HMS Dreadnought (1906)

HMS Dreadnought 1906 H61017.jpg
Career Royal Navy Ensign
Name: HMS Dreadnought
Ordered: 1905
Builder: HM Dockyard, Portsmouth
Laid down: 2 October 1905
Launched: 10 February 1906
Commissioned: 2 December 1906
Decommissioned: 1919
Fate: Scrapped 1923
General characteristics
Displacement: 18,420 tons
Length: 527 ft (161 m) oa
Beam: 82 ft (25 m)
Draught: 26 ft (7.9 m)
Propulsion:

18 Babcock & Wilcox 3-drum water-tube boilers
Parsons single-reduction geared steam turbines

22,500 shp (17 MW) on 4 shafts
Speed: 21 kt (39 km/h)
Range: 900/2,900 tons coal, 1,120 tons oil,
6,620 nmi (12 260 km) at 10 kt (19 km/h)
4,910 nmi (9090 km) at 18.4 kt (34 km/h)
Complement: 695–773
Armament:
  • 10 x BL 12 in (305 mm) L/45 Mk.X guns, 5 twin B Mk.VIII turrets (one forward, two aft, two wing)
  • 27 × 12-pdr 18 cwt L/50 Mk.I guns, single mountings P Mk.IV
  • 5 × 18 in (457 mm) submerged torpedo tubes
Armour:
  • Belt: 4 to 11 in (100 to 280 mm) midship, 2.5 in (64 mm) at ends
  • Deck: up to 3 in (75 mm)
  • Turrets: 11 in (280 mm)
  • Barbettes: up to 11 in (280 mm)
  • Conning tower: 11 in (280 mm)

The sixth HMS Dreadnought of the Royal Navy was a battleship that revolutionized naval power when she entered service in 1906. Dreadnought represented such a marked advance in naval technology that her name came to be associated with an entire generation of battleships, the "dreadnoughts", as well as the class of ships named for her, while the generation of ships she made obsolete became known as "pre-dreadnoughts".

Dreadnought was the first battleship of her era to have a uniform main battery, rather than having a few large guns complemented by a heavy secondary battery of somewhat smaller guns. She was also the first capital ship to be powered by steam turbines, making her the fastest battleship in the world at the time of her completion.

Her launch helped spark a major naval arms race as navies around the world rushed to match her, particularly the German navy in the build up to World War I.[1]

Contents

Genesis

Battleships of the era typically carried four large guns mounted fore and aft in twin turrets, with a number of smaller-calibre guns ranged along the sides of the ship, often in armoured turrets or casemates. This arrangement had several disadvantages: the lateral guns could only fire at targets on their side, while rotating turrets mounted on the centreline could fire to either side. Water entering through the many gunports was a hazard in heavy seas. Furthermore, each calibre of gun had different ballistic properties, which greatly complicated gunnery, especially when watching for splashes. Either the smaller-calibre guns would have to hold fire to wait for the slower-firing heavies, losing the advantage of their faster rate of fire, or it would be uncertain whether a splash was due to a heavy or a light gun, making ranging and aiming unreliable.

The invention by Charles Algernon Parsons of the steam turbine in 1884 led to a significant increase in the speed of ships with his dramatic unauthorised demonstration of Turbinia with her speed of up to 34 knots (63 km/h) at the Spithead Navy Review in 1897. After further trials and construction of two turbine powered destroyers, HMS Viper and HMS Cobra, the Admiralty confirmed in 1905 that future Royal Navy vessels were to be turbine powered.

"All-big-gun" concepts

The idea of "all-big-gun" warships, capable of firing powerful guns from a long distance, seems to have emerged as the threat from torpedoes became more potent. The Italian naval architect Vittorio Cuniberti first articulated the concept of an all-big-gun battleship in 1903 (although British admiral Jackie Fisher claimed the idea had occurred to him by 1900). When the Italian Navy didn't pursue his ideas, Cuniberti wrote an article in Jane's Fighting Ships propagating his concept. He proposed an "ideal" future British battleship of 17,000 tons, with a main battery of twelve 12-inch (30 cm) guns, 12 inch belt armour, and speed of 24 knots (44 km/h).

Japanese development (1904–1905)

The Russo–Japanese War (1904–1905) provided operational experience to validate the concept. The Russian Navy was decisively defeated during the naval battles of the Russo–Japanese War (1904–1905), especially at the Battle of Tsushima (May 1905), by the modern Imperial Japanese Navy which was equipped with modern-era battleships, mostly of British design. The events of the battle confirmed to the world that only the biggest guns mattered in naval battles at that time. As secondary guns grew in size, spotting and discriminating between splashes of main and secondary guns became problematic. The Battle of Tsushima demonstrated that damage from the main guns was much greater than secondary guns. In addition, the battle demonstrated the practicality of gun battles beyond the range of secondary guns (12,000 yards / 11 km). The United States, Japan, and Britain all realised this and launched plans for all-big-gun ships. During the battle, Royal Navy observers onboard Japanese ships made reports regarding the battle. These reports were analysed by the Admiralty in London and the approval to lay the keel of HMS Dreadnought was granted in October of 1905.

Pre-Dreadnought Imperial Japanese Navy battleship Mikasa from Jane's Fighting Ships 1906-07

The Imperial Japanese Navy's Satsuma was the first battleship in the world to be designed (1904) and laid down (15 May 1905) as an all-big-gun battleship, five months before Dreadnought, although gun shortages only allowed her to be equipped with four of the twelve 12-inch (30 cm) guns that had been planned.

American development

Influenced by William S. Sims, Americans also worked on an all-big-gun design around the same time as Dreadnought: USS South Carolina and USS Michigan were presented to Congress in 1904. The Americans moved slowly. The ships were not authorised until the spring of 1905 and not laid down until the autumn of 1906, after Dreadnought. The South Carolina class carried all of their main guns on the centreline, avoiding the wing turrets favoured by the British. Unlike Dreadnought, they used triple-expansion machinery, not the latest and much more powerful steam turbines developed on Tyneside, in England, by Charles Algernon Parsons a few years before.

British development

A 1907 painting of the Dreadnought

Britain, led by Admiral Sir John "Jackie" Fisher, who became First Sea Lord in 1904, took the lead. Fisher's "Committee of Designs" which he assembled in December 1904 consisted of the Director of Naval Construction and other senior figures. This generated the design for Dreadnought. In order to have the new ships which he desired, Fisher had to make them financially attractive as well - showing that they would cost less to build and run than the current battlefleet. Dreadnought was laid down and assembled with unparalleled speed in Portsmouth Royal Dockyard. She was laid down on 2 October 1905,[2] and completed just 14 months later in December 1906 (according to Conway's,[2] a basin trial in October 1906 was treated "for publicity purposes ... as completion", thereby providing official sanction for the often-repeated claim that she was built in a year and a day[3]). Fisher had originally advocated a Royal Navy based around submarines and fast torpedo boats, and had subsequently tempered his revolutionary ideas with a vision of fast, all-big-gun battlecruisers, which would have the firepower and speed to engage battleships and cruisers, albeit with much less armour protection than the former. Fisher felt that speed was a better defence than armour. Although the battlecruiser concept would become popular in the run-up to World War I, Fisher was nonetheless forced by the Admiralty to create an all-big-gun battleship instead.

Technology

Plan and profile of HMS Dreadnought
from The Naval Annual 1913.

The concept was simple, and had been a consideration among naval planners for a few years. Dreadnought would use steam turbines in place of the older triple-expansion engines that had powered almost all previous ships, giving her a design speed of a steady 21 knots (39 km/h). This would allow her to outrun any existing battleship with comparable firepower, while she could outgun any faster vessel. Submarines were largely ignored. Thus protected from smaller ships, lighter guns that would normally be placed along the sides of the ship to deal with them could be omitted. This left considerably more room for the largest guns, which were placed in turrets on the main deck.

Dreadnought mounted five two-gun turrets. Three turrets were located conventionally along the centreline of the ship, with one fore (A turret) and two aft (X & Y turret), the latter pair separated by the torpedo control tower located on a dwarf tripod mast. Two further (wing) turrets (P & Q turrets) were located either side of the bridge superstructure, each able to fire only towards its side. Arrangement of all the turrets along the ship's centreline was rejected in order to minimise the risk of blast damage to the closely-packed turrets, although this precaution was later found to be unnecessary. Dreadnought could deliver a broadside of eight guns, and fire eight guns abaft or six ahead, in each case only in a narrow range of angles; she could never fire all her ten 12-inch (30 cm) guns at one target. At the time of her design end-on fire was regarded, at the instigation of Jackie Fisher, as being of paramount importance over and above broadside fire. This design concept originated in the earlier battlecruiser classes and was perpetuated in the succeeding classes.

Later British battleships, starting with the Superdreadnoughts of the Orion class, used a "superimposed" (or "superfiring") arrangement, with turrets arrayed in a stair-step arrangement on the centreline. Additional light guns were included for close-in defence but were not intended as offensive weapons.

Twin BL 12 inch Mk X guns

The vessels which Dreadnought was expected to engage could only bring to bear four guns of similar size, plus shorter-range guns; Dreadnought would endeavour to engage within the range of her guns, but stay out of the range of smaller guns, giving her far more effective firepower than earlier battleships.

The use of a uniform main battery greatly simplified the task of adjusting fire in action. As all guns had the same ballistic characteristics, the shells fell in a cluster whose size was determined by random variations and whose centre was subject to errors in aiming and other deterministic effects such as wind. If the shells were seen to splash beyond the target, the range was shortened, and viceversa; if the target was bracketed, the next volley used the same settings, adjusted for ship speeds and course changes. For a given powder load, range adjustments were made by small adjustments to elevation. This simplicity was not available when the guns were of different types and observers did not know which guns created which splashes.

Dreadnought was one of the first vessels of the Royal Navy to be fitted with instruments for electronically transmitting range, order and deflection information to the turrets, removing the reliance on voice-pipes which had been shown to be ineffective in combat.[4] The fire-control equipment, consisting of the transmitting equipment and Vickers range clocks (a variable speed clock that predicted the changing range between two vessels), were located in the Transmitting Station (T/S in navy parlance) in the heart of the ship for protection. [5]

The transmitting station was connected to the spotting top by a large-diameter armoured voice-pipe where a dumaresq, a rate of change device, was placed with a rangefinder - the initial range, spotting corrections and deflection being called down to the transmitting station. After she returned from her shakedown cruise Dreadnought was fitted with electrical means of transmitting information from the spotting top to the transmitting station. Her rangefinders by Barr and Stroud were of a new type, having a 9-foot (3 m) base length as opposed to the standard 4½-foot base on almost every other naval vessel. This allowed for greater accuracy of determining the range at distance.

The director, a device invented by Admiral Percy Scott in conjunction with the armament firm of Vickers for transmitting the range and deflection to all turrets and then firing them simultaneously, was first installed on Dreadnought in 1909 but removed before being tested. It was not until the First World War that she would be fitted with the device again.

Another major innovation was the elimination of longitudinal passageways between compartments below the main deck level. While doors connecting compartments were always closed during combat, connected compartments had been found to be a cause of weakness following a collision during fleet exercises which resulted in the sinking of a battlecruiser.

Sailing ships were controlled from the aft part of the ship, and officers were customarily housed aft. Steam ships were controlled from the bridge, high and in the first quarter or third of the ship. Dreadnought reversed the old arrangement, housing officers in the forward part of the ship and enlisted men aft, so that both officers, and stokers and enginemen, were closer to their action stations.

Construction and early years

3-view drawing of HMS Dreadnought in 1911, with QF 12 pdr guns added

So convinced was Fisher that construction of the design would be ordered, that he started stockpiling steel for use on the ship before a construction slip was even available. This proved a fortunate decision, as during the stockpiling phase a new hull shape was identified that would decrease drag. Fisher, happy with the original 21-knot (39 km/h) speed, used the reduced drag to increase the weight of armour rather than increasing the speed. The final design mounted 11 inches (279 mm) of armour on the sides and turrets, about 3 inches (76 mm) more than designs from only a year earlier. Construction finally started in October 1905, and Dreadnought was launched by King Edward VII on 10 February 1906, after only four months on the ways. She went to sea on 3 October 1906, only a year and a day after construction started. The process had been sped up by using turrets originally designed for the Lord Nelson-class battleships which preceded her. The speed of Dreadnought's construction was almost as alarming to foreign navies as her technical capabilities.

Dreadnought was commissioned for trials in December 1906, and in January 1907 she sailed for the Mediterranean Sea and then to Port of Spain, Trinidad. Her engines and guns were given a thorough workout by Captain Sir Reginald Bacon. His report stated, "No member of the Committee on Designs dared to hope that all the innovations introduced would have turned out as successfully as had been the case." On her return to Portsmouth Dreadnought became flagship of the Home Fleet between 1907 and 1912. As such she spent most of her time in home waters, with occasional cruises to Spain and the Mediterranean.

View from the bridge during naval review

Her building, trials and early service were closely watched by the world's naval authorities. Her design so thoroughly eclipsed earlier types that subsequent battleships of all nations were generically known as "dreadnoughts" and previous ones disparaged as "pre-dreadnoughts". Her time of outright superiority was short, however. Dreadnought had originally been built to show other navies the futility of attempting to go toe-to-toe with the Royal Navy, but as in the past (see HMS Warrior for instance), the Navy underestimated the German fleet's desire to maintain parity. Her construction sparked off another naval arms race, and soon all major fleets were adding Dreadnought-like ships.[6] Whereas before the commissioning of Dreadnought, Britain had possessed a lead of over 25 first-class battleships, she now possessed a lead of only one.

Dreadnought was quickly followed by nine more almost identical ships. In the Bellerophon class several detailed improvements in design were introduced, notably a heavier secondary battery. Then came the St. Vincent, the Neptune and the Colossus classes; Neptune, Colossus and Hercules had staggered (rather than symmetrical) wing turrets as well as a superfiring turret aft to gain an additional two guns in the broadside for parity with the new American Florida-class dreadnoughts, which mounted all their turrets on the centreline. The contemporary German Kaiser class and her predecessors all had wing turrets and a consequent broadside of 8 guns.

Career

HMS Dreadnought in dry dock

From 1907–1912 Dreadnought served as flagship of the Royal Navy's Home Fleet. In 1910 she attracted the attention of notorious hoaxer Horace de Vere Cole, who persuaded the Royal Navy to arrange for a party of Abyssinian royals to be given a tour of a ship. In reality, the "Abyssinian royals" were some of Cole's friends in blackface and disguise, including a young Virginia Woolf and her Bloomsbury Group friends; it became known as the Dreadnought hoax. Cole had picked Dreadnought because she was at that time the most prominent and visible symbol of Britain's naval might.

In 1910, HMS Orion, the first of the 13.5-inch (343 mm) gunned "super-dreadnoughts", was laid down. These ships had much greater fighting power than the 12-inch (305 mm) gunned Dreadnought and her immediate successors, and gradually supplanted them in both military significance and prestige. The "super-dreadnoughts" had the same design speed as the older dreadnoughts (21 knots),[7] and the older ships therefore had no difficulty maintaining station with them.

Compared to later battleships, Dreadnought was ill-defended against torpedo attacks. Her anti-destroyer armament consisted of 12-pounder (76 mm) guns; the arrangement of these was the subject of experiment during her trials, resulting in a final arrangement of 14 guns distributed about her superstructure, and another 10 mounted in pairs on the roofs of the main turrets.[8] Even in 1906, this gun was considered too light to be wholly effective against the newest classes of destroyer, and all subsequent British dreadnoughts had secondary batteries of 4-inch (10.2 cm) calibre or larger. In common with all major warships of her day, Dreadnought was fitted with anti-torpedo nets, but these were removed early in the war, since they caused considerable loss of speed and were easily defeated by torpedoes fitted with net-cutters.[9]

At the outbreak of World War I in 1914 she was flagship of the Fourth Battle Squadron in the North Sea, based at Scapa Flow. Ironically for a vessel designed to engage enemy battleships, her only significant action was the ramming and sinking of German submarine U-29 skippered by Otto Weddigen on 18 March 1915 – Dreadnought thus became the only battleship ever to sink a submarine directly.[10]. She was refitted early in 1916,[8] and from May 1916 served as flagship of the Third Battle Squadron, based at Sheerness on the Thames, part of a force intended to counter the threat of shore bombardment by German battlecruisers. As a result, she missed the Battle of Jutland, the Royal Navy's most significant fleet engagement of the war. She returned to the Grand Fleet in March 1918, resuming her role as flagship of the Fourth Battle Squadron, but was paid off in July.[8] Like most of the older battleships, she was in bad condition from constant patrols in the North Sea, and was put in reserve at Rosyth in February 1919. Dreadnought was put up for sale on 31 March 1920 and sold for scrap to T.W. Ward & Company on 9 May 1921 for the sum of £44,000. She was broken up at Ward's new premises at Inverkeithing, Scotland, upon arrival on 2 January 1923.

Significance

When Britain commissioned its first nuclear submarine, in recognition of how things changed with her in service, she was named Dreadnought.

On the anniversary of her launch in 2006, a temporary exhibition on her was opened at the Royal Naval Museum, Portsmouth.

See also

Notes

  1. ↑ Hacker (2005) p. 256–257
  2. ↑ 2.0 2.1 Gardner (1985) p. 21
  3. ↑ For an example, see Hough (1975) p. 22
  4. ↑ During the Russo-Japanese War, gunfire had either shot away voice-pipes or had made the hearing of orders impossible.
  5. ↑ Brooks (2005) p. 44
  6. ↑ Nevertheless, from 1906 to 1919 Britain built 48 dreadnought battleships and battlecruisers (as well as 3 "large light cruisers" and 18 big gun monitors); Germany 29; and the United States 24.
  7. ↑ Gardner (1985) p. 28–32; The Queen Elizabeths of 1913 were much faster (25 knots designed), but were intended to operate as a "Fast Division", semi-independent of the line of battle proper
  8. ↑ 8.0 8.1 8.2 Gardner (1985) p. 22
  9. ↑ Archibald (1984) p. 160
  10. ↑ A spotter plane from the battleship Warspite sank the U-64 during the Second Battle of Narvik on 13 April 1940.

References

External links

Dreadnought class battleship
Dreadnought
Preceded by:Lord Nelson class · Followed by:Bellerophon class
List of battleships of the Royal Navy