HMS'' Magdala'' was a

breastwork monitor A breastwork monitor was a modification of the monitor, a warship which was first built in the United States in 1861, designed by John Ericsson and distinguished by the first rotating gun turret, designed by Theodore Timby. The modified desig ...

of the

Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...

, built specifically to serve as a

coastal defence ship Coastal defence ships (sometimes called coastal battleships or coast defence ships) were warships built for the purpose of coastal defence, mostly during the period from 1860 to 1920. They were small, often cruiser-sized warships that sacrifi ...

for the harbour of

Bombay Mumbai ( ; ), also known as Bombay ( ; its official name until 1995), is the capital city of the Indian States and union territories of India, state of Maharashtra. Mumbai is the financial centre, financial capital and the list of cities i ...

(now

Mumbai Mumbai ( ; ), also known as Bombay ( ; its official name until 1995), is the capital city of the Indian state of Maharashtra. Mumbai is the financial capital and the most populous city proper of India with an estimated population of 12 ...

) in the late 1860s. She was ordered by the

India Office The India Office was a British government department in London established in 1858 to oversee the administration of the Provinces of India, through the British viceroy and other officials. The administered territories comprised most of the mo ...

for the

Bombay Marine The Royal Indian Navy (RIN) was the naval force of British India and the Dominion of India. Along with the Presidency armies, later the Indian Army, and from 1932 the Royal Indian Air Force, it was one of the Armed Forces of British India. Fr ...

. The original specifications were thought to be too expensive and a cheaper design was ordered. While limited to harbour defence duties, the breastwork monitors were described by Admiral

George Alexander Ballard Admiral George Alexander Ballard (7 March 1862 – 16 September 1948) was an officer of the Royal Navy and a historian. Biography Ballard was the eldest son of General John Archibald Ballard (1829–1880), and his wife Joanna, the daughter of ...

as being like "full-armoured knights riding on donkeys, easy to avoid but bad to close with." Aside from gunnery practice ''Magdala'' remained in Bombay Harbour for her entire career. The ship was sold for

scrap Scrap consists of recyclable materials, usually metals, left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap can have monetary value, especially recover ...

in 1903.

Design and description

In July 1866 the India Office asked for two floating batteries to defend Bombay and the

Controller of the Navy Controller may refer to: Occupations * Controller or financial controller, or in government accounting comptroller, a senior accounting position * Controller, someone who performs agent handling in espionage * Air traffic controller, a person w ...

Vice Admiral Vice admiral is a senior naval flag officer rank, usually equivalent to lieutenant general and air marshal. A vice admiral is typically senior to a rear admiral and junior to an admiral. Australia In the Royal Australian Navy, the rank of Vice ...

Spencer Robinson recommended that

monitor Monitor or monitor may refer to: Places * Monitor, Alberta * Monitor, Indiana, town in the United States * Monitor, Kentucky * Monitor, Oregon, unincorporated community in the United States * Monitor, Washington * Monitor, Logan County, Wes ...

s be used. He recommended a design with armour belt and protecting the gun turret, armed with the largest possible guns, which would cost £220,000. The India Office thought that this was too expensive and ordered a repeat of instead for only £132,400.Parkes, p. 167 The ships had a

length between perpendiculars Length between perpendiculars (often abbreviated as p/p, p.p., pp, LPP, LBP or Length BPP) is the length of a ship along the summer load line from the forward surface of the stem, or main bow perpendicular member, to the after surface of the ste ...

of , a

beam Beam may refer to: Streams of particles or energy *Light beam, or beam of light, a directional projection of light energy **Laser beam *Radio beam *Particle beam, a stream of charged or neutral particles **Charged particle beam, a spatially lo ...

of , and a draught of at

deep load The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weig ...

. They displaced . Their crew consisted of 155 officers and men.

Propulsion

''Magdala'' had two horizontal direct-acting steam engines, made by Ravenhill, each driving a single propeller. The ship's

boiler A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, centra ...

s had a working pressure of . The engines produced a total of on 21 October 1870 during the ship's

sea trial A sea trial or trial trip is the testing phase of a watercraft (including boats, ships, and submarines). It is also referred to as a "shakedown cruise" by many naval personnel. It is usually the last phase of construction and takes place on op ...

s which gave her a maximum speed of . ''Magdala'' carried of coal, enough to steam at .Silverstone, p. 165

Armament

The ''Cerberus''-class ships mounted a pair of

10-inch A phonograph record (also known as a gramophone record, especially in British English) or a vinyl record (for later varieties only) is an analog signal, analog sound Recording medium, storage medium in the form of a flat disc with an inscribed, ...

rifled muzzle-loading guns in each hand-worked turret. The shell of the gun weighed while the gun itself weighed . The gun had a

muzzle velocity Muzzle velocity is the speed of a projectile (bullet, pellet, slug, ball/ shots or shell) with respect to the muzzle at the moment it leaves the end of a gun's barrel (i.e. the muzzle). Firearm muzzle velocities range from approximately t ...

of and was credited with the ability to penetrate a nominal of

wrought iron Wrought iron is an iron alloy with a very low carbon content (less than 0.05%) in contrast to that of cast iron (2.1% to 4.5%), or 0.25 for low carbon "mild" steel. Wrought iron is manufactured by heating and melting high carbon cast iron in an ...

armour at . The guns could fire both

solid shot A round shot (also called solid shot or simply ball) is a solid spherical projectile without explosive charge, launched from a gun. Its diameter is slightly less than the caliber, bore of the gun barrel, barrel from which it is shot. A round s ...

and explosive shells. ''Magdala'' was rearmed in 1892 with four

breech-loading A breechloader is a firearm in which the user loads the ammunition from the breech end of the barrel (i.e., from the rearward, open end of the gun's barrel), as opposed to a muzzleloader, in which the user loads the ammunition from the ( muzzle ...

BL 8-inch guns.Roberts, p. 21

Armour

The ''Cerberus''-class ships had a complete

waterline belt that was thick amidships and thinned to at the ends. The superstructure and

conning tower A conning tower is a raised platform on a ship or submarine, often armoured, from which an officer in charge can conn (nautical), conn (conduct or control) the vessel, controlling movements of the ship by giving orders to those responsible for t ...

were fully armoured, the reason it was called a breastwork, with of wrought iron. The

gun turret A gun turret (or simply turret) is a mounting platform from which weapons can be fired that affords protection, visibility and ability to turn and aim. A modern gun turret is generally a rotatable weapon mount that houses the crew or mechanis ...

s had on their faces and on the sides and rear. All of the vertical armour was backed by of

teak Teak (''Tectona grandis'') is a tropical hardwood tree species in the family Lamiaceae. It is a large, deciduous tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters (panic ...

. The decks were thick, backed by of teak.

Service

HMS ''Magdala'' was laid down on 6 October 1868 by the Thames Ironworks in

Leamouth Leamouth is a locality in the Blackwall area of Poplar, in the London Borough of Tower Hamlets. The area takes its name from the former ''Leamouth Wharf'' and lies on the west side of the confluence of the Bow Creek stretch of the Lea, at it ...

London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...

. She was launched on 2 March 1870 and completed in November 1870. For her delivery voyage to India, ''Magdala'' was fitted with three temporary masts and made the trip under sail in the middle of winter without escort, as both her builders and the Royal Navy, considered her sufficiently seaworthy as to make the trip safely. Her life thereafter was wholly spent in Bombay Harbour, with occasional short trips to sea for firing practice. She was sold for scrap in January 1903.Silverstone, p. 249

Notes

References

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External links

Magdala & Abyssinia Slideshow
{{DEFAULTSORT:Magdala (1870) Cerberus-class monitors Ships built in Leamouth 1870 ships Victorian-era monitors of the United Kingdom