Richelieu-class battleship
 Richelieu in September 1943, after refit, with the upper fire-control system on the fore tower removed, and many AA short-range guns added |
|
| Class overview | |
|---|---|
| Name: | Richelieu-class battleship |
| Builders: | Brest Navy Yard (Richelieu and Clemenceau) and Penhoët shipbuilding yards (Jean Bart) |
| Operators: | French Navy |
| Preceded by: | Dunkerque class |
| Succeeded by: | Alsace class (planned) |
| Subclasses: | Gascogne |
| Built: | 1935–1955 |
| In service: | 1940–1967 |
| Planned: | 4 |
| Completed: | 2 (Richelieu and Jean Bart) |
| Cancelled: | 1 |
| Laid up: | 3 |
| General characteristics | |
| Type: | Battleship |
| Displacement: | 35,000 tons standard[a] as designed 48,950 tonnes (48,180 long tons) full load (Jean Bart post war[2]) |
| Length: | 247.85 m (813.2 ft) |
| Beam: | 33 m (108 ft) |
| Draft: | 9.63 m (31.6 ft) |
| Installed power: | 112 MW (150,000 hp) steam using fuel oil |
| Propulsion: | 6 Indret Sural (pressure-fired) boilers 4 Parsons geared turbines 4 4-bladed propellers |
| Speed: | 30 knots (56 km/h; 35 mph) |
| Range: | 9,850 nautical miles (18,240 km; 11,340 mi) at 16 knots (30 km/h; 18 mph) 3,450 nautical miles (6,390 km; 3,970 mi) at 30 knots (56 km/h; 35 mph) |
| Complement: | 1,464 + 86 as flagship (planned) 911 men in 1950 (incomplete) 1,280 men during the Suez affair. |
| Armament: | 8 × 380 mm (15.0 in)/45 Modèle 1935 guns in quadruple turrets at the bow 9 × 152 mm (6.0 in) in 3 triple DP Modèle 1936 turrets Richelieu in 1940–1942: 12 × 100 mm (3.94 in) in 6 CAD Modèle 1931 mountings 16 × 37 mm (1.5 in) in 8 CAD Modèle 1933 mountings 28 × 13.2 mm (0.52 in) Hotchkiss (5 CAQ, 2 CAD, 4 CAS) Modèle 1929 Richelieu in 1943: 12 × 100 mm (3.94 in) in 6 CAD Modèle 1931 mountings 56 × 40 mm (1.6 in) in 14 CAQ Bofors mountings 50 × 20 mm (0.79 in) CAS Oerlikon mountings Jean Bart in 1955: 24 × 100 mm (3.94 in) in 12 CAD Modèle 1946 28 × 57 mm (2.2 in) in 14 ACAD Bofors Modèle 1948 |
| Armor: | Belt: 330 mm (13.0 in) Upper armored deck: 150–170 mm (5.9–6.7 in) Lower armored deck: 40 mm (1.6 in) Main turrets: 170–430 mm (6.7–17 in) Conning tower: 340 mm (13.4 in) |
| Aircraft carried: | 4/5 seaplanes planned 3 installed on Richelieu in 1941-42 |
| Aviation facilities: | Aircraft hangar, crane, and 2 catapults before 1943 |
Four Richelieu-class ships, of three different subclasses, were designed over the course of three naval construction programs, in 1935, 1936, and 1938; only three were laid down. Only the first two units, the Richelieu and the Jean Bart, were ever completed. They saw service during World War II, first under Vichy control in Dakar (1940) and Casablanca (1942), then under the Allies' control, the Richelieu participating in British Home Fleet and Eastern Fleet operations and supporting the French forces' return to Indochina in late 1945. The Jean Bart was not completed until the 1950s, and took part in the operations off Port Said (Egypt) during the Suez Crisis in 1956. The Richelieu was scrapped in 1968 and the Jean Bart in 1970.
Contents
- 1 Background
- 1.1 Washington Naval Treaty: Consequences
- 1.2 French battleship projects: 1926–1929
- 1.3 Responding to the German pocket battleships
- 1.3.1 The 23,000-tonne battleship
- 1.3.2 Dunkerque
- 1.4 Facing the Scharnhorst and Littorio
- 2 Design
- 2.1 Richelieu and Jean Bart
- 2.1.1 Armament
- 2.1.1.1 Main artillery
- 2.1.1.2 Secondary artillery
- 2.1.1.3 Anti-aircraft light artillery
- 2.1.1.4 Fire control systems
- 2.1.1.5 Aircraft installations
- 2.1.2 Protection
- 2.1.2.1 Armor
- 2.1.2.2 Underwater protection
- 2.1.3 Propulsion
- 2.1.1 Armament
- 2.2 1938 Supplementary Program Battleships
- 2.2.1 Clemenceau
- 2.2.2 Gascogne
- 2.1 Richelieu and Jean Bart
- 3 History
- 3.1 Richelieu
- 3.1.1 Dakar, under Vichy's orders
- 3.1.2 On the Allies' side
- 3.1.3 Post war
- 3.2 Jean Bart
- 3.2.1 From Saint-Nazaire to Casablanca
- 3.2.2 Completion
- 3.2.3 Career
- 3.3 Clemenceau and Gascogne
- 3.1 Richelieu
- 4 Notes
- 5 References
- 6 Bibliography
Background
In 1922, the Washington Naval Conference, concluded by the Washington Naval Treaty, decided to stop for ten years any new battleship building, as a new naval armaments race was developing between the United States of America, the United Kingdom, and Japan. The Treaty fixed limits for new battleships of 35,000-long-ton (35,562 t) standard displacement, and 406 mm (16.0 in) for the main battery's artillery caliber. France and Italy each were also allowed (after 1927) to replace two of their old battleships.[3]
Germany was not subject to the Washington Treaty limitations, but instead to the more stringent Treaty of Versailles restrictions. It was forbidden to build any warship with a displacement greater than 10,000 long tons (10,160 t).[4]
But the practicality of building battleships seemed very questionable as, during World War I, no decisive victory had resulted from a cataclysmic clash between battleships, unlike the Japanese victory of Tsushima more than 17 years earlier.[5][6] However, the war experience had clearly shown the problem of ensuring the safety of maritime commercial routes against commerce raiders, for which cruisers appeared better suited than battleships; thus, by the late 1920s all the countries which had signed the Washington Treaty undertook the building of new heavy cruiser classes.[7] For France, the priority was the safety of the waterborne connections between France and her African colonies/protectorates (via the Marseille-Algiers and Bordeaux-Casablanca-Dakar routes).[8]
Thus, in the late 1920s, the most powerful battleships had been designed before the Washington Treaty, and were armed with four double turrets of 15-inch (381 mm)[b] or 16-inch (406 mm)[c] caliber guns. The Nelson-class battleships, built between 1922–1927 with three triple 16-inch turrets forward, were based on the 1921 G3 battlecruiser concept.[14] The top speed was, for most battleships, 21–25 knots (39–46 km/h)[d]; the Nagato-class battleships had 26.5 knots (49.1 km/h; 30.5 mph) top speeds;[16] and a few in Western waters, the fast battleships or battlecruisers, had top speeds exceeding 30 knots (56 km/h; 35 mph)[e].
But neither France nor Italy were intending to build battleships similar to the most recent American, British, or Japanese battleships: very heavily armed and armored. They only wished to modernize their aging battleships, refurbishing the propulsion machinery and upgrading the main artillery; the Treaty of Washington authorized them to undertake much more radical modernizations than the other treaty powers. In the same way, both powers reserved the right to employ their replacement capital ship tonnage allocation (70,000-long-ton (71,123 t)) as they saw fit, subject to Treaty limits: not only were two battleships of 35,000-long-ton (35,562 t) possible, but also three of 23,000-long-ton (23,369 t) or four of 17,500-long-ton (17,781 t).[18]
French battleship projects: 1926–1929
The French Admiralty, under Vice Admiral Salaün, discussed in 1926–1927 ships designed as cruiser killers; these would be able to outgun and outrun the Italian heavy cruisers, which were considered the main threat against the waterborne connections between France and North Africa.[21] The first Italian heavy cruiser unit built, the Trento, had been laid down in 1925 and launched in 1926. The French designers considered a displacement of 17,500-long-ton (17,781 t) which would have allowed them to build four units under the maximum limit of 70,000-long-ton (71,123 t) (from the Treaty of Washington) for the authorized French replacements. An artillery arrangement of two 305-millimetre (12.0 in) 55-calibre quadruple turrets forward was examined, [22] combining the choice of quadruple turrets made by the French designers of the prewar Normandie class[23] and the all forward arrangement of the Nelson-class battleships.[24] The top speed would have been 34–35 knots (63–65 km/h), the armor able to resist 203-millimetre (8.0 in) shells. Ultimately, however, it was concluded that such warships would not have been able to fight in the line of battle against the old Italian battleships.[25][26]
In 1927, studies were undertaken of 37,000-tonne (36,416-long-ton) battlecruisers. This trial displacement would have been the equivalent of a standard Washington-Treaty displacement of 32,000–33,000-long-ton (32,514–33,530 t), near the maximum limit for battleship displacement fixed by the Treaty of Washington. However, it was clear that the building of 35,000-long-ton (35,562 t) battleships would surpass the French Navy's technical and financial capacities at the time: the building costs of the required infrastructure[f] for hulls of about 230–250 metres (750–820 ft) length, allowing them to reach a speed of 27–30 knots (50–56 km/h), would have been enough to buy two more battleships, and would have jeopardized the building program for the other categorizes of warships (cruisers, destroyers, and submarines).[27]
Moreover, at the same time, discussions at the Disarmament Subcommittee of the League of Nations had begun in Geneva, about the pursuit of naval armaments limitation policy. The United Kingdom was trying to obtain more drastic limitations than the Washington Treaty's, with a battleship maximum displacement of 25,000-long-ton (25,401 t) and a battleship maximum caliber of 305 mm (12.0 in), and the French government did not wanted to jeopardize the negotiations.[28]
Responding to the German pocket battleships
The 23,000-tonne battleship
In February 1929, everything changed when the German Reichsmarine laid down the keel of the first Deutschland-class cruiser, an armored ship (in German, Panzerschiff). They claimed it displaced 10,000 long tons (10,200 t), following the Treaty of Versailles restrictions; it was actually at least 25% bigger, but this was not known at the time. With two 280 mm (11 in) triple turrets and a top speed of 26 knots (48 km/h; 30 mph), this ship outgunned every so-called heavy cruiser with their 203-millimetre (8.0 in) guns intended to respect the Washington Treaty limitations concerning the caliber of cruiser main artillery and outran every battleship except the three fastest British units (the HMS Hood, HMS Renown, and HMS Repulse).[29] The Deutschland's type was commonly designated as a pocket battleship, being actually – as her German denomination well-indicated – an armored cruiser.[30]The French Admiralty's reaction was to prepare a draft design for a ship which would outclass the German "pocket battleship" in armament, armor, and speed. It appeared that the previous French proposals' armament might be retained and that the speed might be no more than 30 knots (56 km/h; 35 mph), but the most important feature was that the armor had to be thicker to resist 280-millimetre (11 in) shells. These considerations lead to a planned displacement of about 23,000–25,000-tonne (22,637–24,605 long tons), which fit the maximum displacement that the United Kingdom proposed in the naval armament limitations negotiations.[31]
The 1930 London Naval Treaty established that the ten-year battleship-building holiday agreed at Washington would be extended for a further five years, until 31 December 1936. France and Italy were, however, authorized to build the replacement tonnage that the Washington Naval Treaty entitled them to lay down. Nevertheless, France and Italy refused to adhere to any qualitative limitations, which were mainly concerning the maximum displacement of cruisers.[32], as France argued that construction had just started in Germany of the armor-clad Deutschland, and following the new limits' rejection by France, Italy was no longer prepared to accept new restrictions concerning battleships.[33][34]
In order to establish a ceiling for new naval construction, bilateral talks took place between France and Italy, with significant encouragement from the United Kingdom; these talks began at the start of 1931, and a basis of agreement was concluded on 1 March 1931. Until 1936, both countries would be allowed to build only two battleships, each of 23,333-long-ton (23,707 t). But it was not possible to go further, as the Italian Navy was not satisfied with the 23,333-long-ton (23,707 t) battleship Italian project, with three twin 381-millimetre (15.0 in) turrets and a profile reminiscent of the Pola heavy cruiser (then in construction).[35][36] A complete artillery and power plant refit of the Conte di Cavour-class battleships would begin in 1933, and plans for a 35,000-long-ton (35,562 t) Standard displacement battleship would be going on.[37]
Dunkerque
In 1931, the French Admiralty explicitly confirmed the choice of a 23,333-long-ton (23,707 t) battleship, since the 17,500-long-ton (17,800 t) battleship would have been too lightly armored and the 35,000-long-ton (35,562 t) battleship would have required technical and financial capacities that outstripped France's capabilities. This 23,333-long-ton (23,707 t) battleship would have had a length of 213 metres (699 ft) and a 27.5-metre (90 ft) beam, two quad 305-millimetre (12.0 in)/55 turrets forward, three quad 130-millimetre (5.1 in) Dual Purpose (DP) turrets aft, a 30-knot (56 km/h; 35 mph) top speed, 230-millimetre (9.1 in) belt armor, and 150-millimetre (5.9 in) deck armor. However, when in May 1931 this proposal was submitted to the Parliament, the discussion lasted two months and there was much criticism, since it was difficult to understand why it was necessary to have twice the displacement of the warship to be countered and why it was not preferable to build a 35,000-long-ton (35,562 t) battleship. Thus, in the 1931 Estimates in July, funds were allocated only for further studies; in addition, the law had the stipulation that the final characteristics must be subject to a thorough review, the results of which would have to be submitted to the Parliament before passing any building orders.[38]At this point, Vice Admiral Durand-Viel, the new Chief of Staff of the French Navy from January 1931, requested further studies for upgrading the main artillery caliber – from 305 millimetres (12.0 in) to 330 millimetres (13 in) – to outgun the Italian battleships. This upgrade resulted in a displacement increase to 26,500-long-ton (26,925 t), a 2-metre (6.6 ft) length increase, a 2.5-metre (8.2 ft) beam increase, a slight maximum speed reduction to 29.5 knots (54.6 km/h; 33.9 mph), the substitution of 330-millimetre (13 in)/52 guns for 305-millimetre (12.0 in)/55 ones, two more double 130-millimetre (5.1 in) DP turrets, and a slight thickness increase in the armored belt and deck armor.[39][40] In early 1932, the project was approved by the Parliament committees, and the Minister of Defence (François Pietri) successfully included it in the 1932 Estimates. So emerged the Dunkerque, which was ordered on 26 October 1932 and laid down on 24 December 1932.[41]
After the Deutschland, the Admiral Scheer was laid down in June 1931 and the Admiral Graf Spee was laid down in October 1932.[42] Consequently, the French Navy asked to quickly have a second Dunkerque-class battleship; she was included in the 1934 Estimates.[43]
Facing the Scharnhorst and Littorio
Since the French Navy ship designers thought that the Dunkerque-class battleships' armor was able to resist 280 mm (11 in) caliber shells, they would not have needed to design a heavier battleship class. But Italy believed the new French battleships broke the balance between the French and Italian battleship fleets in the Mediterranean Sea. Italy thus designed new battleships, which were intended to counter not only the Dunkerque-class battleships but also the more heavily armed British Mediterranean Fleet battleships.[46] Duce Benito Mussolini announced on 26 May 1934 the decision of Italy to fully use the right to build battleships granted in the naval limitation treaties. Some days later, the Stefani news agency announced the laying down of two 35,000-long-ton (35,562 t) battleships,[39] armed with nine 381 mm (15.0 in) guns;[47] in October 1935 these received the names of Littorio and Vittorio Veneto.[46]
Eight days later (on 24 July 1934), the French Navy Board set the new French battleships' specifications as follows:[49]
- Standard displacement: 35,000 long tons (35,562 t)
- Main armament: eight or nine 380 mm (15.0 in) or 406 mm (16.0 in) guns
- Secondary armament: capable of fire against both surface targets and long-range anti-aircraft fire
- Maximum speed: 29.5–30 knots (54.6–56 km/h; 33.9–35 mph)
- Armor: belt 360 mm (14 in); upper armored deck 160 mm (6.3 in); lower armored deck 40 mm (1.6 in); underwater protection as with the Dunkerque
Germany went a step further, laying down two new battleships, the Bismarck in November 1935 and the Tirpitz in June 1936. These ships, strongly armored as their protection absorbed more than 40% of their standard displacement, with a very large beam of 36 metres (118 ft), got a very classic design, eight 380 mm (15 in) guns in double turrets (two forward and two aft) and the secondary anti-ship artillery as six double 150 mm (5.9 in) turrets on the sides. Their powerful anti-aircraft artillery in sixteen 105 mm (4.1 in) guns in eight double turrets, plus numerous 37 mm (1.5 in) and 20 mm (0.79 in) mountings, controlled by six high-angle directors was unmatched anywhere[51]; officially declared as 35,000 long tons (35,562 t), their displacement was actually more than 42,000 long tons (42,670 t) standard and even nearing 50,000 tonnes (49,210 long tons) full load.[52][53] The French answer was the laying down of the second Richelieu-class battleship, the Jean Bart, in December 1936.[50]
Design
Richelieu and Jean Bart
Vice Admiral Durand-Viel, the Chief of the Navy's General Staff, was very concerned about continuity between the Richelieu battleship class and the preceding Dunkerque battleship class (whose lead ship had been ordered only two years before), in order to reduce to a minimum planning and construction delays and to create homogeneous combat groups. It was therefore envisaged a similar main and secondary artillery disposition.[49]Armament
Main artillery
The French Navy Board had indicated in July 1934 a minimum caliber of 380 mm (15.0 in) – dictated by the Italian Navy's choice – and a maximum caliber of 406 mm (16.0 in) – the Washington Treaty limit. For the number of guns, eight was the minimum for efficiently spotting salvos [g]; this was one reason the Italian Navy had not been satisfied by the 23,300-long-ton (23,674 t) battleship project of 1931, which had only six 381 mm (15.0 in) guns. The maximum of nine guns corresponded to a battery of three triple turrets, as announced by the Stefani News agency for the new Italian battleships.[47]An arrangement of two quadruple turrets would save more than a quarter of the turret armor weight (as compared to four double turrets), while retaining the same firepower, but it was quickly determined that the 380 mm (15.0 in) caliber was the largest feasible for a quadruple turret. With a 106-foot (32.31 m) beam and 406 mm (16.0 in) guns, the Nelson-class battleships had accommodated only triple turrets. But on the Dunkerque, with a 31.10 m (102.25 ft) beam and 330 mm (13.0 in) guns, the four barrels of each turret were not mounted independently (in separate cradles) because this would have meant an unduly large barbette diameter. For this reason the right and left pairs of barrels were placed in a single common mount each.[41] However, the fore and aft main quadruple turrets of the British King George V-class battleships will have independent mounting,[55] as these ships will have nearly the same beam, 103-foot (31.39 m) versus 102.25 ft (31.10 m), and 1-inch (25.4 mm) more for the main guns caliber, 14-inch (356 mm) versus 13 in (330 mm), than on the Dunkerque.[56][57][1]
The quadruple turret's major drawback was the risk of taking a single unlucky shot which would destroy one turret and cripple half the main battery; to help prevent this, the Dunkerque-class battleships' quadruple turrets had been divided internally, with a 25–40 mm (0.98–1.6 in) bulkhead to localize damage.[58] This method has been effective at Mers-el-Kebir, when the first British 381 mm (15.0 in) shell striking the Dunkerque ultimately hit the second 330 mm (13.0 in) turret; this killed all crew in the turret's right half, but the left half remained operational.[59]
But the all-forward arrangement of two quadruple turrets, and more broadly the proximity between the two main artillery magazines (one for each turret), induced the greatest risk: one hit could potentially cripple the entire main battery, or even cause the ship's loss from an ammunition explosion. On the Dunkerque, to avoid this risk the forward turrets had been positioned 27 meters (89 ft) apart from one another,[41] further apart than on the Nelson-class battleships.[60] Even so, the French Navy studied various other solutions, with three turrets (one quadruple and two double, two triple and one double, or three triple). In every case, with three turrets there would have been a weight excess in comparison with two quadruple turrets, and in consequence a propulsion plant power reduced to 100,000 horsepower (74.6 MW) and a speed loss of 2.5 knots (4.6 km/h; 2.9 mph), for a small benefit of distributing the main armament over a greater length.[61] Therefore, following the proposal of STCN's head, the Chief of Navy General Staff chose as early as November 1934 the all-forward arrangement with two quadruple turrets.[62]
Each Richelieu turret was divided in two half turrets, by a 25 mm (0.98 in) to 45 mm (1.8 in) bulkhead. The guns, in the half turrets, were in pairs, and although each gun was in a separate cradle, the relative movement of the guns of each pair was limited. The guns were so close (1.95 meters (6.4 ft), only 0.30 meters (0.98 ft) more than on the Dunkerque) that a wake effect between shells fired simultaneously by a half turret lead to an excessive dispersal, which was not corrected before 1948 on the Richelieu.[68] The turrets were positioned 32.5 meters (107 ft) apart from one another, 3.70 meters (12.1 ft) more than on the Dunkerque.[69][70]
The weight of one barrel was 110 tonnes (108 long tons).[63] This weight was: less than the 181 tonnes (178 long tons) barrel on the Yamato,[65] or the 130 long tons (132 t) barrel on the Nelson;[67] nearly the same weight as the 112 tonnes (110 long tons) barrel on the Nagato,[65] the 109 tonnes (107 long tons) barrel on the Bismarck,[71] the 107 long tons (109 t) barrel on the Iowa,[66] the 102 tonnes (100 long tons) barrel on Littorio,[64] or the 97 long tons (99 t) Queen Elizabeth barrel; and more than the 80 long tons (81 t) King George V barrel.[67]
The maximum angle of elevation of guns on the Model 1936 turret was 35°. With a 830 meters per second (2,700 ft/s) muzzle velocity, the maximum range was theoretically 41,500 meters (45,400 yd), practically 37,800 meters (41,300 yd). The rate of fire was from 1.3 rounds per minute to 2 rpm. The maximum horizontal turning speed was 5°/s, and the maximum elevating speed 5.5°/s.
The 380 mm (15 in) shell was an Armor Piercing Capped (APC) shell, registered in the French Navy as Obus de Perforation (OPf). The OPf Model 1935 was a further development of the 330 mm (13 in) OPf Model 1935, in use on the Dunkerque, except that its molded base formed a boat tail that assisted in keeping the shell stable in flight. The 380 mm (15 in) shell was 1.905 meters (6.25 ft) long and weighed 884 kilograms (1,950 lb), less than the 406 mm (16.0 in) USS Massachusetts' shell (1,224 kilograms (2,700 lb)),[66] that glancingly hit the Jean Bart at the battle of Casablanca (1942), and some kilos more than the weight of the 381 mm (15.0 in) shells of HMS Barham or HMS Resolution (875 kilograms (1,930 lb)),[67] that lightly damaged the Richelieu at the battle of Dakar (1940).[72]
The OPfK Model 1935 incorporated a dye bag and fuze (dispositif K) to color[i] not only misses but hits, thereby facilitating spotting for ships operating in formation while in combat. No High Explosive (HE) variant of the 380 mm (15 in) shell was originally provided. A total of 832 APC shells were intended to be provided, slightly fewer than for the Dunkerque-class battleships (896 rounds).[73]
Remote Power Control (RPC) was to be fitted for both horizontal turning and elevation; however, the failure of the Sautter-Harlé-Blondel system fitted on the Dunkerque-class battleships resulted in a loss of confidence in the application of this technology to heavy armored turrets, and it was never fitted.[74]
Secondary artillery
For the secondary artillery, all early projects kept the 130 mm (5.1 in) caliber, in five quadruple Dual-Purpose turrets, at the same position as on the Dunkerque-class battleships, but with quadruple turrets amidships, instead of double turrets. A tertiary anti-aircraft 75 mm (3.0 in) zénithaux battery was considered, to complement the early design sketch's 130 mm (5.1 in) DP battery.[79]
Since at the time torpedo surface attacks were considered more damaging than aircraft bombing, a heavier caliber was required for the anti-ship battery. Since the Nelson-class battleships, the Royal Navy had adopted a six 152 mm (6.0 in) double turrets battery as the secondary artillery on battleships. The Kriegsmarine had chosen 150 mm (5.9 in) guns on the Scharnhorst, and the Italian Navy was fitting the 35,000 long tons (35,562 t) battleships with 152 mm (6.0 in) caliber guns. It was decided to use triple 152 mm (6.0 in) turrets, as fitted on the most recent light cruisers, the Émile Bertin and the La Galissonnière-class cruisers that were then being built. The S.T.C.N. proposed three solutions: five 152 mm (6.0 in) turrets and six 75 mm (3.0 in) single mountings; or four 152 mm (6.0 in) turrets, without the fifth turret (central axial); or with two center line aft turrets in a superfiring position, and eight 75 mm (3.0 in) single mountings, but it was difficult to install this AA battery while keeping it out of the blast effects of the main and secondary batteries.[77]
The French Naval Board in April 1935 resolved to fit the Richelieu with five 152 mm (6.0 in) turrets in the same placement as for the 130 mm (5.1 in) battery on the Dunkerque. It was decided that these 152 mm (6.0 in) turrets had to be dual-purpose, and that the tertiary 75 mm (3.0 in) AA battery had to be abandoned, as the substitution of 152 mm (6.0 in) DP turrets, weighing 306 tonnes (301 long tons) to the 130 mm (5.1 in) turrets, weighing 200 tonnes (197 long tons),[63] was inducing an weight excess of about 530 tonnes (522 long tons). It was also decided to install a new weight-saving propulsion plant, generating the same power of 150,000 horsepower (110 MW), but using more compact Sural boilers, than those fitted on the Dunkerque. It was therefore possible to reduce the number of boiler rooms from three to two, which allowed a reduction of the armored belt's length of nearly 5 meters (16 ft), and consequently of its weight. As another weight-reduction measure, the armored belt's thickness was reduced from 360 mm (14 in) planned to 330 mm (13 in) and its inclination increased from 11°30' to 15°24' to compensate for the thickness reduction. The armor thicknesses of the longitudinal bulkheads, conning tower, and turrets and barbettes of the 152 mm (6.0 in) guns were also reduced.[77]
The triple 152 mm (6.0 in) Model 1936 Dual Purpose turret was a further development of the 152 mm (6.0 in) Model 1930 Low-Angle turret. The guns, mounted on separate cradles, were 1.85 meters (6.1 ft) apart. The horizontal turning speed was 12°/second, and the elevation speed was 8°/s. The guns' maximum elevation was 90°, with loading at every elevation theoretically possible. The muzzle velocity was 870 meters per second (2,900 ft/s). The shells to be used against sea targets were Semi Armored Piercing (SAP) shells with a dye bag, registered in the French Navy as OPfK Model 1931, weighing 56 kilograms (120 lb), or 57.1 kilograms (126 lb) for the OPfK Model 1937. Against aircraft, the 152 mm (6.0 in)/55 Model 1930 guns would be firing High Explosive (HE) shells, registered as OEA (Obus Explosif en Acier) Model 1936 and weighing 54.7 kilograms (121 lb), or 49.3 kilograms (109 lb) for the OEA Model 1937. Starshells, registered as OEcl (Obus Eclairant) Model 1936 and weighing 47 kilograms (100 lb), were to be provided for the amidships turrets. The rate of fire was 6.5 rounds per minute, against sea targets, and 5 rpm against aircraft. The maximum range against sea targets, with a 45° elevation, was 24,500 meters (80,400 ft). Full RPC was fitted. On the Richelieu, the planned ammunition load was 2000 SAP shells, nearly 1000 HE shells, and 650 illuminating shells, for the three triple turrets fitted.[80]
The 152 mm (6.0 in) Model 1930 Low-Angle turret proved to be highly satisfactory, at least comparable to the German single or twin 150 mm (5.9 in) gun turrets, or the Italian triple 152 mm (6.0 in) turrets Model 1934 or 1936. But for anti-aircraft purposes, the 152 mm (6.0 in) Model 1936 turret was thought to be complex and fragile, with a too-slow rate of fire against rapid-moving aerial targets, with a deficient RPC, and with jamming in loading at angles greater than 45°. These problems were probably due to the too-great weight, 228 tonnes (224 long tons) without the barbette, of the 152 mm (6.0 in) DP Model 1936 turret; this was nearly 56 tonnes (55 long tons) heavier than the 172-tonne (169-long-ton) 152 mm (6.0 in) Model 1931. During WWII, there were no other 152 mm (6.0 in) guns used as an anti-aircraft battery; however, they were successfully used post-war in two Worcester-class U.S. Navy cruisers and three Tiger-class cruisers of the Royal Navy, albeit with much better RPC and fire-control devices than the pre-WWII French ones.[81]
At the war's very beginning (in November 1939), it became evident that the projected 37 mm (1.5 in) ACAD Model 1935 (automatic anti-aircraft twin) mountings would not be provided in time for the Richelieu's completion; thus, a drastic revision of the AA battery was needed. The midship 152 mm (6.0 in) turrets had to be canceled, and twelve 100 mm (3.9 in)/45 Model 1930 guns in six twin 100 mm (3.9 in) mountings, CAD Model 1931, would instead be fitted, as they had been on the last 10,000 long tons (10,160 t) Treaty cruiser (the Algérie). To respect the priority of completing the Richelieu first, four mountings had to be removed from the reconstructed battleship Lorraine,[82] and two from a battery near Marseilles.[83] The 152 mm (6.0 in) amidships turrets were not even mounted on the Jean Bart; nor were barbettes installed. The 100 mm (3.9 in) mountings were fitted on Richelieu in April–May 1940.[84]
The 100 mm (3.9 in) CAD Model 1930 turrets were dual-purpose. SAP shells (100 mm (3.9 in) OPf Model 1928, weighing 15 kilograms (33 lb)) would be used for sea targets, with a muzzle velocity of 765 meters per second (2,510 ft/s) and a 15,800 meters (51,800 ft) maximum range, but only 10 rounds per gun were intended, due to the belief that the anti-ship fire would be mainly done by the stronger 152 mm (6.0 in) guns. HE shells (100 mm (3.9 in) OEA Model 1928, weighing 135 kilograms (300 lb)) would be used on aerial targets, with a muzzle velocity of 780 meters per second (2,600 ft/s) and a 10,000 meters (33,000 ft) ceiling (at the 80° maximum elevation). The rate of fire was 10rpm. Illuminating shells (100 mm (3.9 in) OEcl Model 1928) were provided to replace the 152 mm (6.0 in) OEcl Model 1936.[80] The 100 mm (3.9 in) guns proved to be the only reliable arms of the Richelieu until 1942, due to the uncompleted or obsolescent fire control of the 380 mm and 152 mm batteries.
Anti-aircraft light artillery
For short range anti-aircraft defense, the French Navy had planned to develop for the Dunkerque-class battleships an automatic version (37 mm (1.5 in) ACAD Model 1935) of the 37 mm (1.5 in) semi-automatic anti-aircraft with twin mountings (CAD Model 1933); the latter had a theoretical firing rate of 30 to 40 rpm. Hand loaded using a six-round box magazine, the actual firing rate was 15 to 20 rpm; in the same time period, the British Pom Pom gun and the Swedish designed Bofors 40 mm/L60 gun had a 120 to 200 rpm firing rate. Therefore, the 37 mm (1.5 in) ACAD Model 1935 was expected to have a firing rate of 120 rpm or above. However, in 1940 only a prototype ACAD mounting (designated Model 1936) was tested (aboard the old patrol sloop Amiens; it was apparently successfully used during the Dunkirk evacuation).[85]Six 37 mm (1.5 in) ACAD Model 1935 mountings would have been fitted, four abeam[clarification needed] the after funnel superstructure, and two abeam turret II. Four fire control systems, equipped with a 2-meter (6.6 ft) rangefinder and linked to the mountings by a RPC system driven by Sautter-Hallé electric servomotors, were intended to be installed: two for the forward mountings, abaft turret II, one deck higher, and two for the after mountings, abeam the mountings, one deck higher. This 37 mm (1.5 in) battery would have been complemented by six or eight 13.2 mm (0.52 in) Hotchkiss quadruple MG mountings (CAQ Model 1929) on the upper platforms of the forward and after towers.[86]
Fire control systems
The most conspicuous difference in the Richelieu and Dunkerque profiles was the mounting of the fire control director system aft, not on a separate tower located behind the funnel, but on a kind of mack, so that the funnel opening came out obliquely aft underneath the control tower.[87] Otherwise, the fire control system was very similar to the Dunkerque's. All the fire control systems were airtight and fitted with light steel plating against the machine gun attacks of strafing aircraft.[88]Three fire control systems were mounted one over the other atop the fore tower. The lowest was the A system, for the main artillery, with a 14-meter (46 ft) triple stereoscopic OPL (Optique de Précision de Levallois-Perret) rangefinder. For the 152 mm (6.0 in) artillery, there were two fire control systems. System 1, in the upper position, was for anti-aircraft gunnery and had a 6-meter (20 ft) double stereoscopic OPL rangefinder. System 2, in the central position, was for anti-ship gunnery and had a 8-meter (26 ft) double stereoscopic OPL rangefinder. [89]
The same noteworthy weight accumulation in the fore tower top as on the Dunkerque proved to be a problem when the Richelieu was torpedoed at Dakar, as a whiplash effect on the main mast around which they were mounted provoked more serious effects on the fore tower systems than on those on the after tower, despite that the latter was nearer the torpedo explosion.[90]
On the after tower, there was only the auxiliary system for the 152 mm (6.0 in) artillery (system 3) with a 6-meter (20 ft) double stereoscopic OPL rangefinder. The auxiliary (B) system for the main artillery was between the funnel and the axial aft 152 mm (6.0 in) turret and had an 8-meter (26 ft) double stereoscopic OPL rangefinder. Each main artillery turret was fitted with a 14-meter (46 ft) double stereoscopic OPL rangefinder, and each 152 mm (6.0 in) turret with a 8-meter (26 ft) double stereoscopic OPL range finder. Two systems with 3-meter (9.8 ft) OPL rangefinders provided for the flag staff were installed on the wings of the admiral’s bridge. When the 100 mm (3.9 in) AA battery was fitted, they were replaced by systems fitted with 4-meter (13 ft) OPL rangefinders for this battery's fire control. Two systems also fitted with 4-meter (13 ft) rangefinders were then mounted on the navigation bridge, one deck lower. There was also a 3-meter (9.8 ft) SOM (Société d'Optique et de Mécanique de haute précision) stereoscopic tactical rangefinder atop the admiral's bridge. As on the Dunkerque-class battleships, the systems provided raw target data to the transmitting station located beneath the armored decks, with continuous transmission to the director and the guns.[88]
The lookout and target designation facilities were similar in principle to the Dunkerque's. The lower lookout station (veille basse) for close-range contacts was on platform 3 of the fore tower. The middle level (veille éloignée), for both surface and aerial contacts, was on platform 6, and the upper lookout station (veille haute), primarily for spotting torpedoes and mines, was on platform 9.[91] For night firing, there were five 1.20-meter (3.9 ft) searchlights, one atop the admiral's bridge and two on either side of the funnel structure.[92]
Aircraft installations
As on the Dunkerque, aircraft installations (aircraft hangar, crane and two catapults, for four seaplanes) were fitted on the Richelieu's stern. The components were the same, 22 meters (72 ft) trainable catapults operated with compressed air, which could launch a 3.5 tonnes (3.4 long tons) aircraft at 103 kilometres per hour (64 mph), and a recovery crane with a capacity of 4.5 tonnes (4.4 long tons). The aircraft were (flying boat) seaplanes of the Loire 130 type – single-engined (720 hp Hispano-Suiza 12-cylinder liquid cooled) with a 3,500 kilograms (7,700 lb) weight, a 210 kilometres per hour (130 mph) maximum speed, a 165 kilometres per hour (103 mph) cruise speed at 1,500 meters (4,900 ft), two 75 mm (3.0 in) machine guns and two 75 kilograms (170 lb) bombs.[93]There were, however, differences from the Dunkerque's aircraft installations, resulting from the differing boiler placement: three side by side in each boiler room, instead of two; thus, there was only one boiler room under the funnel instead of two. Consequently, the aft 152 mm (6.0 in) turret on the center line, turret VII, was on frame 68.85[j] on the Richelieu, versus on frame 44.30, on the Dunkerque, as the aft lateral secondary turrets were respectively on frame 54.45, versus 53.30.[69][70][k] With 36.50 meters (119.8 ft) on the quarterdeck between the aviation hangar and the stern on the Richelieu, instead 30 meters (98 ft) on Dunkerque, this enabled a second catapult to be worked in, the catapults being offset to port and starboard en échelon[l] with an elevator between them. The planes were moved on rails from the hangar to the elevator where they were placed on both catapults. Two planes were to be stowed in the 25-meter (82 ft) hangar on the same level, wings folded and in line, instead of being placed on the two platforms of a two-tier hangar lift, and two on the catapults with wings deployed.[94]
Protection
| Ship | Protection (tons) |
Protection (%) |
Displacement (tons) |
With fuel (tons) |
Fuel load |
|---|---|---|---|---|---|
| Richelieu | 16,045 16,045 |
39.2 42.4 |
(normal) 40,927 (standard) 37,832 |
2,905 – |
1/2 – |
| Dunkerque | 11,040 | 35.9 | (normal) 30,750 | 2,860 | 3/4 |
| Strasbourg | 11,785 | 37.3 | (normal) 31,570 | 2,860 | 3/4 |
| Iowa | 18,700 | 41.6 | (standard) 45,000 | ||
| Bismarck | 17,540 17,258 |
43.92 41.30 |
(light) 39,931 (standard) 41,781 |
||
| King George V | 12,500 | 34.8 | (standard) 35,000 | ||
| Littorio | 13,600 | 36.03 | (standard) 37,750 |
Armor
The armor thicknesses were as follows:[101]- The armored belt, with a slope of 15°24’, was 327 mm (12.9 in) thick between frame 51.50 and frame 182.95 and from 3.38 meters (11.1 ft) above the waterline to 2.50 meters (8.2 ft) under the water line. The forward bulkhead, at frame 182.95, and the after bulkhead, at frame 51.50, extended from the main deck to the 30 mm (1.2 in) thick floor of the artillery magazines, and were 233 mm (9.2 in) thick. The forward bulkhead thickness was increased to 355 mm (14.0 in) between the first and second platform decks.
- The upper armored deck at main deck level was 150 mm (5.9 in) thick above the machinery plant and was increasing to 170 mm (6.7 in) above the main artillery magazines. The lower armored deck was 40 mm (1.6 in) thick and extended to frame 233, improving the protection of the forward part of the ship, left unprotected on the Dunkerque. Abaft the after transverse bulkhead, there was (at the first platform deck level) a 100 mm (3.9 in) armored deck with angled sides in the form of a carapace above the shafts, increasing to 150 mm (5.9 in) above the steering gear.
- On the conning tower, the armor was 340 mm (13 in) thick on the front and sides, 280 mm (11 in) on the rear, and 170 mm (6.7 in) on the roof.
- The main turrets were protected with a 405 mm (15.9 in) thick armor on the barbette, above the upper armored deck; 430 mm (17 in) armor on the faces, inclined to 30°; from 170 mm (6.7 in) to 195 mm (7.7 in) on the roof; 270 mm (11 in) on the turret I rear wall; and 260 mm (10 in) on the turret II rear wall. This thickness on the rear walls, less than on the Dunkerque or Strasbourg with about 345 mm (13.6 in) thickness, was due to the use of a cemented steel on the Richelieu.
- The 152 mm (6.0 in) gun turrets were less armored than the Dunkerque quadruple 130 mm (5.1 in) turrets, with a 100 mm (3.9 in) thickness on barbettes, 130 mm (5.1 in) on the faces angled at 45°, 70 mm (2.8 in) on sides and roof, and 60 mm (2.4 in) on the rear.
The U.S. Navy battleships had an equivalent armored belt (about 335 mm (13.2 in)) to the Richelieu, on the North Carolina and South Dakota classes, and a little less thick (310 mm (12 in)) on the Iowa class. The main artillery turret protection was less thick (406 mm (16.0 in)) on the North Carolina class, equivalent (430 mm (17 in)) on the Iowa class, and thicker (457 mm (18.0 in)) on the South Dakota class. The horizontal armor was a little less thick (104 mm (4.1 in)) on the North Carolina class and equivalent (127 mm (5.0 in) to 165 mm (6.5 in)) on the South Dakota and Iowa classes. The conning tower was better protected, with 406 mm (16.0 in) on the North Carolina and South Dakota classes and with 445 mm (17.5 in) on the Iowa class.[104]
The Italian Littorio had a thicker armored belt (350 mm (14 in)) than the Richelieu, but otherwise they were less protected, with 350 mm (14 in) on the main artillery turrets, 260 mm (10 in) on the conning tower, 50 mm (2.0 in) on the upper armored deck and 100 mm (3.9 in) on the main deck.[105] The German Bismarck-class battleships had a thinner armor than the Richelieu on the main artillery turrets (356 mm (14.0 in)), but thicker on the conning tower (356 mm (14.0 in)), and equivalent for the armored belt (320 mm (13 in)) and horizontal armor (80 mm (3.1 in) to 115 mm (4.5 in)).[51]
Underwater protection
As on the Dunkerque, the underwater protection consisted of a sandwich of void spaces, light bulkheads, liquid loading compartments or compartments filled with a rubber-based water-excluding compound (ébonite-mousse), and a heavy internal holding bulkhead to absorb the explosion of a torpedo head.[106]The compartment outward of the inclined armor belt had a maximum depth of 1.5 meters (4.9 ft), and had a filling of ébonite mousse. Inward of this compartment, there was a 18 mm (0.71 in) bulkhead, enclosing a void compartment 0.9 meters (3.0 ft) deep, then an oil fuel bunker 3.4 meters (11 ft) deep (0.5 meters (1.6 ft) less than on the Dunkerque), then a 10 mm (0.39 in) bulkhead, containing a void compartment 0.67 meters (2.2 ft) deep, backed by a 30 mm (1.2 in) torpedo bulkhead of special steel. The maximum width was around 7 meters (23 ft). The reduction of 0.5 meters (1.6 ft) comparing with Dunkerque was necessary to accommodate three boilers side by side in the boiler rooms.[100]
This figure of 7 meters (23 ft) width was impressive, compared with the 4.10 meters (13.5 ft) on the King George V, 5 meters (16 ft) on the Scharnhorst, or 6 meters (20 ft) on the Bismarck.[107] The Italian Littorio-class battleships had a peculiar underwater protection system, designed by the Italian chief designer, Generale Ispettore del Genio Navale Pugliese, which incorporated a 3.8-meter (12 ft) diameter cylindrical expansion space. During the British aircraft attack on the Italian battleship fleet in Taranto, on 11 November 1940, this did not prevent the sinking of the Littorio in shallow water. But the Achilles' heels of battleships facing torpedo attacks were their vitals that could not be protected, such as the shaft of the Richelieu at Dakar, on 8 July 1940, or the rudder of the Bismarck in May 1941.[108]
Propulsion
The French designers of the Richelieu had various constraints: a 33.5 meters (110 ft) beam to accommodate the barbettes of four 380 mm (15 in) gun turrets, a 245 meters (804 ft) long hull, limited by the length of the Navy shipbuilding infrastructure, and thus a length/beam ratio of 7.3. All this required machinery generating 150,000 hp to reach the 30 knots (56 km/h; 35 mph) requested by the French Navy Board.[109] It was then the greatest mechanical power installed on a battleship. It would be surpassed only on U.S. Navy Iowa-class battleships in 1943–1944. An equivalent speed had been reached with less power (144,000 hp) on HMS Hood,[110] but with a 262 meters (860 ft) hull, a 42,000 tonnes (41,000 long tons) displacement, and a ratio length/beam of 8; this was done without shipbuilding restraint or any displacement Treaty limit. All British or U.S. battleships built in the late 1930s, having to respect the 35,000 tons displacement limit, had a speed of 29 knots (54 km/h; 33 mph) – the King George V class – or 28 knots (52 km/h; 32 mph) – North Carolina or South Dakota classes; they were 225 meters (738 ft) or 215 meters (705 ft) long, with a propulsion plant developing respectively 110,000, 120,000, or 130,000 hp.[56][111] The Italian Littorio-class battleships reached 30 knots (56 km/h; 35 mph) with a 230 meters (750 ft) hull and 140,000 hp.[112] The German battleship Bismarck had a 29-knot (54 km/h; 33 mph) speed with 138,000 hp, and reached 31 knots with forcing for 150,000 hp,[98] with a length/beam ratio of only 6.9 as she had nearly the same hull length as the Richelieu, but a wider beam (36 meters (118 ft)).[51]The propulsion of the Richelieu was assured by six Indret boilers, and four Parsons turbines. The boilers were of a new type, the so-called suralimenté meaning pressure-fired (and thus the abbreviation of Sural) boilers. These boilers were operated at a pressure of 27 kg/cm² (384 lb/in²) at 350 °C (662 °F),[109] as on the Dunkerque, but forced circulation and pressure firing resulted in steam production per cubic meter well in excess of conventional boilers (14.4 kg/m³).[113] They were 6.30 meters (20.7 ft) long versus 5.33 m in on the Dunkerque, 4.65 meters (15.3 ft) height versus 5.34 meters (17.5 ft), and moreover 4.50 meters (14.8 ft) wide versus 6.50 meters (21.3 ft). Thus, due to the 2-meter greater beam of Richelieu, it was possible to install three boilers side by side in two boiler rooms, instead of three rooms as on the Dunkerque. Boiler room 1 was underneath the fore tower, with, from starboard to port, boilers #10, #11, and #12, followed by the forward engine room housing the geared turbines for the wing shafts. Boiler room 2 (directly underneath the funnel), with boilers #20, #21, and #22, produced the steam for the center shaft turbines in the aft engine room. A 18 mm (0.71 in) bulkhead separated the forward engine room from boiler room 2, dividing the machinery into two independent units.[114].
In each Engine Room, there were two sets of turbines, each driving a four-bladed propeller with a diameter of 4.88 meters (16.0 ft). Each set comprised a single High Pressure (27 kg/cm²) turbine, a Medium Pressure (10 kg/cm²) turbine, and two Low Pressure two-flow rotor turbines (4 kg/cm² and 1.25 kg/cm²). Four turbo generators, each of 1,500 kilowatts (2,000 hp), were used; two were in the forward engine room, and the other two in a separate compartment directly abaft the main machinery spaces, adjacent to the magazines for the after 152 mm (6.0 in) turrets.[115]
The maximum fuel load for peace-time cruising was 5,866 tonnes (5,773 long tons), but in wartime this figure was reduced to 4,700 tonnes (4,600 long tons) to maximize the underwater protection system's effectiveness, since filling the liquid loading compartments to the brim created additional pressure on bulkheads instead of absorbing the pressure of explosion. The radius of possible travel was 9,850 nautical miles (18,240 km; 11,340 mi) at 16 knots (30 km/h; 18 mph), 8,250 nautical miles (15,280 km; 9,490 mi) at 20 knots (37 km/h; 23 mph), and 3,450 nautical miles (6,390 km; 3,970 mi) at 30 knots (56 km/h; 35 mph).[116]
During speed trials, in April 1940 developing 123,000 hp 30 knots (56 km/h; 35 mph) were maintained with near 42,000 tonnes (41,000 long tons) displacement, and in June 32 knots (59 km/h; 37 mph) were maintained for 3 hours and 30 minutes, with 43,800 tonnes (43,100 long tons) displacement and 155,000 hp, and 32.68 knots (60.52 km/h; 37.61 mph) were reached with 179,000 hp forcing[clarification needed].[117]
1938 Supplementary Program Battleships
In 1937, Italy ordered two more Vittorio Veneto-class battleships, to be laid down in 1938. The French reaction was to order two more Richelieu-class battleships, with an improved design since the limited French naval building capacity required some delays before laying these units down.[118]The second London naval disarmament conference's failure had marked the end of international naval armament limitation policy. Japan had withdrawn from the conference on 15 January 1936; Italy also declined to sign the Second London Naval Treaty. A so-called "escalator clause" had been included at the American negotiators' urging, allowing the signatory countries of the Second London Treaty (France, the United Kingdom and the United States) to raise the battleship main battery caliber limit from 14 inches (356 mm) to 16 inches (406 mm), and the limit for battleship displacement from 35,000 tons to 45,000 tons, if Japan or Italy still refused to sign after April 1, 1937.[119] Ultimately the U.S.A. adopted 16-inch (406 mm) guns for their new fast battleship classes,[120] whereas the United Kingdom chose to respect the original Second London Naval Treaty limitations for the King George V-class battleships. Germany was not concerned, as she had not been invited to the second London naval disarmament conference, but officially the battleships Bismarck and Tirpitz had 380 mm (15 in) guns and 35,000 tons displacements. France decided to respect the limitations of 35,000 tons and 380 mm (15 in) as long as no continental European power had broken them.[119][121] Bearing such considerations in mind, the new Chief of the Navy General Staff (Chef d'Etat-major Général de la Marine), Admiral Darlan, ordered in December 1937 a study of new designs for two battleships,[122] especially since the Dunkerque's trials were showing problems with her design, especially her all forward quadruple turret main artillery and her dual purpose (anti-aircraft and anti-ship) secondary artillery of relatively light caliber.[123]
Three projects were studied, the first (project A) with the same quadruple arrangement forward as the Richelieu, but different secondary artillery arrangements, the second (project B) with one quadruple turret forward and one quadruple turret aft, the third (project C) with two fore triple turrets and one triple turret aft, in every case with a 380 mm (15 in) caliber. Project C lead to an excess displacement of 5,000 tons over the limit of 35,000 tons, so it was not proposed to the Chief of the Navy General Staff.[124]
In June 1938, the French Admiralty's choice was tightly linked with the need to maximally use the shipyards where very large ships could be built. The Salou #4 graving dock in the Brest Navy Yards was intended to be ready for building a new battleship in January 1939, when the Richelieu will have been be floated out, as all other building for large ships were in use. On the new Caquot dock, in the Penhoët Shipbuilding Yards in Saint-Nazaire, the Jean Bart was being built and expected to be floated out in late 1939-early 1940. In the same shipbuilding yard, on the #1 slipway where the SS Normandie and Strasbourg had been laid down, the Joffre was to be built from November 1938 till 1941. Consequently, it was not reasonable to keep the Salou building dock empty for at least six months, waiting to start building a Project B design battleship which necessitated at least one year to come up with definitive drawings after it had been ordered. Therefore, the Project A design was chosen for the first battleship to be laid down in the Salou building dock. The Caquot dock could then be used for the second battleship to be laid down.[121]
Admiral Darlan chose project A variant 2 for the first ship of the Richelieu class' second pair to be laid down; she received the name of Clemenceau. He chose project B variant 3 for the second ship – a design in which he was much involved – and named her Gascogne after the French area where he was born,[125] meaning also that this new battleship was a transition to a new battleship class again named after provinces.[126]
When in the summer of 1939 the French intelligence services warned the French Admiralty that the keels of two German battleships had been laid down, supposed to be of 40,000 tonnes (39,000 long tons) tonnage and with 406 mm (16.0 in) guns, but actually Plan Z H-39-class battleships, it was decided to design a ship free of the limitations of 35,000 long tons (36,000 t) and 380 mm (15 in). Based on the studies of 1938's Project C, new battleship designs emerged that led to the so-called Province or later Alsace-class battleships that were never even ordered.[127]
Clemenceau
On the Clemenceau, the main artillery arrangement was as on the Richelieu and Jean Bart. But the 152 mm (6.0 in) battery would have consisted of four triple turrets of 152 mm (6.0 in) caliber, two amidships (one on each side), and two aft in superfiring positions. Admiral Darlan, Chief of the Navy General Staff, thought that the three 152 mm (6.0 in) turrets aft on the Richelieu were a mistake, since two turrets in centerline positions would provide the same broadside of six guns and saved nearly 300 tonnes (300 long tons), allowing having six more 100 mm (3.9 in) AA mountings. Two of these mountings would have been positioned in front of the fore tower in superfiring position abaft the fore 380 mm (15 in) turrets, and four other ones, abeam the funnel and the axial aft 152 mm (6.0 in) turrets, and abaft the 152 mm (6.0 in) amidships turrets.[128] As the firing arcs of the 152 mm (6.0 in) turrets amidships were intended to be mainly directed forwards, the 100 mm (3.9 in) AA battery would have been shielded enough from their blast effects. Moreover these 100 mm (3.9 in) turrets would have been fully enclosed, with a 30 mm (1.2 in) plating against shrapnel. This new model of turrets was known as the 100 mm (3.9 in) CAD Model 1937, and also as the so-called «mine sweeper sloop type» since it was intended to be installed on the Elan and Chamois minesweeper sloop classes; it was also intended for the Le Fier destroyer class too, and as a secondary battery on the De Grasse cruiser class, to be commissioned in the late 1930s or early 1940s.[129]But this new arrangement had some difficulties. The second aft turret in superfiring position had a greater part of its barbette above the main armored deck, and thus needed more 100 mm (3.9 in) plating. Thus, the 152 mm (6.0 in) turret faces' armor thickness had to be reduced to 116 mm (4.6 in)– instead of 130 mm (5.1 in) – the armored belt's to 320 mm (13 in), and the main turrets' rear plates' to 250 mm (9.8 in). The auxiliary fire control system abaft the funnel, for the 380 mm (15 in) battery, was to be mounted about 2.5 meters (8.2 ft) higher than in the Richelieu, requiring a greater funnel height.[130] Two more fire control systems with OPL 5-meter (16 ft) stereoscopic rangefinders, for the 100 mm (3.9 in) AA battery, would have been installed on the sides of the fore tower. To save weight, particularly in the heights, the anti-ship fire control system for the 152 mm (6.0 in) battery would have not been installed, but the two remaining fire control directors for the 152 mm (6.0 in) battery, on the aft tower and on the fore tower in the upper position, would have been fitted with a stereoscopic 8-meter (26 ft) OPL rangefinder.[131] With these arrangements, the anti-ship and anti-aircraft artillery on the Clemenceau would be better than that originally intended for the Richelieu and Jean Bart.[132]
As a last consequence, the center line arrangement of the 152 mm (6.0 in) turrets aft placed the extreme aft turret (turret VI) in frame 54.45,[128] while on the Richelieu the extreme aft turret (turret VII; in the center line position) was on the 68.85 frame. Thus, the aviation hangar would have been shortened by nearly 15 meters (49 ft). But the aft lateral turrets' removal, which were on the Richelieu precisely on the frame 54.45,[69] would allow having a broader hangar. The two sea planes intended to be sheltered, wings folded, in the hangar would have been accommodated side by side instead of in line. Otherwise, the aviation facilities would have been the same as on the Richelieu.[133]
The short-range anti-aircraft battery would have been six twin ACAD Mode 1935 mountings, installed with their fire control systems on nearly the same positions as on the Richelieu, but the two forward mountings were lightly abaft the turret II barbette, and for the four after mountings one deck higher. New quadruple 37 mm (1.5 in) zénithaux[m] mountings, intended to be used against dive-bombing aircraft, would have been installed on each side of the quarterdeck near the aviation hangar.[134]
Gascogne
The most conspicuous change with the Gascogne would have been the return to a main artillery arrangement with a quadruple 380 mm (15 in) gun turret aft. This rearrangement of armament also would result in a shift of superstructures forward so that these were now mounted almost exactly midships and no longer at a considerable distance aft of the midship position as in the first Richelieu-class units.[130]The Gascogne's secondary artillery would have been three triple turrets of 152 mm (6.0 in) caliber, all on one axial line, two in a superfiring position forward and one between the funnel and the aft 380 mm (15 in) turret, which freed up the sides of the ship for eight anti-aircraft dual mountings of 100 mm (3.9 in) caliber.[135] As the 152 mm (6.0 in) guns' magazines would have been be near the main artillery turrets' magazines, which would increase risks, the 152 mm (6.0 in) turrets' armor had to be improved. First, in July 1938 it was proposed to increase the turret armor thickness to 190 mm (7.5 in) on the faces (instead of 130 mm (5.1 in)), 120 mm (4.7 in) on the roofs, and 100 mm (3.9 in) on the sides (instead of 70 mm (2.8 in)); the barbettes would have remained at 100 mm (3.9 in). In February 1939, a rebalancing was proposed with a thickness of 150 mm (5.9 in) for the barbette, 155 mm (6.1 in) for the turret faces, and from 135 mm (5.3 in) to 85 mm (3.3 in) for the turret sides. A thinner upper armored deck had been considered, reducing its thickness to around 145 mm (5.7 in), instead of around 160 mm (6.3 in),[136] but there is no proof that such a decision was actually taken, beyond a S.T.C.N. recommendation dated 5 March 1938.[137]
In the December 1938 designs, aircraft installations were intended to be fitted at the ship's center, with trainable catapults between the fore tower and the funnel, and a hangar at the after tower's base, but problems with positioning the 100 mm (3.9 in) AA battery too near the main and secondary batteries resulted, in February 1939, in again positioning the aircraft installations at the ship's stern. A single axial catapult would have had its pedestal countersunk in the quarterdeck, with an internal hangar in a recess under the first deck and a lift to hoist the seaplanes to the first deck level in order to avoid the blast effects of the rear 380 mm (15 in) turret firing, which also would have required positioning one deck higher the aft 381 mm (15.0 in) turret, on the Vittorio Veneto-class battleships.[138] The hull seaplanes would have been of a new twin-motored type, the Farman/NCAC NC 420, with an increased endurance (1,350 km at 240 km/h, versus 1,125 km at 150 km/h for the Loire 130). Its prototype was almost complete in June 1940 but never flew.[126] Two seaplanes would have been stowed in the hangar in line, and a third one would have been parked on rails on the quarterdeck, to the aviation hangar's starboard.[126]
Thus, the eight 100 mm (3.9 in) CAD Model 1937 turrets would have been positioned in four groups of two, amidships, in the four corners of the superstructure. Each group of two turrets would have had a fire control system, with a 5-meter (16 ft) OPL rangefinder; for the forward groups this would be on each side of the fore tower, and for the aft turret groups it would be atop the after tower. Thus, the backup system for the 152 mm (6.0 in) battery, would have been eliminated, and the secondary battery's fire control direction insured by the upper system in the fore tower for anti-ship gunnery and by the 100 mm (3.9 in) battery's systems for anti-aircraft gunnery.[137]
The six 37 mm (1.5 in) AA Model 1935 mountings would have been installed with four mountings abeam the forward turret (two on the forecastle and two a little abaft, one deck higher), with their fire control systems amidships between the fore and the aft tower, and the two after mountings would have been positioned abeam the after superstructure with their fire control systems a little forward and one deck higher. The 37 mm (1.5 in) zénithaux quadruple mountings would have had to be repositioned amidships between the fore and after towers, because on the quarterdeck – as on the Clemenceau – they would have been excessively exposed to the blast from the aft main turret.[139]
History
Richelieu
In April 1940, Richelieu went to sea for the first time. In late May and mid-June, the Commanding Officer, Captain Marzin carried out speed and gunnery trials, reaching 32 knots, and firing a few shots from her main and secondary batteries. Due to the advance of German troops, Richelieu hastily left Brest bound for Dakar on 18 June 1940, having on board 250 shells but only 48 powder charges for her main battery.[148] Escorted by the Adroit-class destroyers Fougueux and Frondeur, she reached Dakar on 23 June 1940.[149][150]
Dakar, under Vichy's orders
The 22 June 1940 armistice prompted British anxiety that the French Navy would be taken over by the Axis Powers. This led to attacks from the Royal Navy against the French warships (Operation Catapult): to seize them (in British harbors), sink them (at Mers el-Kebir), or intern them (at Alexandria). During the night of July 7 to 8, five days after the attack on the French fleet at Mers-el-Kebir, a team from HMS Hermes attempted to damage the Richelieu with depth charges moored under her stern, but they did not explode. In the morning, Swordfish bombers from the Hermes torpedoed Richelieu below the armored deck. This caused a 40-foot (12 m) long hole, and disabled the starboard propeller shaft; flooding caused her stern to touch bottom. One torpedo is likely to have hit the depth charges moored during the night. The crippled battleship was pumped out after a few days and made seaworthy for emergencies, and moored inside the Dakar harbor.[152]
On 24 September, the Richelieu took part in the defence of Dakar against British and Free French forces. There was a gunnery duel between Richelieu and the British battleships HMS Barham and HMS Resolution: HMS Barham was hit twice by the shore batteries manned by ratings from the Richelieu. In the engagement the Richelieu was struck by two 15-inch (380 mm) shells causing no serious damage; there were 250 near misses.[145][153] The Richelieu was damaged in the battle the first time her main battery fired: a 380 mm (15 in) shell blew back and disabled two guns in the #2 main turret; this was thought to be from the use of the wrong propellant type. There was no more firing during this day with the #2 main turret. On the day after, the #1 main turret was used instead. The propellant was changed to the SD19 propellant of the reconditioned Strasbourg powder charges; however, this caused serious problems regarding range-finding. In 1941, an inquiry commission under Admiral de Penfentenyo de Kervérégen concluded there had been a mistake in the shell base design.[154] During the two days, the Richelieu fired a total of 24 rounds. No hits were recorded. The third day, as HMS Resolution had been struck by a torpedo from a French submarine, the British and Free French force retreated.[155]
Temporary repairs were completed in Dakar; some light anti-aircraft mountings were added, partly taken from the wreck of the destroyer Audacieux (severely damaged by a heavy cruiser during the battle).[69] During the first months of 1941, the Richelieu was the first French battleship to be fitted with an early French radar (designated as "electro-magnetic detection"). On 24 April 1941, the Richelieu could sail at 14 knots (26 km/h; 16 mph) on three engines, the fourth propeller having been removed. During July 1941, three Loire 130 seaplanes were shipped.[156]
On the Allies' side
The seaplane equipment (hangar, catapults, and crane) had been removed in Dakar. The space thus spared on the stern was used to mount 40 mm (1.6 in) anti-aircraft guns on the rear deck. The overall anti-aircraft armament was massively reinforced, with 48 20 mm (0.79 in) AA guns in single mounts replacing the original 13.2 mm (0.52 in) Hotchkiss machine guns, and 14 quad 40 mm (1.6 in) turrets replacing the original 37 mm (1.5 in) semi-automatic guns. Adoption of US-pattern secondary batteries made providing ammunition easier; a special factory had to be set up to produce ammunition for the main battery. She remained with only two rangefinders on the fore tower, and the rear mast was shortened. She was fitted with air and surface warning radar, but the U.S. Navy was reluctant to provide gunnery practice radars.[158] All these modifications increased her displacement by 3,000 tonnes (3,000 long tons). After sea trials – with a maximum speed of 30.2 knots (55.9 km/h; 34.8 mph) – the refit was declared complete on 10 October 1943.[159][160]
The Richelieu sailed for Mers el-Kebir on 14 October and thence to Scapa Flow, arriving on 20 November. She served with the British Home Fleet from November 1943 to March 1944, participating in an operation off the Norwegian coast in January 1944. She was then transferred to the British Eastern Fleet to cover for British battleships undergoing refit; this was despite reportedly strong anti-Gaullist sympathies on board and limitations of her radar and ammunition (only available from US sources). She arrived at Trincomalee, Ceylon (now Sri Lanka) on 10 April 1944, in time to join the attack by Task Force 65 on Sabang on 19 April (Operation Cockpit) and on Surabaya in May 1944 (Operation Transom); she also served in Operations Councillor and Pedal, in June. On 22 July, she sailed to attack Sabang and Sumatra (Operation Crimson) and returned to Trincomalee on 27 July.[161]
Relieved by HMS Howe, the Richelieu returned to Europe. After about a week in Toulon, she sailed for Casablanca, where she arrived on 10 October 1944, for careening. She was refitted in Gibraltar in January 1945, and rejoined the Eastern Fleet till the end of the war against Japan, arriving back at Trincomalee on 20 March 1945.[159] Now with Task Force 63 of the British East Indies Fleet, she joined in more bombardments of Sabang in April and of the Nicobar Islands in late April to early May. The next operation, to intercept the Haguro, was abortive.[162]
The Richelieu refitted at Durban from 18 July to 10 August,[163] and arrived via Diego Suarez at Trincomalee on 18 August, learning of the Japanese surrender on 15 August.[164] She left Trincomalee on 5 September to participate in the liberation of Singapore, Operation Tiderace.[165] While she was passing down the Straits of Malacca on 9 September, at 07:44 a magnetic mine detonated 17 meters (56 ft) to starboard. She eventually limped into Singapore at noon on 11 September.[166][167]
Post war
After V-J Day, during the last three months of 1945, Richelieu took part in the return of French forces to Indochina, particularly at Nha Trang, with her Fusiliers Marins landing party, and delivering gun support. When Richelieu left for France, the crew received congratulations from General Leclerc, the French Commanding General in Indochina.[168][169] On 29 December, she sailed for France, and arrived in Toulon on 11 February 1946.After 1946, she had the classic existence of a warship during peacetime, alternating between training times and such tasks as, maneuvering with the aircraft carrier Arromanches – formerly HMS Colossus – when she joined the French Navy, taking the President of the French Republic for a visit to the French West Africa colonies in 1947 or officially visiting Portugal.[170] During a careening in Toulon in 1951, she was fitted with French-built radar devices, and received one new-built 380 mm (15 in) gun and three guns seized by the Germans, two having been installed during the war in shore batteries in Norway and in Normandy, the third having been used for trials at the Krupp proving grounds in Meppen (Germany).[171]
Once in her career (on 30 January 1956), she maneuvered with the Jean Bart for a few hours, before being based in Brest as a gunnery training school. Placed in the reserve fleet in 1958, she was in 1968 decommissioned and sold to Italian ship scrappers.[172]
Jean Bart
From Saint-Nazaire to Casablanca
The Jean Bart was laid down in December 1936; it was built in the large Caquot dock in Penhoët later named the "Jean Bart dock" and was expected to leave it in October 1940. In May 1940, it was decided that the uncompleted battleship had to be sent to a safer place in Britain or in French Africa, beyond the Luftwaffe's range. The ship was afloat in the fitting-out basin; however, this was separated from the navigational channel by an earth dam. When it appeared that the Battle of France was on its way to be won by the Wehrmacht by late May, work on dredging the earth dam was begun in order to be ready to leave at a high tide on June 20. Half the propulsion machinery (boilers and turbines) was fitted to be worked when necessary. On June 18, as the German Panzer divisions were approaching, the Commanding Officer was ordered to be ready to leave immediately for Casablanca or to scuttle the ship. It was not before the middle of the next night that the dredging work was finished with very narrow margins for the battleship to pass through, and in the early hours of 19 June, nearly in view of the German vanguard, the Jean Bart – barely 75% completed, her steam engines never having been worked before, and under the threat of German bombers – was taken out of her St. Nazaire's dock by four tugs and reached under her own steam Casablanca, Morocco, on June 22; the average speed on the journey's final leg was 22 knots (41 km/h; 25 mph).[173][144][174]Only one of her two 380 mm (15 in) main turrets had been installed by then; the second turret's guns had to be left or were lost with the sinking of the vessel shipping them. Her 152 mm (6.0 in) secondary battery was also not yet installed, and it was replaced by anti-aircraft machine guns. No rangefinder was fitted.[2] The Jean Bart, moored in Casablanca harbor, stayed uncompleted as facilities to complete her were completely lacking.[175]
On 8 November 1942, Allied landings in French North Africa (Operation Torch) begun. The Jean Bart, with her 380 mm (15 in) guns opened fire on the U.S. warships covering the landings, range finding being done using the shore stations of Sidi Abderhamane and Dar Bou Azza and the data sent by phone to the battleship.[176] But she was quickly silenced by the second hit from the 406 mm (16.0 in) guns of the USS Massachusetts, which jammed the turret rotating mechanism on the French battleship. The sixth of the seven 406 mm (16.0 in) shells which hit her exploded in a magazine of 152 mm (6.0 in) turret, which was empty as these turrets had not been installed. In normal war circumstances, this event would have had catastrophic consequences.[177] These magazines' armor weakness was known, and was intended to be corrected on the Gascogne. On November 10, her 380 mm (15 in) turret having been overhauled, Jean Bart almost hit the USS Augusta, the Task Force 34 flagship. Bombers from the aircraft carrier USS Ranger soon inflicted severe damage on her, two heavy bombs hitting the bow and the stern, and the battleship settled into the harbor mud with decks awash.[178][179]
Completion
After the French North Africa forces joined the Allies, Jean Bart was made seaworthy to be refitted with American help, as with the Richelieu. The French Admiralty's wish – presented by Vice Admiral Fenard, Chief of the French Naval Mission – to complete the Jean Bart in U.S. shipyards was discussed during 1943. But the U.S. Navy authorities concluded the task exceeded their capacities, for the ship was too different from the equivalent U.S. warships, and the correct parts were lacking.[180] Instead of completing her as designed, it was proposed in May 1943 to complete her with only one main artillery turret, using 340 mm (13 in) guns taken on the French battleship Lorraine that had joined the Allied forces (after she had stayed from 1940 to 1943 in Alexandria). Fifteen U.S.-built dual-purpose 127 mm (5.0 in) double turrets, sixteen Bofors 40 mm (1.6 in) quad mountings, numerous Oerlikon 20 mm (0.79 in) mountings, and aircraft installations for six planes (Grumman Avenger or Fairey Barracuda bombers and Hellcat or Seafire fighters), would have transformed the Jean Bart into a kind of hybrid battleship-aircraft carrier. A second proposal, less expensive but always with the same main artillery turret, had seventeen 127 mm (5.0 in) double turrets and twenty Bofors quad 40 mm (1.6 in) mountings and would have yielded a kind of AA battleship.[181] Admiral King, Commander in Chief, United States Fleet and Chief of Naval Operations, decided finally in March 1944 not to agree to any French proposals, and the Jean Bart stayed in Casablanca.[180][182]The question of the Jean Bart's completion was once more discussed by the French Admiralty in 1945. Was she to be scrapped? Completed as a classic battleship as designed? Transformed into an aircraft carrier? On 21 September 1945, the Higher Council of the French Navy agreed rapidly she was not to be scrapped. The discussion to choose between the other possibilities seems to have been rather unsatisfying. Mr. Louis Kahn, Chief Naval Constructor, French Navy, who had designed the Joffre-class aircraft carrier in the late 1930s,[183] presented a project for a transformation into an aircraft carrier operating forty/fifty-four planes, for a cost of 5 billion Francs, and with a delay of five years or less. Some admirals, namely Admiral Fenard, formerly chief of the French Naval Mission to the U.S.A., and Admiral Nomy, who had been a Naval Aviation pilot and would be later Chef d'Etat-major Général de la Marine (1951–1953), found surprising that so few planes were being accommodated on a ship with a displacement of 40,000 tonnes (39,000 long tons), as equivalent ships in other navies were operating twice as many planes. In the minutes of the 21 September 1945 meeting of the Navy Higher Council, Rear Admiral Barjot wrote: "The design of aircraft carrier presented to the Council is called, by a member, "caricature" in regard to a project which would be established with the wish to create an efficient aircraft carrier...Despite the war learnings, the outdated myth of big gun goes on dominating our naval doctrine...It was surprising enough to see in 1945 the Navy General Staff supporting, doctrinally, against the aircraft carrier solution, the battleship solution".[184][185]
It is known that the British aircraft carrier HMS Eagle, laid down in 1942 and launched in 1946, with a displacement of 38,600 long tons (39,200 t) (46,000 long tons (47,000 t) full load), was by then designed for accommodating 80 planes.[186] However, the French experience of a battleship converted into an aircraft carrier, the Béarn, was rather unsuccessful, her slow speed having led to use her only as aircraft transport ship.[187]
It was decided finally to complete Jean Bart as an integral battleship, with the aim to get, with a delay of five years, a command ship, heavily anti-aircraft armed, with a capacity of naval bombing for attack against land.[188] The Jean Bart left Casablanca in August 1945 to Cherbourg, where was, by then, the only usable French graving dock on the French Atlantic coast, and entered in one of the Brest Laninon docks in March 1946. Work progressed slowly as the Brest Navy Yards had to be rebuilt in the meantime after severe wartime destruction. The battleship emerged with a much more compact fore control tower, topped by only one rangefinder (Richelieu had two ones after her refit). In 1948, she received an additional bulge to limit the increase of her draught, due to the planned fitting of a stronger anti-aircraft artillery; her beam reached 35.5 meters (116 ft).[2] Gunnery and speed sea trials showed a top speed of more than 32 knots (59 km/h; 37 mph).[189]
Career
The Jean Bart was officially commissioned on 16 January 1949, but the anti-aircraft short range artillery, twelve 100 mm (3.9 in) dual mountings and fourteen Bofors licensed 57 mm (2.2 in) dual mountings, was not fitted before 1952–1953.[190]The Jean Bart was admitted to active service on 1 May 1955. She soon took the President of the French Republic in an official visit to Copenhagen, and went on to Oslo. In July, she took part (in New York) in ceremonies celebrating the 175th anniversary of the Newport landing of French troops led by the Comte de Rochambeau, during the American War of Independence.[170] On 21 October, in Toulon, the Jean Bart succeeded the Richelieu as the flagship of the South Group of Schools.[191]
During her active career, the Jean Bart had a complement of 750 to 900 men; 1500 had been planned. She reached more than 1200 men when she was about to be sent due to the Suez Canal crisis, but even then, only one 380 mm (15 in) turret and the axial 152 mm (6.0 in) turret could be manned.[192][193]
In 1956, she took part in the operations off Port-Saïd during the Suez Crisis, but the French bombing support of land operations was not primarily by the four shots fired by her 380 mm (15 in) guns against the land, but by the French Aeronavale Corsairs, and the Jean Bart's main operational contribution was to ship the 1st Foreign Parachute Regiment from Algiers to Cyprus.[192][194]
After having fired the last French Navy 380 mm (15 in) gun shots in July 1957, the Jean Bart was placed in reserve, on August 1, 1957, and served as a school ship for the gunnery training schools in Toulon. Afterwards, there were some proposals in 1957–1958 to modernize her anti-aircraft artillery with new 100 mm (3.9 in) turrets (Model 53 in place of Model 45), or later to transform her into a guided missile battleship as had been USS Mississippi (but no French-built missile existed at that time, so it was proposed to use the U.S. Terrier missile).[195] In 1964, when a command ship was looked for by the Pacific Center for Nuclear Experiments, the cruiser De Grasse was preferred to the Jean Bart, which would have been more expensive to transform.[196]
Decommissioned in 1968, the Jean Bart was scrapped in 1970 near Toulon,[197] leaving the Turkish Yavûz, formerly the SMS Goeben, the only survivor afloat in European waters of the battleship era.[198]
The Jean Bart was overall an experimental battleship, never fully operational, mainly because of budget cuts but also because, when the Jean Bart was completed, the battleship was no longer the capital ship for the French Navy, since instead three aircraft carriers – the Arromanches, La Fayette, and Bois Belleau – operated during the 1950s in bombing support against land in Indochina, in Algeria, and during the Suez Crisis. However, she was very useful post-war as a testbed for new French-built naval AA guns and radars.[197]
Clemenceau and Gascogne
The third unit, the Clemenceau, was laid down in the Salou graving dock as soon as the Richelieu had left it. Work progressed slowly, as the Clemenceau did not have priority in naval building unlike the first pair of the Richelieu class. Thus, in mid-1940 – nearly eighteen months later – she was only 10% completed as a hull section of 130 meters (430 ft). Taken by the Germans as a war booty, she was registered by the Kriegsmarine as Battleship R but the Germans never seriously considered continuation of construction work. Made buoyant, presumably in 1941, to vacate the building basin, moored near the submarine base,[199] or towed to Landevenec[200], and intended for use by the Germans as a blocking ship to seal off the harbour entrance, this uncompleted hull was sunk during a U.S. air raid at the beginning of the offensive to free Brest (on 27 August 1944) and scrapped post-war.[201] In the late 1950s, the name of Clemenceau was given to the first modern post-war French-built aircraft carrier, French aircraft carrier Clemenceau.[202]The fourth unit, the planned Gascogne, was intended to be laid down in the "Jean Bart dock" at Saint-Nazaire as soon as the Jean Bart would have freed the building dock to be transferred in the nearby fitting-out dock, which was done on 6 March 1940. But, when the ship building yard was occupied by the Germans, in June 1940, the battleship had not been yet formally ordered. No work was ever begun, as the keel was not laid down due to the German occupation. Just some stored parts and material would have been declared war booty and registered as Battleship S.[203]
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