Provence class battleships Provence and Bretagne will begin rebuilding in 1931. There will be improvements to deck protection, small bulges to support her increased deck armor, and improve her stability and underwater protection, a new secondary and AA battery, reshaping the bow, engine/boiler replacement, conversion from coal to oil firing, and increased fuel bunkerage. Her torpedo tubes and end belts will be removed. The rebuilding is expected to last about 15 months.
Upon completion of the Richelieu class, MN Lorraine will be converted to a gunnery training ship, and present training ship Courbet class battleship Jean Bart will be scrapped.
Provence class, French Battleship laid down 1912 (Engine 1931)
Displacement:
20,858 t light; 22,155 t standard; 25,342 t normal; 27,892 t full load
Dimensions: Length overall / water x beam x draught
547.90 ft / 547.90 ft x 92.85 ft (Bulges 96.13 ft) x 28.54 ft (normal load)
167.00 m / 167.00 m x 28.30 m (Bulges 29.30 m) x 8.70 m
Armament:
10 - 13.39" / 340 mm guns (5x2 guns), 1,322.77lbs / 600.00kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread, 2 raised mounts
12 - 4.72" / 120 mm guns (6x2 guns), 61.73lbs / 28.00kg shells, 1931 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread, 2 raised mounts
32 - 1.57" / 40.0 mm guns (8x4 guns), 1.95lbs / 0.88kg shells, 1931 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
6 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1931 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 14,031 lbs / 6,364 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.6" / 270 mm 331.36 ft / 101.00 m 12.47 ft / 3.80 m
Ends: Unarmoured
Main Belt covers 93 % of normal length
- Torpedo Bulkhead and Bulges:
1.57" / 40 mm 331.36 ft / 101.00 m 26.25 ft / 8.00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 7.87" / 200 mm 9.84" / 250 mm
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm 0.20" / 5 mm -
4th: 0.98" / 25 mm 0.20" / 5 mm -
- Armour deck: 5.12" / 130 mm, Conning tower: 12.40" / 315 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 46,207 shp / 34,470 Kw = 23.00 kts
Range 9,000nm at 18.00 kts
Bunker at max displacement = 5,736 tons
Complement:
1,003 - 1,305
Cost:
£2.256 million / $9.023 million
Distribution of weights at normal displacement:
Armament: 1,586 tons, 6.3 %
Armour: 8,601 tons, 33.9 %
- Belts: 1,974 tons, 7.8 %
- Torpedo bulkhead: 507 tons, 2.0 %
- Armament: 2,400 tons, 9.5 %
- Armour Deck: 3,490 tons, 13.8 %
- Conning Tower: 231 tons, 0.9 %
Machinery: 1,382 tons, 5.5 %
Hull, fittings & equipment: 9,239 tons, 36.5 %
Fuel, ammunition & stores: 4,484 tons, 17.7 %
Miscellaneous weights: 50 tons, 0.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
34,047 lbs / 15,443 Kg = 28.4 x 13.4 " / 340 mm shells or 6.2 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 5.7 ft / 1.7 m
Roll period: 16.9 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.53
Seaboat quality (Average = 1.00): 1.07
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.590
Length to Beam Ratio: 5.70 : 1
'Natural speed' for length: 23.41 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27.89 ft / 8.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (50 %): 19.69 ft / 6.00 m (12.47 ft / 3.80 m aft of break)
- Quarterdeck (15 %): 12.47 ft / 3.80 m
- Stern: 12.47 ft / 3.80 m
- Average freeboard: 16.73 ft / 5.10 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.7 %
- Above water (accommodation/working, high = better): 110.6 %
Waterplane Area: 36,860 Square feet or 3,424 Square metres
Displacement factor (Displacement / loading): 105 %
Structure weight / hull surface area: 183 lbs/sq ft or 895 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.60
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Here are her original statistics:
Provence Class Battleship, laid down 1912
Length, 167.0 m x Beam, 28.3 m x Depth, 8.7 m
24458 tonnes normal displacement (23407 tonnes standard)
Main battery: 10 x 34.0-cm (5 x 2; 2 superfiring)
Secondary battery: 22 x 14.0-cm
QF battery: 7 x 10.0-cm
Light battery: 6 x 4.5-cm
Weight of broadside: 6393 kg
4 TT, 45.0 cm (submerged)
Main belt, 27.0 cm; bow and stern, 18.0 cm
Torpedo bulkhead, 6.0 cm
Armor deck, average 5.8 cm
Conning tower, 31.5 cm
Battery armor:
Main, 40.0 cm / secondary, 10.0 cm
QF, 2.5 cm shields
Maximum speed for 19569 shaft kw = 20.00 knots
Approximate cruising radius, 5500 nm / 10 knots
Typical complement: 978-1271
Estimated cost, $9.596 million (£2.399 million)
Remarks:
Relative extent of belt armor, 94 percent of 'typical' coverage.
Main deck secondary guns subject to being washed down
in a seaway.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 1758 tonnes = 7 pct
Armor, total ..................... 9147 tonnes = 37 pct
Belt 2346 tonnes = 10 pct
Torpedo bulkhead 888 tonnes = 4 pct
Deck 1508 tonnes = 6 pct
C.T. 226 tonnes = 1 pct
Armament 4179 tonnes = 17 pct
Machinery ........................ 1150 tonnes = 5 pct
Hull and fittings; equipment ..... 9665 tonnes = 40 pct
Fuel, ammunition, stores ......... 2713 tonnes = 11 pct
Miscellaneous weights ............ 25 tonnes = 0 pct
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24458 tonnes = 100 pct
Estimated metacentric height, 1.4 m
Displacement summary:
Light ship: 21745 tonnes
Standard displacement: 23407 tonnes
Normal service: 24458 tonnes
Full load: 25202 tonnes
Loading submergence 3346 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.01
Shellfire needed to sink: 9899 kg = 18.2 x 34.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 3.6
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 52 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.60
Relative quality as a seaboat: 1.12
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Hull form characteristics:
Block coefficient: 0.59
Sharpness coefficient: 0.43
Hull speed coefficient 'M' = 5.77
'Natural speed' for length = 23.4 knots
Power going to wave formation
at top speed: 44 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 93 percent
Relative accommodation and working space: 109 percent
Displacement factor: 96 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.99
(Structure weight per square
metre of hull surface: 969 kg)
Relative longitudinal hull strength: 1.37
(for 4.80 m average freeboard;
freeboard adjustment -0.72 m)
Relative composite hull strength: 1.03
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[Machine-readable parameters: Spring Style v. 1.2.1]
547.76 x 92.82 x 28.54; 15.74 -- Dimensions
0.59 -- Block coefficient
1912 -- Year laid down
20.00 / 5500 / 10.00; Turbine, coal fired -- Speed / radius / cruise
25 tons -- Miscellaneous weights
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10 x 13.39; 5; 2 -- Main battery; turrets; superfiring
:
22 x 5.51; 0 -- Secondary battery; turrets
Main deck battery
:
7 x 3.94 -- Tertiary (QF/AA) battery
Gun-shields
:
6 x 1.77 -- Fourth (light) battery
4 / 4 / 17.72 -- TT / submerged / size
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10.63 / 7.09 / 0.00 / 2.36; 94 -- Belt armor; relative extent
2.28 / 12.40 -- Deck / CT
15.75 / 3.94 / 0.98 / 0.00 -- Battery armor
(Note: For portability, values are stored in Anglo-American units)
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