Battlecruisers

[Desertfox]

Order of Battle

Tsukuba class (1905)
Tsukuba, DMG 50%, RECLASSIFIED
Ikoma, DMG 50%, RECLASSIFIED

Ibuki class (1906)
Ibuki, SUNK 1912
Kuruma, SUNK 1912

Maya class (1913)
Maya
Chokai

Atago class (1915)
Atago
Takao

Kongo class (1917)
Kongo
Hiei

Kirishima class (1920)
Kirishima, UNDER CONSTRUCTION
Haruna, UNDER CONSTRUCTION

[Desertfox]

Tsukuba, RECLASSIFIED AS BATTLESHIPS
Ikoma, RECLASSIFIED AS BATTLESHIPS

[Desertfox]

Ibuki, SUNK 1912
Kuruma, SUNK 1912

[Desertfox]

Maya, Chokai. Uses the Kongo-class layout.



Maya class, Japan Battlecruiser laid down 1913

Displacement:
   15,994 t light; 16,994 t standard; 18,697 t normal; 20,060 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (594.76 ft / 590.00 ft) x 79.00 ft x (27.00 / 28.51 ft)
   (181.28 m / 179.83 m) x 24.08 m  x (8.23 / 8.69 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 140 per gun
     Breech loading guns in turret on barbette mounts, 1913 Model
     4 x Twin mounts on centreline, evenly spread
      2 raised mounts
      10 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 150 per gun
     Quick firing guns in casemate mounts, 1913 Model
     10 x Single mounts on sides, evenly spread
      4 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 150 per gun
     Quick firing guns in deck mounts, 1913 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      10 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 140 per gun
     Quick firing guns in deck mounts, 1913 Model
     10 x Single mounts on sides, evenly spread
      6 raised mounts
      Weight of broadside 7,990 lbs / 3,624 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.00" / 229 mm   410.00 ft / 124.97 m   14.00 ft / 4.27 m
   Ends:   Unarmoured
     Main Belt covers 107 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.00" / 25 mm   410.00 ft / 124.97 m   24.00 ft / 7.32 m
   Beam between torpedo bulkheads 60.00 ft / 18.29 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.00" / 229 mm   5.00" / 127 mm      9.00" / 229 mm
   2nd:   2.00" / 51 mm         -               -
   3rd:   1.00" / 25 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.00" / 51 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 65,912 shp / 49,170 Kw = 27.00 kts
   Range 7,400nm at 14.00 kts
   Bunker at max displacement = 3,066 tons

Complement:
   799 - 1,039

Cost:
   £1.768 million / $7.073 million

Distribution of weights at normal displacement:
   Armament: 1,418 tons, 7.6 %
      - Guns: 1,418 tons, 7.6 %
   Armour: 4,710 tons, 25.2 %
      - Belts: 2,163 tons, 11.6 %
      - Torpedo bulkhead: 364 tons, 1.9 %
      - Armament: 1,415 tons, 7.6 %
      - Armour Deck: 631 tons, 3.4 %
      - Conning Tower: 137 tons, 0.7 %
   Machinery: 2,583 tons, 13.8 %
   Hull, fittings & equipment: 7,013 tons, 37.5 %
   Fuel, ammunition & stores: 2,704 tons, 14.5 %
   Miscellaneous weights: 270 tons, 1.4 %
      - Hull below water: 50 tons
      - On freeboard deck: 70 tons
      - Above deck: 150 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     24,464 lbs / 11,097 Kg = 28.3 x 12.0 " / 305 mm shells or 3.6 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 4.6 ft / 1.4 m
   Roll period: 15.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.76
   Seaboat quality  (Average = 1.00): 1.26

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.520 / 0.528
   Length to Beam Ratio: 7.47 : 1
   'Natural speed' for length: 24.29 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   50.00 %,  27.00 ft / 8.23 m,  20.00 ft / 6.10 m
      - Forward deck:   20.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Aft deck:   15.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Quarter deck:   15.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Average freeboard:      21.40 ft / 6.52 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 105.8 %
      - Above water (accommodation/working, high = better): 150.8 %
   Waterplane Area: 31,631 Square feet or 2,939 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 157 lbs/sq ft or 768 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.80
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

150t for 1908  FC
50t for Long-range wireless and flagship facilities
70t for Enhanced Damage Control

[Desertfox]

Atago
Takao

Follow on to the Mayas, basically adds a fifth turret and some changes to the secondaries. Amagi style layout.



Atago class, Japan Battlecruiser laid down 1915

Displacement:
   17,958 t light; 19,153 t standard; 20,958 t normal; 22,402 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (644.76 ft / 640.00 ft) x 79.00 ft x (27.90 / 29.37 ft)
   (196.52 m / 195.07 m) x 24.08 m  x (8.50 / 8.95 m)

Armament:
      10 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 140 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     5 x Twin mounts on centreline, evenly spread
      2 raised mounts
      10 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 150 per gun
     Quick firing guns in casemate mounts, 1915 Model
     10 x Single mounts on sides, evenly spread
      8 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 150 per gun
     Quick firing guns in deck and hoist mounts, 1915 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      12 - 2.00" / 50.8 mm 45.0 cal guns - 4.03lbs / 1.83kg shells, 140 per gun
     Quick firing guns in deck mounts, 1915 Model
     4 x Triple mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 9,897 lbs / 4,489 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.00" / 229 mm   440.00 ft / 134.11 m   14.00 ft / 4.27 m
   Ends:   Unarmoured
     Main Belt covers 106 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.00" / 25 mm   440.00 ft / 134.11 m   24.00 ft / 7.32 m
   Beam between torpedo bulkheads 60.00 ft / 18.29 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.00" / 229 mm   5.00" / 127 mm      9.00" / 229 mm
   2nd:   2.00" / 51 mm         -               -
   3rd:   1.00" / 25 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.00" / 51 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 68,062 shp / 50,774 Kw = 27.00 kts
   Range 7,900nm at 14.00 kts
   Bunker at max displacement = 3,249 tons

Complement:
   870 - 1,132

Cost:
   £2.740 million / $10.959 million

Distribution of weights at normal displacement:
   Armament: 1,803 tons, 8.6 %
      - Guns: 1,803 tons, 8.6 %
   Armour: 5,443 tons, 26.0 %
      - Belts: 2,305 tons, 11.0 %
      - Torpedo bulkhead: 391 tons, 1.9 %
      - Armament: 1,716 tons, 8.2 %
      - Armour Deck: 884 tons, 4.2 %
      - Conning Tower: 147 tons, 0.7 %
   Machinery: 2,578 tons, 12.3 %
   Hull, fittings & equipment: 7,883 tons, 37.6 %
   Fuel, ammunition & stores: 3,000 tons, 14.3 %
   Miscellaneous weights: 250 tons, 1.2 %
      - Hull below water: 40 tons
      - On freeboard deck: 30 tons
      - Above deck: 180 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     26,398 lbs / 11,974 Kg = 30.6 x 12.0 " / 305 mm shells or 3.8 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 16.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.95
   Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.520 / 0.528
   Length to Beam Ratio: 8.10 : 1
   'Natural speed' for length: 25.30 kts
   Power going to wave formation at top speed: 49 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   35.00 %,  27.00 ft / 8.23 m,  20.00 ft / 6.10 m
      - Forward deck:   20.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Aft deck:   30.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Quarter deck:   15.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Average freeboard:      20.98 ft / 6.39 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 105.5 %
      - Above water (accommodation/working, high = better): 150.2 %
   Waterplane Area: 34,312 Square feet or 3,188 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 164 lbs/sq ft or 800 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.51
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

180t for 1908  FC
30t for Long-range wireless and flagship facilities
40t for Enhanced Damage Control

[Desertfox]

Kongo and Hiei

Kongo class, Japan Battlecruiser laid down 1917

Displacement:
   21,999 t light; 23,480 t standard; 25,646 t normal; 27,379 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (704.76 ft / 700.00 ft) x 90.00 ft x (27.40 / 28.82 ft)
   (214.81 m / 213.36 m) x 27.43 m  x (8.35 / 8.78 m)

Armament:
      8 - 14.00" / 356 mm 45.0 cal guns - 1,383.70lbs / 627.63kg shells, 135 per gun
     Breech loading guns in turret on barbette mounts, 1917 Model
     4 x Twin mounts on centreline, evenly spread
      2 raised mounts
      16 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 150 per gun
     Quick firing guns in casemate mounts, 1917 Model
     16 x Single mounts on sides, evenly spread
      8 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 170 per gun
     Quick firing guns in deck and hoist mounts, 1917 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
      12 - 2.00" / 50.8 mm 45.0 cal guns - 4.03lbs / 1.83kg shells, 250 per gun
     Quick firing guns in deck mounts, 1917 Model
     4 x Triple mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 12,631 lbs / 5,729 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.00" / 229 mm   440.00 ft / 134.11 m   14.00 ft / 4.27 m
   Ends:   Unarmoured
     Main Belt covers 97 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.40" / 36 mm   440.00 ft / 134.11 m   24.00 ft / 7.32 m
   Beam between torpedo bulkheads 74.00 ft / 22.56 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.00" / 229 mm   5.00" / 127 mm      9.00" / 229 mm
   2nd:   2.00" / 51 mm         -               -
   3rd:   1.00" / 25 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2.40" / 61 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 75,403 shp / 56,251 Kw = 27.00 kts
   Range 9,000nm at 14.00 kts
   Bunker at max displacement = 3,899 tons

Complement:
   1,013 - 1,317

Cost:
   £4.160 million / $16.640 million

Distribution of weights at normal displacement:
   Armament: 2,200 tons, 8.6 %
      - Guns: 2,200 tons, 8.6 %
   Armour: 6,270 tons, 24.4 %
      - Belts: 2,356 tons, 9.2 %
      - Torpedo bulkhead: 547 tons, 2.1 %
      - Armament: 1,789 tons, 7.0 %
      - Armour Deck: 1,408 tons, 5.5 %
      - Conning Tower: 169 tons, 0.7 %
   Machinery: 2,764 tons, 10.8 %
   Hull, fittings & equipment: 10,346 tons, 40.3 %
   Fuel, ammunition & stores: 3,648 tons, 14.2 %
   Miscellaneous weights: 420 tons, 1.6 %
      - Hull below water: 100 tons
      - On freeboard deck: 100 tons
      - Above deck: 220 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     33,994 lbs / 15,419 Kg = 24.8 x 14.0 " / 356 mm shells or 5.1 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 5.1 ft / 1.5 m
   Roll period: 16.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.92
   Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.520 / 0.528
   Length to Beam Ratio: 7.78 : 1
   'Natural speed' for length: 26.46 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   30.00 %,  27.00 ft / 8.23 m,  20.00 ft / 6.10 m
      - Forward deck:   20.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Aft deck:   35.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Quarter deck:   15.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
      - Average freeboard:      20.84 ft / 6.35 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.3 %
      - Above water (accommodation/working, high = better): 160.8 %
   Waterplane Area: 42,754 Square feet or 3,972 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 183 lbs/sq ft or 892 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.39
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

220t for 1912  FC
100t for Long-range wireless and flagship facilities
100t for Enhanced Damage Control

[Desertfox]

Stretched Kongo with an extra turret and the new 5" twins as secondaries.

Kirishima class, Japan Battlecruiser laid down 1920

Displacement:
   24,001 t light; 25,739 t standard; 27,816 t normal; 29,477 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (744.76 ft / 740.00 ft) x 92.00 ft x (27.50 / 28.76 ft)
   (227.00 m / 225.55 m) x 28.04 m  x (8.38 / 8.77 m)

Armament:
      10 - 14.00" / 356 mm 45.0 cal guns - 1,383.70lbs / 627.63kg shells, 140 per gun
     Breech loading guns in turret on barbette mounts, 1920 Model
     5 x Twin mounts on centreline, evenly spread
      2 raised mounts
      20 - 5.00" / 127 mm 54.0 cal guns - 67.24lbs / 30.50kg shells, 140 per gun
     Quick firing guns in deck and hoist mounts, 1920 Model
     10 x Twin mounts on sides, evenly spread
      8 - 1.00" / 25.4 mm 70.0 cal guns - 0.56lbs / 0.25kg shells, 300 per gun
     Machine guns in deck mounts, 1920 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 15,186 lbs / 6,888 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.00" / 229 mm   472.00 ft / 143.87 m   14.00 ft / 4.27 m
   Ends:   Unarmoured
     Main Belt covers 98 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.40" / 36 mm   472.00 ft / 143.87 m   24.00 ft / 7.32 m
   Beam between torpedo bulkheads 75.00 ft / 22.86 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.00" / 229 mm   5.00" / 127 mm      9.00" / 229 mm
   2nd:   1.00" / 25 mm   0.50" / 13 mm      1.00" / 25 mm
   3rd:   1.00" / 25 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2.40" / 61 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 77,784 shp / 58,027 Kw = 27.00 kts
   Range 9,000nm at 14.00 kts
   Bunker at max displacement = 3,737 tons

Complement:
   1,076 - 1,400

Cost:
   £6.300 million / $25.202 million

Distribution of weights at normal displacement:
   Armament: 2,700 tons, 9.7 %
      - Guns: 2,700 tons, 9.7 %
   Armour: 6,845 tons, 24.6 %
      - Belts: 2,510 tons, 9.0 %
      - Torpedo bulkhead: 587 tons, 2.1 %
      - Armament: 2,066 tons, 7.4 %
      - Armour Deck: 1,504 tons, 5.4 %
      - Conning Tower: 178 tons, 0.6 %
   Machinery: 2,720 tons, 9.8 %
   Hull, fittings & equipment: 11,367 tons, 40.9 %
   Fuel, ammunition & stores: 3,814 tons, 13.7 %
   Miscellaneous weights: 370 tons, 1.3 %
      - On freeboard deck: 100 tons
      - Above deck: 270 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     35,670 lbs / 16,180 Kg = 26.0 x 14.0 " / 356 mm shells or 5.1 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 5.9 ft / 1.8 m
   Roll period: 15.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.76
   Seaboat quality  (Average = 1.00): 1.28

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.520 / 0.527
   Length to Beam Ratio: 8.04 : 1
   'Natural speed' for length: 27.20 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 39
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   31.00 %,  27.00 ft / 8.23 m,  19.00 ft / 5.79 m
      - Forward deck:   20.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
      - Aft deck:   34.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
      - Quarter deck:   15.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
      - Average freeboard:      19.99 ft / 6.09 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.1 %
      - Above water (accommodation/working, high = better): 155.4 %
   Waterplane Area: 46,201 Square feet or 4,292 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 190 lbs/sq ft or 926 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.15
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

270t for  FC
100t for Long-range wireless and flagship facilities
100t for Enhanced Damage Control