Tange - Class
Light Cruiser
as laid down
Displacement:
7,631 t light; 7,948 t standard; 8,589 t normal; 9,101 t full load
Dimensions:
Length overall / water x beam x draught
606.98 ft / 600.00 ft x 60.00 ft x 16.70 ft (normal load)
185.01 m / 182.88 m x 18.29 m x 5.09 m
Armament:
12 - 5.91" / 150 mm guns (4x3 guns), 110.00lbs / 49.90kg shells, 1921 Model
Quick firing guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 4.13" / 105 mm guns (4x2 guns), 36.00lbs / 16.33kg shells, 1921 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
16 - 1.57" / 40.0 mm guns (8x2 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
18 - 0.98" / 25.0 mm guns (6x3 guns), 0.57lbs / 0.26kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 1,650 lbs / 749 kg
Shells per gun, main battery: 150
8 - 24.0" / 609.6 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 437.00 ft / 133.20 m 9.30 ft / 2.83 m
Ends: Unarmoured
Main Belt covers 112 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 3.00" / 76 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -
- Armour deck: 1.00" / 25 mm, Conning tower: 3.00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 76,713 shp / 57,228 Kw = 32.00 kts
Range 5,000nm at 15.00 kts (Bunkerage = 1,152 tons)
Complement:
445 - 579
Cost:
£2.551 million / $10.203 million
Distribution of weights at normal displacement:
Armament: 195 tons, 2.3 %
Armour: 1,249 tons, 14.5 %
- Belts: 499 tons, 5.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 280 tons, 3.3 %
- Armour Deck: 444 tons, 5.2 %
- Conning Tower: 27 tons, 0.3 %
Machinery: 2,491 tons, 29.0 %
Hull, fittings & equipment: 3,626 tons, 42.18 %
Fuel, ammunition & stores: 958 tons, 11.2 %
Miscellaneous weights: 70 tons, 0.82 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,629 lbs / 3,914 Kg = 83.8 x 5.9 " / 150 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.9 ft / 0.9 m
Roll period: 14.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 24.49 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 14.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (20 %): 17.50 ft / 5.33 m
- Mid (50 %): 17.30 ft / 5.27 m
- Quarterdeck (15 %): 17.30 ft / 5.27 m
- Stern: 17.30 ft / 5.27 m
- Average freeboard: 18.21 ft / 5.55 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 111.9 %
- Above water (accommodation/working, high = better): 142.5 %
Waterplane Area: 23,986 Square feet or 2,228 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 102 lbs/sq ft or 500 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.07
- Overall: 1.00
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
------------
as refitted
Displacement:
7.533 t light; 7.948 t standard; 8.589 t normal; 9.101 t full load
Dimensions:
Length overall / water x beam x draught
606,98 ft / 600,00 ft x 60,00 ft x 16,70 ft (normal load)
185,01 m / 182,88 m x 18,29 m x 5,09 m
Armament:
12 - 5,91" / 150 mm guns (4x3 guns), 110,00lbs / 49,90kg shells, 1921 Model
Quick firing guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 4,13" / 105 mm guns (6x2 guns), 36,00lbs / 16,33kg shells, 1921 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
32 - 1,57" / 40,0 mm guns (16x2 guns), 1,95lbs / 0,88kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 8 raised mounts
36 - 0,98" / 25,0 mm guns (18x2 guns), 0,48lbs / 0,22kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 1.832 lbs / 831 kg
Shells per gun, main battery: 220
8 - 24,0" / 609,6 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2,99" / 76 mm 444,55 ft / 135,50 m 9,28 ft / 2,83 m
Ends: Unarmoured
Main Belt covers 114% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4,02" / 102 mm 2,99" / 76 mm 2,01" / 51 mm
2nd: 2,01" / 51 mm 0,98" / 25 mm 2,01" / 51 mm
3rd: 0,98" / 25 mm - -
4th: 0,98" / 25 mm - -
- Armour deck: 0,98" / 25 mm, Conning tower: 2,99" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 67.557 shp / 50.397 Kw = 31,00 kts
Range 5.000nm at 15,00 kts
Bunker at max displacement = 1.152 tons
Complement:
445 - 579
Cost:
£2,466 million / $9,862 million
Distribution of weights at normal displacement:
Armament: 217 tons, 2,5%
Armour: 1.272 tons, 14,8%
- Belts: 504 tons, 5,9%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 304 tons, 3,5%
- Armour Deck: 437 tons, 5,1%
- Conning Tower: 27 tons, 0,3%
Machinery: 2.193 tons, 25,5%
Hull, fittings & equipment: 3.750 tons, 43,7%
Fuel, ammunition & stores: 1.056 tons, 12,3%
Miscellaneous weights: 100 tons, 1,2%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10.267 lbs / 4.657 Kg = 99,7 x 5,9 " / 150 mm shells or 1,4 torpedoes
Stability (Unstable if below 1.00): 1,23
Metacentric height 3,4 ft / 1,0 m
Roll period: 13,7 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0,44
Seaboat quality (Average = 1.00): 1,08
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,500
Length to Beam Ratio: 10,00 : 1
'Natural speed' for length: 24,49 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 14,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28,00 ft / 8,53 m
- Forecastle (20%): 17,50 ft / 5,33 m
- Mid (50%): 17,30 ft / 5,27 m
- Quarterdeck (15%): 17,30 ft / 5,27 m
- Stern: 17,30 ft / 5,27 m
- Average freeboard: 18,21 ft / 5,55 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 105,1%
- Above water (accommodation/working, high = better): 142,5%
Waterplane Area: 23.986 Square feet or 2.228 Square metres
Displacement factor (Displacement / loading): 115%
Structure weight / hull surface area: 104 lbs/sq ft or 507 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,99
- Longitudinal: 1,08
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Breakdown of Miscellaneous Weight:
- 25 tons for degaussing system
- 25 tons for radar equipment
- 25 tons for catapult
- 25 tons for aircraft
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Ships in Class:
HICMS Horie; laid down 1925, refitted 1939
HICMS Iwao; laid down 1925, refitted 1939