[SIZE=3]Jean Bart class, French croiseurs lourds laid down 1942[/SIZE]
Displacement:
17,250 t light; 18,139 t standard; 21,210 t normal; 23,667 t full load
Dimensions: Length overall / water x beam x draught
738.83 ft / 721.78 ft x 72.18 ft x 25.92 ft (normal load)
225.20 m / 220.00 m x 22.00 m x 7.90 m
Armament:
9 - 9.45" / 240 mm guns (3x3 guns), 551.16lbs / 250.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 3.94" / 100 mm guns (2x2 guns), 35.27lbs / 16.00kg shells, 1942 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
8 - 3.94" / 100 mm guns (4x2 guns), 35.27lbs / 16.00kg shells, 1942 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
24 - 1.57" / 40.0 mm guns (6x4 guns), 1.95lbs / 0.89kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
18 - 0.79" / 20.0 mm guns (9x2 guns), 0.24lbs / 0.11kg shells, 1942 Model
Machine guns in deck mount
on side, all raised guns
Weight of broadside 5,435 lbs / 2,465 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.10" / 155 mm 459.32 ft / 140.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 98 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.27" / 210 mm 5.91" / 150 mm 6.30" / 160 mm
2nd: 1.18" / 30 mm 0.59" / 15 mm 0.59" / 15 mm
3rd: 1.18" / 30 mm 0.59" / 15 mm 0.59" / 15 mm
4th: 0.59" / 15 mm - -
5th: 0.59" / 15 mm - -
- Armour deck: 2.76" / 70 mm, Conning tower: 5.91" / 150 mm
Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 4 shafts, 141,355 shp / 105,451 Kw = 34.00 kts
Range 12,000nm at 18.00 kts
Bunker at max displacement = 5,527 tons
Complement:
878 - 1,142
Cost:
£9.947 million / $39.789 million
Distribution of weights at normal displacement:
Armament: 527 tons, 2.5 %
Armour: 4,351 tons, 20.5 %
- Belts: 1,347 tons, 6.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 977 tons, 4.6 %
- Armour Deck: 1,929 tons, 9.1 %
- Conning Tower: 97 tons, 0.5 %
Machinery: 3,693 tons, 17.4 %
Hull, fittings & equipment: 8,305 tons, 39.2 %
Fuel, ammunition & stores: 3,960 tons, 18.7 %
Miscellaneous weights: 375 tons, 1.8 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
31,171 lbs / 14,139 Kg = 73.9 x 9.4 " / 240 mm shells or 2.8 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 3.8 ft / 1.2 m
Roll period: 15.6 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0.78
Seaboat quality (Average = 1.00): 1.09
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 30.49 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.53 ft / 9.00 m
- Forecastle (20 %): 25.75 ft / 7.85 m
- Mid (50 %): 22.64 ft / 6.90 m
- Quarterdeck (15 %): 22.64 ft / 6.90 m
- Stern: 22.64 ft / 6.90 m
- Average freeboard: 24.03 ft / 7.32 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78.8 %
- Above water (accommodation/working, high = better): 191.8 %
Waterplane Area: 37,844 Square feet or 3,516 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 140 lbs/sq ft or 683 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.41
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Breakdown of Miscellaneous Weights:
- 100 tons for 4x LeO-400 seaplanes
- 15 tons for catapult and crane
- 50 tons for crew comforts (air conditioning, movie theatre, and ice cream machine)
- 110 tons for Electronics Suite
- 25 tons for electronic fire-control on 240mm, 100mm, and 40mm guns
- 50 tons for communications
- 25 tons for extra damage-control gear, pumps, etc
Total extra weight: 375 tons
Ships in Class:
- Jean Bart
- Jeanne d'Arc