United States
NameDemologos or Fulton
Ordered1814
Buildercompany belonging to Robert Fulton
Laid down20 June 1814
Launched29 October 1815
CommissionedJune 1816
FateBlown up, 4 June 1829
General characteristics
Class and typeSteam battery
Displacement1,450 tons
Length153 ft 2 in (46.69 m)
Beam58 ft (18 m)
Draft13 ft (4.0 m)
PropulsionSteam, 1 cylinder 120 hp (89 kW)
Speed5.5 knots (10.2 km/h; 6.3 mph)
Armament30 × 32-pounder guns 2 × 100-pounder Columbiads fitted to fire at enemy ships below their waterline [1]
Armor5' reinforced timber planking

Demologos was the first warship to be propelled by a steam engine. She was a wooden floating battery built to defend New York Harbor from the Royal Navy during the War of 1812. The vessel was designed to a unique pattern by Robert Fulton, and was renamed Fulton after his death. Because of the prompt end of the war, Demologos never saw action, and no other ship like her was built.

Contents

History

Robert Fulton, designer Fulton.jpg
Robert Fulton, designer

On 9 March 1814, Congress authorized the construction of a steam warship to be designed by Robert Fulton, a pioneer of commercial steamers in North America. The construction of the ship began on 20 June 1814, at the civilian yard of Adam and Noah Brown, and the ship was launched on 29 October. After sea trials she was delivered to the United States Navy in June 1816. The ship was never formally named; Fulton christened it Demologos or Demologus, though following his death in February 1815, the ship was named Fulton.

By the time she was completed, the war for which Demologos had been built had ended. She saw only one day of active service, when she carried President James Madison on a tour of New York Harbor. A two-masted lateen rig was added by the orders of her first commander, Captain David Porter. In 1821 her armament and machinery were removed. The remainder of her career was spent laid up in reserve; after 1825 she served as the floating barracks for Brooklyn Navy Yard. She came to an end on 4 June 1829 in a gunpowder explosion. She exploded while lying at anchor, killing an officer and 47 men. [2] [3]

Design and impact

Demologos had a unique and innovative design. A catamaran, her paddlewheel was sandwiched between two hulls. Each hull was constructed 5 ft (1.5 m) thick for protection against gunfire. The steam engine, mounted below the waterline in one of the hulls, was capable of giving 5.5 knots (10.2 km/h) speed in favorable conditions. Although designed to carry 30 32-pounder guns, 24 port and starboard, 6 fore and aft, the Navy had trouble acquiring sufficient guns, and a varying number were mounted while in actual service. Demologos was also fitted for two 100-pounder columbiads, one mounted fore and another aft, these weapons were never actually installed.

Three-view of Demologos as originally portrayed to the US government. The resulting vessel differed greatly from this early proposal. Demologos.jpg
Three-view of Demologos as originally portrayed to the US government. The resulting vessel differed greatly from this early proposal.

Fulton's design solved several of the problems inherent in warships powered by paddlewheels which led to the adoption of the paddle-steamer as an effective warship in following decades. By placing the paddlewheel centrally, sandwiched between two hulls, Fulton protected it from gunfire; this design also allowed the ship to mount a full broadside of guns.

The steam engine offered the prospect of tactical advantage against sail-powered warships. In a calm, sailing ships depended on the manpower of their crews to tow the ship from the boats, or to kedge with anchors. Demologos, with steam, might have found it easy to outmaneuver a ship-of-the-line in calm weather.

The innovative construction and steam power also fundamentally limited the role Demologos could fill. With an unreliable engine and a hull unsuited to seaways, Demologos was unable to travel on the high seas. The United States Navy planned to build a number of similar steam batteries, but none of these plans got off the drawing board until the USS Fulton of 1837. A number of European navies also considered acquiring the Demologos, but these inquiries came to nought.

The Demologos was ultimately a dead end in the introduction of steam power to the warship. Armed paddle steamers proliferated in the 1830s and 1840s as armed tugs and transports. During the Civil War, the United States Navy operated a number of iron clad steam-powered paddle-wheel gunboats as a part of the Mississippi River Squadron. Known as City-class ironclad gunboats as they were named after cities on the Mississippi River or its tributaries, these ships utilized a double-hulled configuration similar to Fulton's design, with the paddle wheel in the center. The wheel was protected by armored plate, allowing full broad-sides, as well as bow and stern shots. An example, USS Cairo, is on display at the Vicksburg National Military Park. Paddle-wheel propulsion, more usually side-paddle configurations, in military use continued until World War II with the training aircraft carriers USS Wolverine and USS Sable. These designs were typically limited to use in the brown-water navy or on large lakes.

Steam-powered paddle wheel propulsion would ultimately be eclipsed by the introduction of the screw propeller in the 1840s, enabling steam-powered version of the ship of the line and the frigate before steam power was properly adapted for use in a blue water navy.

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Adam and Noah Brown American shipbuilders

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This glossary defines the various types of ships and accessory watercraft that have been used in service of the United States. Such service is mainly defined as military vessels used in the United States Navy and United States Coast Guard, as well as the defunct, incorporated, or renamed institutions such as the United States Revenue Cutter Service. Service of the United States can also be defined in this context as special government missions in the form of expeditions, such as the Wilkes Expedition or the North Pacific Exploring and Surveying Expedition. The scope of the glossary encompasses both the "Old Navy" of the United States, from its beginnings as the "Continental Navy", through the "New Navy" and up to modern day. The watercraft included in the glossary are derived from United States ships with logbooks published by the National Archives and Records Administration.

References

  1. "Chapter 11". www.museum.state.il.us.
  2. "Fleet of Fifty Warships Built in the Brooklyn Navy Yard". Brooklyn Daily Eagle. 12 May 1910. p. 22. Retrieved 16 August 2018 via Brooklyn Public Library; newspapers.com. Open Access logo PLoS transparent.svg
  3. "THE BROOKLYN NAVY YARD.; Its Early History and Present Condition. Who Have Been Commanders--Vessels Pitted Oat--The Workmen and the Buildings". The New York Times. 13 March 1870. Retrieved 4 October 2018. Open Access logo PLoS transparent.svg

Further reading