Courbet-class battleship

From Wikipedia, the free encyclopedia
  (Redirected from Courbet class battleship)
Jump to: navigation, search
Jean Bart (1911).jpg
Jean Bart in 1914
Class overview
Name: Courbet class
Operators:  French Navy
Free France Free French Navy
Preceded by: Danton-class
Succeeded by: Bretagne-class
Built: 1910–1914
In service: 1913–1945
Completed: 4
Lost: 1
Scrapped: 3
General characteristics
Type: Dreadnought battleship
Displacement: 23,475 tonnes (23,104 long tons) (standard)
25,579 tonnes (25,175 long tons) (full load)
Length: 166 m (544 ft 7 in)
Beam: 27 m (88 ft 7 in)
Draught: 9.04 m (29 ft 8 in) at normal load
Installed power: 28,000 ihp (21,000 kW)
Propulsion: 4-shaft Parsons steam turbines
24 boilers
Speed: 21 knots (39 km/h; 24 mph) (trials)
Endurance: 4,200 nmi (7,780 km; 4,830 mi) at 10 knots (19 km/h; 12 mph)
Complement: 1,115–1,187
Armament:

6 × 2 - 305 mm Mle 1910 guns
22 × 1 - 138 mm Mle 1910 guns
4 × 1 - 47 mm (1.9 in) guns

4 × 450 mm (17.7 in) torpedo tubes
Armour:

Belt: 180–270 mm (7.1–10.6 in)
Deck: 30–70 mm (1.2–2.8 in)
Conning Tower: 300 mm (11.8 in)
Turrets: 250–290 mm (9.8–11.4 in)

Barbettes: 280 mm (11.0 in)

The Courbet class battleships were the first dreadnoughts built for the French Navy before World War I. The class comprised four ships: Courbet, France, Jean Bart, and Paris. All four ships were deployed to the Mediterranean Sea for the entirety of World War I, spending most of their time escorting French troop convoys from North Africa and covering the Otranto Barrage. An Anglo-French fleet led by Courbet succeeded in sinking the Austro-Hungarian protected cruiser Zenta in the Battle of Antivari. Jean Bart was torpedoed in the bow by U-12 on 21 December 1914, but she was able to steam to Malta for repairs.

France sank after striking a rock in Quiberon Bay in 1922. Between the wars the surviving ships were modernised several times, but they were not rebuilt thoroughly enough to prevent them from becoming obsolete in comparison to modern German or Italian battleships. They were relegated to training duties during the 1930s. Courbet and Paris escaped to Portsmouth where they became depot and accommodation ships after the French armistice in 1940. Jean Bart was demilitarised, renamed Océan, and became a school hulk in Toulon. She was captured there on 27 November 1942, although she was not scuttled. She was used for experiments with large shaped charge warheads by the Germans until she was sunk by the Allies in 1944, later broken up in place in 1945. Courbet was scuttled on 9 June 1944 as a breakwater for the Mulberry harbour used during the Battle of Normandy.

Design[edit]

Concerned about underwater hits, the class's French designers decided to extend the waterline armour belt well below the waterline as compared to their contemporaries. The main armour was also thinner than that of its British or German counterparts, but covered more area. Their secondary armament was of a smaller size than the 15 cm (5.9 in) guns used by the Germans or the British 6-inch (152 mm) guns, but the French placed a premium on rate of fire rather than size, in order stop torpedo boats before they got within torpedo range.[1]

General characteristics[edit]

The Courbets were longer than their predecessors, at 166 m (544 ft 7 in) overall. The ships had a beam of 27 m (88 ft 7 in) and at full load a draft of 9.04 m (29 ft 8 in) at the bow. The ships were significantly heavier than the previous Danton class; the Courbet-class ships displaced 23,475 tonnes (23,104 long tons) at standard load and 25,579 tonnes (25,175 long tons) at full load, over 5,000 tonnes (4,900 long tons) more than the earlier ships.[2][Note 1]

These ships proved to be rather wet in service, as they were bow-heavy because of the superimposed turrets forward.[1]

Propulsion[edit]

The Courbet-class ships had four Parsons direct-drive steam turbines which were rated at 28,000 shp (21,000 kW). Each ship had twenty-four Belleville water-tube or Niclausse boilers, eight small and sixteen large. The large boilers were in the two forward boiler rooms and the small boilers were in the rear boiler room; each boiler room housed eight boilers. These boilers were coal-burning with auxiliary oil sprayers.[3] They had a top speed of 21 knots (39 km/h; 24 mph),[2] although all four were faster during trials. The ships carried up to 2,700 long tons (2,743 t) of coal and 906 long tons (921 t) of oil. They could steam for 4,200 nautical miles (7,800 km; 4,800 mi) at a speed of 10 knots (19 km/h; 12 mph).[1]

Armament[edit]

The French rejected their standard hexagonal configuration for the main armament of the Courbet class. Twelve 305 mm Mle 1910 45-calibre guns were mounted in six twin gun turrets, with two turrets superimposed fore and aft, and one on each flank of the ship. The guns had a maximum elevation of only 12°.[4] They fired 432-kilogram (952 lb) armour-piercing projectiles at a muzzle velocity of 783 m/s (2,570 ft/s) at a rate of 1.5–2 rounds per minute.[5] At maximum elevation, this provided a maximum range of only 13,500 m (14,800 yd). The guns were provided with 100 shells each.[1]

Right elevation and deck plan as depicted in Brassey's Naval Annual 1912

The ships' secondary armament consisted of twenty-two 138 mm Mle 1910 guns, mounted in casemates. The guns fired 39.5-kilogram (87 lb) semi-armour-piercing shells at a muzzle velocity of 840 m/s (2,800 ft/s). The guns could be elevated to 15°, which provided a maximum range of less than 16,000 metres (17,000 yd). They had a rate of fire of 5–6 rounds per minute[6] and each gun provided with 275 rounds.[1] The rearmost guns were very low and were often washed out in any kind of sea. The ships also carried four 47 mm (1.9 in) Modèle 1902 Hotchkiss guns, two on each beam. The Courbet class ships were also armed with four 450 mm (18 in) submerged Modèle 1909 torpedo tubes for which they carried twelve torpedoes.[3]

Fire control arrangements were very primitive and the Courbets were only provided with one 2.74 m (9 ft 0 in) rangefinder on each side of the conning tower. Each turret had 1.37 m (4 ft 6 in) rangefinder under an armoured hood at the rear of the turret.[7]

Armour[edit]

The Courbet-class ships had a waterline armoured belt, 4.75 m (15.6 ft) deep, that was 270 mm (11 in) thick between the fore and aft turrets and tapered to 180 mm (7.1 in) towards the bow and stern. It extended 2.4 m (7 ft 10 in) below the normal waterline. Above the main belt was another belt, 180 mm thick, that covered the sides, and the secondary armament, up to the forecastle deck, 4.5 m (15 ft) deep, between the fore and aft turrets. The vertical armour was backed by 80 mm (3.1 in) of wood. Four of the ship's decks were armoured, between 30 and 48 mm (1.2 and 1.9 in) each, although they were built up from two or more layers of plates. The sides of the lowest armoured deck curved to meet the bottom of the lower edge of the waterline belt armour and increased to a thickness of 70 mm (2.8 in). The conning tower had armour 300 mm (11.8 in) thick. The main gun turrets had 290 mm (11.4 in) of armour on their faces, 250 mm (9.8 in) on their sides and roofs 100 mm (3.9 in) thick. Their barbettes had 280 mm (11.0 in) of armour. There was no anti-torpedo bulkhead although there was a longitudinal bulkhead abreast the machinery spaces that was used either as a coal bunker or left as a void.[8]

Construction[edit]

Ship Builder Laid down Launched Commissioned Fate
Courbet Arsenal de Lorient, Lorient 1 September 1910 23 September 1911 19 November 1913 Scuttled 9 June 1944 as a breakwater for the Mulberry harbour, Normandy
France AC de la Loire, Saint-Nazaire 30 November 1911 7 November 1912 15 July 1914 Foundered 26 August 1922 after hitting a rock in Quiberon Bay
Jean Bart Arsenal de Brest, Brest 15 November 1910 22 September 1911 5 June 1913 Scrapped in situ 14 December 1945
Paris FC de la Mediterranee, La Seyne-sur-Mer 10 November 1911 28 September 1912 1 August 1914 Decommissioned 1945, sold for scrapping 21 December 1955

Career[edit]

Early service[edit]

The Courbet-class ships were completed less than a year before the start of World War I and nothing is known of their activities during this time except that France, escorted by Jean Bart, carried the President of the French Republic, Raymond Poincaré, on a state visit to Saint Petersburg, Russia in July 1914.[9] They were returning from Russia when World War I began, but made it to France without encountering German ships.

World War I[edit]

France and the British agreed that the French fleet would concentrate in the Mediterranean to contain the Austro-Hungarian fleet and the Courbet class ships sailed there after the war began. Courbet became the flagship of Admiral Augustin Boué de Lapeyrère, commander of the French Mediterranean Fleet. Lapeyrère decided immediately on a sweep into the Adriatic to surprise the Austrian vessels enforcing a blockade of Montenegro. The Anglo-French force, which included Jean Bart, succeeded in cutting off and sinking the Austro-Hungarian protected cruiser Zenta off Bar on 16 August 1914, although her accompanying destroyer managed to escape.[10] They spent most of the rest of 1914 providing gunfire support for the Montenegrin Army until U-12 hit Jean Bart on 21 December with one torpedo in the wine store just in front of the forward magazine off Sazan Island.[1] She was able to steam to Malta on her own for repairs that required three and a half months, but this forced the battleships to fall back to either Malta or Bizerte. After the French occupied the neutral Greek island of Corfu in 1916 they moved forward to Corfu and Argostoli, but their activities were very limited as many of their crews were used to man anti-submarine ships.[11]

Post-war modernisation[edit]

A post-war assessment listed their weaknesses as:

  • No director control for the guns
  • The elevation of the main guns was insufficient
  • Protection against torpedoes was weak
  • The horizontal protection against plunging fire was weak
  • The anti-aircraft defense was negligible
  • They were coal-fired
  • The organisation of the crew, the lighting and the method of transmitting orders were old-fashioned.[7]

The survivors were refitted several times during the interwar period to remedy these issues, although no comprehensive modernisation was ever planned. These included installation of director control mounted in new tripod foremasts, replacement of the rangefinders by larger units, the addition of more rangefinders, the alteration of the main gun turrets to allow elevation up to 23°, partial replacement of the coal-fired boilers by oil-fired units, the replacement of the direct-drive turbines by geared turbines, the removal of the bow armour to reduce the weight forward, and the addition of more modern anti-aircraft guns.[12]

Inter-war careers[edit]

France in harbor

In April 1919, while helping to defend Sevastopol from the advancing Bolsheviks, the crews of France and Jean Bart mutinied, but collapsed when Vice-Admiral Jean-Françoise-Charles Amet agreed to meet their main demand to take the ships home. 26 crewmen on France and three on Jean Bart were sentenced to prison terms upon her return, although they were commuted in 1922 as part of a bargain between Prime Minister Raymond Poincaré and the parties of the Left.[13]

In 1922, France was wrecked after striking an uncharted rock in Quiberon Bay at low tide and foundered with three deaths among her crew. Jean Bart received the first stage of her modernisation between 12 October 1923 and 29 January 1925. She underwent the second stage between 7 August 1929 and 28 September 1931. Her condition was poor, even after the earlier refits so she was demilitarised and became a training ship in Toulon in 1936. She was renamed Océan in 1937 to release her name for the new Richelieu-class battleship Jean Bart.[14]

Courbet became flagship of Vice-Amiral Charlier between 6 June 1919 and 20 October 1920. The following year she became a gunnery training ship at Toulon, but she suffered a serious boiler fire in June 1923 that caused her to be repaired and given the first of her upgrades between July and April 1924 at La Seyne-sur-Mer. She had another boiler fire in August 1924 and remained under repair for the rest of the year, but resumed her duties as a gunnery training ship upon her return from the dockyard. She was refitted again between January 1927 and January 1931. She was transferred from the gunnery school to the navigation school in 1937, before her final prewar refit between April 1937 to September 1938. By 1939 she reverted to her role as a gunnery training ship, but she was ordered to Brest and Quiberon with her sister Paris upon the outbreak of World War II.[15]

Paris was sent to Pula on 12 December 1918 to supervise the surrendered Austro-Hungarian fleet where she remained until 25 March 1919. She provided cover for Greek troops during the Occupation of İzmir (Smyrna) from May 1919 before returning to Toulon on 30 June. She received the first of her upgrades at Brest between October 1922 and November 1923. She supported an amphibious landing at Al Hoceima by Spanish troops during the summer of 1925 after the Riffians attacked French Morocco during the Rif War. She destroyed coast defense batteries there despite taking light damage from six hits and remained there until October as the flagship of the French forces. She received the second of her upgrades from 16 August 1927 to 15 January 1929 at Toulon. She resumed her role as flagship of the 2nd Division of the 1st Squadron of the Mediterranean Squadron until 1 October 1931 when she became a training ship.[15]

World War II[edit]

Courbet and Paris formed a Fifth Squadron at the beginning of the war. They were transferred to the Atlantic to continue their training duties without interference. Both ships were ordered restored to operational status on 21 May 1940 by Amiral Mord and their light anti-aircraft outfits were augmented at Cherbourg. Courbet was ordered to provide gunfire support to the defenders of Cherbourg against the advancing 7th Panzer Division and covered the evacuation of the town by the Allies while Paris supported the defenders of Le Havre. Lack of spotting aircraft meant that neither ship was particularly effective in that role.[16]

Paris was damaged by a German bomb on 11 June and sailed for Cherbourg for emergency repairs that night. She was later transferred to Brest on 14 June and evacuated 2800 men when she sailed for Plymouth on 18 June at a speed of 7 knots (13 km/h; 8.1 mph). She was seized there on 3 July by the Royal Navy as part of Operation Catapult, Winston Churchill's plan to prevent the French Navy from falling into German hands. She was used as a depot ship for the rest of the war and temporarily as a barracks ship by the Polish Navy. She was returned to French control in July 1945 and towed to Brest on 21 August. She continued to serve as a depot ship until she was stricken for breaking up on 21 December 1955 before being scrapped the following year.[17]

Courbet sailed for Portsmouth on 20 June. She was also seized there on 3 July and was turned over to the Free French a week later who used her as a depot and an anti-aircraft ship in Portsmouth until 31 March 1941 when she was disarmed. She remained in use as a depot ship and target until she was scuttled as a breakwater on 9 July 1944 for the Mulberry harbour used during the Battle of Normandy. She was scrapped in place after the war.[11]

Jean Bart was demilitarised and became a school hulk in Toulon in 1936. She remained there during World War II and was captured there on 27 November 1942, although she was not scuttled. She was used for experiments with large shaped charge warheads by the Germans until she was sunk by the Allies in 1944[3] before being broken up in place beginning on 14 December 1945.[18]

Notes[edit]

  1. ^ The Danton class battleships displaced 18,318 tons at the designed weight, and 19,763 tons at full load. See: Conway's, p. 196

Footnotes[edit]

  1. ^ a b c d e f Conway's p. 197
  2. ^ a b Dumas, p. 223
  3. ^ a b c Whitley, p. 36
  4. ^ Dumas, p. 224
  5. ^ "French 305 mm/45 (12") Model 1906 and Model 1906-1910". 23 May 2006. Retrieved 21 November 2009. 
  6. ^ "French 138.6 mm/55 (5.46") Model 1910". 16 May 2006. Retrieved 21 November 2009. 
  7. ^ a b Dumas, p. 225
  8. ^ Whitley, p. 35
  9. ^ Scheer, Reinhard. "Germany's High Seas Fleet in the World War". Retrieved 21 November 2009. 
  10. ^ Sieche, Erwin. "French Naval Operations, Engagements and Ship Losses in the Adriatic in World War One". Retrieved 22 November 2009. 
  11. ^ a b Whitley, p. 38
  12. ^ Whitely, p. 36
  13. ^ Masson, Philippe (2003). "The French Naval Mutinies, 1919". In Bell, Christopher M. and Elleman, Bruce A. Naval Mutinies of the Twentieth Century: An International Perspective. Cass Series: Naval Policy and History 19. London: Frank Cass. pp. 106–122. ISBN 0-7146-5456-6. 
  14. ^ Dumas, p. 229
  15. ^ a b Whitley, pp. 36, 38
  16. ^ Whitley, pp. 38–39
  17. ^ Whitley, p. 39
  18. ^ Dumas, p. 231

Bibliography[edit]

  • Dumas, Robert (1985). "The French Dreadnoughts: The 23,500 ton Courbet Class". In John Roberts. Warship IX. Annapolis, Maryland: Naval Institute Press. pp. 154–164, 223–231. ISBN 0-87021-984-7. OCLC 26058427. 
  • Dumas, Robert; Guiglini, Jean (1980). Les cuirassés français de 23,500 tonnes. Grenoble, France: Editions de 4 Seigneurs. OCLC 7836734. 
  • Gardiner, Robert; Chesneau, Roger, eds. (1980). Conway's All the World's Fighting Ships, 1922–1946. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-913-8. 
  • Gardiner, Robert; Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships: 1906–1922. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-907-3. 
  • Jordan, John; Dumas, Robert (2009). French Battleships 1922–1956. Annapolis, Maryland: Naval Institute Press. ISBN 978-1-59114-416-8. 
  • Whitley, M. J. (1998). Battleships of World War II. Annapolis, Maryland: Naval Institute Press. ISBN 1-55750-184-X. 

External links[edit]