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Mogami class heavy cruiser (1941)

Published: Feb 16, 2017

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Description

suzuya as she appeared on the 24 september 1941

Displacement:
8,388 t light; 8,783 t standard; 10,517 t normal; 11,967 t full load

Dimensions: Length overall / water x beam x draught
633.46 ft / 629.00 ft x 56.00 ft x 19.00 ft (normal load)
193.08 m / 191.72 m x 17.07 m x 5.79 m

Armament:
8 - 8.00" / 203 mm guns (4x2 guns), 256.00lbs / 116.12kg shells, 1924 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
Main guns limited to end-on fire
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
12- 0.98" / 25.0 mm guns (2x6 guns), 1.95lbs / 0.89kg shells, 1936 Model
Anti-aircraft guns in deck mounts
Weight of broadside 2,186 lbs / 991 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 477.00 ft / 145.39 m 14.00 ft / 4.27 m
Ends: Unarmoured
Main Belt covers 117 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 1.00" / 25 mm 3.00" / 76 mm

- Armour deck: 1.50" / 38 mm, Conning tower: 4.00" / 102 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 101,395 shp / 75,641 Kw = 33.37 kts
Range 8,205nm at 18.00 kts
Bunker at max displacement = 3,121 tons

Complement:
519 - 675

Cost:
£3.041 million / $12.165 million

Distribution of weights at normal displacement:
Armament: 273 tons, 2.6 %
Armour: 2,072 tons, 19.7 %
- Belts: 1,064 tons, 10.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 285 tons, 2.7 %
- Armour Deck: 682 tons, 6.5 %
- Conning Tower: 41 tons, 0.4 %
Machinery: 3,292 tons, 31.3 %
Hull, fittings & equipment: 2,750 tons, 26.2 %
Fuel, ammunition & stores: 2,129 tons, 20.2 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,139 lbs / 2,785 Kg = 24.0 x 8.0 " / 203 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 3.2 ft / 1.0 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 92 %
- Recoil effect (Restricted arc if above 1.00): 1.01
Seaboat quality (Average = 1.00): 1.85

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 11.23 : 1
'Natural speed' for length: 25.08 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: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.00 ft / 6.40 m
- Forecastle (20 %): 26.00 ft / 7.92 m
- Mid (50 %): 26.00 ft / 7.92 m
- Quarterdeck (15 %): 26.00 ft / 7.92 m
- Stern: 23.00 ft / 7.01 m
- Average freeboard: 25.38 ft / 7.73 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.6 %
- Above water (accommodation/working, high = better): 234.6 %
Waterplane Area: 24,582 Square feet or 2,284 Square metres
Displacement factor (Displacement / loading): 97 %
Structure weight / hull surface area: 57 lbs/sq ft or 279 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.43
- Overall: 0.56
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Image size

1336x364px 34.39 KB

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