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France class battleships
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MN France and MN Republique are owerful new battleships laid down in 1924.  They are a response both to the sinking of MN France on 22 August 1922, and the approaching completion of the Italian battleship MM Pisa.

MN France and MN Republique

France class, French Battleships laid down 1924

Displacement:
36,679 t light; 38,956 t standard; 43,018 t normal; 46,269 t full load

Dimensions: Length overall / water x beam x draught
773.25 ft / 767.72 ft x 108.92 ft x 32.15 ft (normal load)
235.69 m / 234.00 m x 33.20 m x 9.80 m

Armament:
12 - 15.00" / 381 mm guns (4x3 guns), 2,039.28lbs / 925.00kg shells, 1924 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 4.72" / 120 mm guns (6x2 guns), 61.73lbs / 28.00kg shells, 1924 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
40 - 1.57" / 40.0 mm guns (10x4 guns), 1.95lbs / 0.88kg shells, 1924 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 25,290 lbs / 11,471 kg
Shells per gun, main battery: 100

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.2" / 360 mm 438.16 ft / 133.55 m 11.81 ft / 3.60 m
Ends: Unarmoured
Main Belt covers 88 % of normal length

- Torpedo Bulkhead:
1.18" / 30 mm 438.16 ft / 133.55 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 11.8" / 300 mm
2nd: 0.98" / 25 mm - -
3rd: 0.98" / 25 mm - -

- Armour deck: 5.51" / 140 mm, Conning tower: 15.75" / 400 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 99,572 shp / 74,281 Kw = 26.75 kts
Range 12,400nm at 15.00 kts (Bunkerage = 7,313 tons)

Other facilities:
MN France: Fleet Command Brigde

Mn Republique: 4 Seaplanes, 2 Catapults

Complement:
1,493 - 1,941

Cost:
12.190 million / $48.760 million

Distribution of weights at normal displacement:
Armament: 2,620 tons, 6.1 %
Armour: 13,225 tons, 30.7 %
- Belts: 3,258 tons, 7.6 %
- Torpedo bulkhead: 503 tons, 1.2 %
- Armament: 3,040 tons, 7.1 %
- Armour Deck: 6,007 tons, 14.0 %
- Conning Tower: 417 tons, 1.0 %
Machinery: 3,280 tons, 7.6 %
Hull, fittings & equipment: 17,454 tons, 40.6 %
Fuel, ammunition & stores: 6,339 tons, 14.7 %
Miscellaneous weights: 100 tons, 0.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
41,684 lbs / 18,907 Kg = 24.7 x 15.0 " / 381 mm shells or 5.9 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 5.9 ft / 1.8 m
Roll period: 18.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.81
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
Block coefficient: 0.560
Length to Beam Ratio: 7.05 : 1
'Natural speed' for length: 27.71 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.67 ft / 6.30 m
- Forecastle (21 %): 20.67 ft / 6.30 m (17.72 ft / 5.40 m aft of break)
- Mid (80 %): 17.72 ft / 5.40 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (20 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 17.43 ft / 5.31 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 87.8 %
- Above water (accommodation/working, high = better): 133.2 %
Waterplane Area: 58,909 Square feet or 5,473 Square metres
Displacement factor (Displacement / loading): 105 %
Structure weight / hull surface area: 224 lbs/sq ft or 1,094 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.11
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform


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