Kurama, japanese battlecruiser laid down 1905 (Engine 1907)
Displacement:
13 060 t light; 13 739 t standard; 14 930 t normal; 15 883 t full load
Dimensions: Length overall / water x beam x draught
484,67 ft / 479,79 ft x 75,49 ft x 26,21 ft (normal load)
147,73 m / 146,24 m x 23,01 m x 7,99 m
Armament:
4 - 12,01" / 305 mm guns (2x2 guns), 865,70lbs / 392,68kg shells, 1905 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
2 - 12,01" / 305 mm guns (1x2 guns), 865,70lbs / 392,68kg shells, 1905 Model
Breech loading guns in a turret (on a barbette)
on centreline amidships
12 - 5,98" / 152 mm guns in single mounts, 107,15lbs / 48,60kg shells, 1905 Model
Quick firing guns in casemate mounts
on side, all amidships
8 - 4,72" / 120 mm guns in single mounts, 52,72lbs / 23,92kg shells, 1905 Model
Quick firing guns in casemate mounts
on side, evenly spread
4 - 4,72" / 120 mm guns in single mounts, 52,72lbs / 23,92kg shells, 1905 Model
Breech loading guns in deck mounts with hoists
on side, all amidships
Weight of broadside 7 113 lbs / 3 226 kg
Shells per gun, main battery: 90
3 - 18,0" / 457 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7,01" / 178 mm 291,77 ft / 88,93 m 7,81 ft / 2,38 m
Ends: 4,02" / 102 mm 188,02 ft / 57,31 m 7,81 ft / 2,38 m
Upper: 5,00" / 127 mm 228,97 ft / 69,79 m 7,81 ft / 2,38 m
Main Belt covers 94% of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
0,98" / 25 mm 291,77 ft / 88,93 m 14,99 ft / 4,57 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9,02" / 229 mm 5,98" / 152 mm 4,92" / 125 mm
2nd: 9,02" / 229 mm 5,98" / 152 mm 4,92" / 125 mm
3rd: 5,00" / 127 mm - -
4th: 5,00" / 127 mm - -
5th: 0,98" / 25 mm - -
- Armour deck: 1,50" / 38 mm, Conning tower: 7,99" / 203 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Hydraulic drive, 2 shafts, 31 025 ihp / 23 145 Kw = 22,50 kts
Range 5 000nm at 12,00 kts
Bunker at max displacement = 2 143 tons (100% coal)
Complement:
674 - 877
Cost:
£1,687 million / $6,746 million
Distribution of weights at normal displacement:
Armament: 889 tons, 6,0%
Armour: 3 345 tons, 22,4%
- Belts: 1 347 tons, 9,0%
- Torpedo bulkhead: 159 tons, 1,1%
- Armament: 1 034 tons, 6,9%
- Armour Deck: 700 tons, 4,7%
- Conning Tower: 104 tons, 0,7%
Machinery: 3 447 tons, 23,1%
Hull, fittings & equipment: 5 380 tons, 36,0%
Fuel, ammunition & stores: 1 870 tons, 12,5%
Miscellaneous weights: 0 tons, 0,0%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9 852 lbs / 4 469 Kg = 11,4 x 12,0 " / 305 mm shells or 1,6 torpedoes
Stability (Unstable if below 1.00): 1,23
Metacentric height 4,8 ft / 1,5 m
Roll period: 14,5 seconds
Steadiness - As gun platform (Average = 50 %): 65 %
- Recoil effect (Restricted arc if above 1.00): 0,54
Seaboat quality (Average = 1.00): 1,30
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0,550
Length to Beam Ratio: 6,36 : 1
'Natural speed' for length: 21,90 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 11,60 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23,79 ft / 7,25 m
- Forecastle (20%): 25,43 ft / 7,75 m (16,50 ft / 5,03 m aft of break)
- Mid (35%): 16,50 ft / 5,03 m
- Quarterdeck (15%): 16,50 ft / 5,03 m
- Stern: 16,50 ft / 5,03 m
- Average freeboard: 18,16 ft / 5,53 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 167,0%
- Above water (accommodation/working, high = better): 117,9%
Waterplane Area: 25 286 Square feet or 2 349 Square metres
Displacement factor (Displacement / loading): 86%
Structure weight / hull surface area: 143 lbs/sq ft or 700 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,93
- Longitudinal: 1,93
- Overall: 1,00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily
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