F/CA/1917, France Armoured Cruiser laid down 1917 (Engine 1927)
Displacement:
15,142 t light; 15,884 t standard; 16,962 t normal; 17,825 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(703.59 ft / 694.00 ft) x 74.00 ft x (20.00 / 20.82 ft)
(214.45 m / 211.53 m) x 22.56 m x (6.10 / 6.35 m)
Armament:
8 - 9.40" / 239 mm 55.0 cal guns - 449.00lbs / 203.66kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1917 Model
2 x Quad mounts on centreline, forward deck forward
1 raised mount - superfiring
12 - 5.50" / 140 mm 55.0 cal guns - 90.00lbs / 40.82kg shells, 150 per gun
Quick firing guns in turret on barbette mounts, 1917 Model
4 x Triple mounts on sides, aft deck forward
8 - 3.40" / 86.4 mm 50.0 cal guns - 20.80lbs / 9.44kg shells, 150 per gun
Anti-air guns in deck and hoist mounts, 1917 Model
4 x Twin mounts on sides, aft deck aft
4 raised mounts
Weight of broadside 4,838 lbs / 2,195 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 450.00 ft / 137.16 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.00" / 25 mm 450.00 ft / 137.16 m 19.00 ft / 5.79 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 3.00" / 76 mm 4.00" / 102 mm
2nd: 3.00" / 76 mm 3.00" / 76 mm 3.00" / 76 mm
- Box over magazines: 3.00" / 76 mm
- Conning towers: Forward 6.00" / 152 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 130,832 shp / 97,601 Kw = 33.00 kts
Range 5,600nm at 15.00 kts
Bunker at max displacement = 1,940 tons
Complement:
743 - 966
Cost:
£3.021 million / $12.082 million
Distribution of weights at normal displacement:
Armament: 1,320 tons, 7.8 %
Armour: 2,527 tons, 14.9 %
- Belts: 1,345 tons, 7.9 %
- Torpedo bulkhead: 316 tons, 1.9 %
- Armament: 657 tons, 3.9 %
- Armour Deck: 123 tons, 0.7 %
- Conning Tower: 85 tons, 0.5 %
Machinery: 4,130 tons, 24.3 %
Hull, fittings & equipment: 7,165 tons, 42.2 %
Fuel, ammunition & stores: 1,820 tons, 10.7 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
18,873 lbs / 8,561 Kg = 45.4 x 9.4 " / 239 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 4.0 ft / 1.2 m
Roll period: 15.5 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.71
Seaboat quality (Average = 1.00): 1.06
Hull form characteristics:
Hull has rise forward of midbreak,
an extended bulbous bow and a cruiser stern
Block coefficient (normal/deep): 0.578 / 0.583
Length to Beam Ratio: 9.38 : 1
'Natural speed' for length: 26.34 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 3.00 ft / 0.91 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 27.00 %, 31.00 ft / 9.45 m, 27.00 ft / 8.23 m
- Forward deck: 36.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m
- Aft deck: 21.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m
- Quarter deck: 16.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m
- Average freeboard: 24.47 ft / 7.46 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 149.1 %
- Above water (accommodation/working, high = better): 226.9 %
Waterplane Area: 36,795 Square feet or 3,418 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 141 lbs/sq ft or 690 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.34
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
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Monday, July 02, 2007
My concept for a fast French armoured cruiser
I have had this concept for a fast armoured cruiser with two turrets forward. I usually cast it as a French ship. This version has 8-9.4in/55 BLR, 12-5.5in/55, and 8-3.4in AA guns. With armour basis is 6in with a 3in deck. This is the Springsharp report:
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