źródło: http://xoomer.virgilio.it/bk/NWS/Imperial_Japanese_Navy/images/IJNAACruiser2.jpg
Sendai, Japan AA cruiser laid down 1943 (Engine 1944)
Displacement:
6 819 t light; 7 130 t standard; 8 284 t normal; 9 206 t full load
Dimensions: Length overall / water x beam x draught
571,78 ft / 564,30 ft x 51,84 ft x 18,70 ft (normal load)
174,28 m / 172,00 m x 15,80 m x 5,70 m
Armament:
12 - 3,94" / 100 mm guns (6x2 guns), 30,51lbs / 13,84kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
12 - 3,94" / 100 mm guns (6x2 guns), 30,51lbs / 13,84kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
48 - 0,98" / 25,0 mm guns (16x3 guns), 0,48lbs / 0,22kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 755 lbs / 343 kg
Shells per gun, main battery: 300
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2,17" / 55 mm 282,15 ft / 86,00 m 11,81 ft / 3,60 m
Ends: Unarmoured
Main Belt covers 77% of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1,18" / 30 mm 436,35 ft / 133,00 m 16,40 ft / 5,00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,97" / 50 mm - -
2nd: 1,97" / 50 mm - -
- Armour deck: 1,38" / 35 mm, Conning tower: 4,72" / 120 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 98 453 shp / 73 446 Kw = 34,00 kts
Range 7 500nm at 18,00 kts
Bunker at max displacement = 2 076 tons
Complement:
433 - 564
Cost:
£4,385 million / $17,540 million
Distribution of weights at normal displacement:
Armament: 94 tons, 1,1%
Armour: 1 261 tons, 15,2%
- Belts: 310 tons, 3,7%
- Torpedo bulkhead: 313 tons, 3,8%
- Armament: 86 tons, 1,0%
- Armour Deck: 511 tons, 6,2%
- Conning Tower: 42 tons, 0,5%
Machinery: 2 514 tons, 30,4%
Hull, fittings & equipment: 2 950 tons, 35,6%
Fuel, ammunition & stores: 1 464 tons, 17,7%
Miscellaneous weights: 0 tons, 0,0%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9 180 lbs / 4 164 Kg = 300,9 x 3,9 " / 100 mm shells or 1,4 torpedoes
Stability (Unstable if below 1.00): 1,36
Metacentric height 3,2 ft / 1,0 m
Roll period: 12,2 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0,23
Seaboat quality (Average = 1.00): 1,03
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,530
Length to Beam Ratio: 10,89 : 1
'Natural speed' for length: 23,76 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27,89 ft / 8,50 m
- Forecastle (20%): 19,69 ft / 6,00 m
- Mid (50%): 17,72 ft / 5,40 m
- Quarterdeck (15%): 17,72 ft / 5,40 m
- Stern: 17,72 ft / 5,40 m
- Average freeboard: 19,06 ft / 5,81 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 176,8%
- Above water (accommodation/working, high = better): 160,2%
Waterplane Area: 20 037 Square feet or 1 861 Square metres
Displacement factor (Displacement / loading): 118%
Structure weight / hull surface area: 86 lbs/sq ft or 418 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,96
- Longitudinal: 1,39
- Overall: 1,00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
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