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space-joe — Chikuma class large cruiser (1954)
Published: 2016-10-27 19:19:49 +0000 UTC; Views: 484; Favourites: 2; Downloads: 3
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Description
chikuma as of 12 November 1954.Displacement:
26,190 t light; 27,349 t standard; 30,397 t normal; 32,840 t full load
Dimensions: Length overall / water x beam x draught
822.42 ft / 806.50 ft x 87.20 ft x 30.50 ft (normal load)
250.67 m / 245.82 m x 26.58 m x 9.30 m
Armament:
12 - 10.00" / 254 mm guns (3x4), 500.00lbs / 226.80kg shells, 1933 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 3 raised guns - superfiring
8 - 5.00" / 127 mm guns (2x4 guns), 62.50lbs / 28.35kg shells, 1932 Model
Breech loading guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
8- 1.57" / 40.0 mm guns (2x4 guns), 1.95lbs / 0.89kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 6,508 lbs / 2,952 kg
Shells per gun, main battery: 400
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.00" / 203 mm 423.45 ft / 129.07 m 11.12 ft / 3.39 m
Ends: 3.00" / 76 mm 190.19 ft / 57.97 m 11.12 ft / 3.39 m
192.86 ft / 58.78 m Unarmoured ends
Main Belt covers 81 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.1" / 282 mm 7.00" / 178 mm 10.0" / 254 mm
2nd: 4.00" / 102 mm 1.00" / 25 mm -
3rd: 1.50" / 38 mm - -
- Armour deck: 6.00" / 152 mm, Conning tower: 12.00" / 305 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 0 shafts, 139,765 shp / 104,265 Kw = 31.42 kts
Range 11,000nm at 17.00 kts
Bunker at max displacement = 5,486 tons
Caution: Too much power for number of propellor shafts
Complement:
1,154 - 1,515
Cost:
£16.169 million / $64.675 million
Distribution of weights at normal displacement:
Armament: 813 tons, 2.7 %
Armour: 8,649 tons, 28.5 %
- Belts: 1,873 tons, 6.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1,546 tons, 5.1 %
- Armour Deck: 4,978 tons, 16.4 %
- Conning Tower: 252 tons, 0.8 %
Machinery: 3,344 tons, 11.0 %
Hull, fittings & equipment: 13,385 tons, 44.0 %
Fuel, ammunition & stores: 4,207 tons, 13.8 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
53,635 lbs / 24,328 Kg = 107.3 x 10.0 " / 254 mm shells or 4.9 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 4.8 ft / 1.5 m
Roll period: 16.7 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.52
Seaboat quality (Average = 1.00): 1.31
Hull form characteristics:
Hull has low forecastle
Block coefficient: 0.496
Length to Beam Ratio: 9.25 : 1
'Natural speed' for length: 28.40 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 55
Bow angle (Positive = bow angles forward): 21.00 degrees
Stern overhang: 4.40 ft / 1.34 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (21 %): 24.30 ft / 7.41 m (24.90 ft / 7.59 m aft of break)
- Mid (50 %): 21.50 ft / 6.55 m
- Quarterdeck (20 %): 21.50 ft / 6.55 m
- Stern: 21.50 ft / 6.55 m
- Average freeboard: 23.06 ft / 7.03 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 57.4 %
- Above water (accommodation/working, high = better): 165.9 %
Waterplane Area: 44,845 Square feet or 4,166 Square metres
Displacement factor (Displacement / loading): 139 %
Structure weight / hull surface area: 189 lbs/sq ft or 922 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.19
- Longitudinal: 1.46
- Overall: 1.22
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
