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Colossus, Cascadian Dreadnought laid down 1914

Units: 4

  • CRS Colossus
  • CRS Goliath
  • CRS Titan
  • CRS Sentinel

Displacement:
    30,947 t light; 32,842 t standard; 35,372 t normal; 37,397 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
    (675.19 ft / 658.00 ft) x 97.00 ft x (29.75 / 31.20 ft)
    (205.80 m / 200.56 m) x 29.57 m  x (9.07 / 9.51 m)

Armament:
      12 - 14.00" / 356 mm 45.0 cal guns - 1,400.00lbs / 635.03kg shells, 100 per gun
      Breech loading guns in turret on barbette mounts, 1914 Model
      4 x 3-gun mounts on centreline ends, evenly spread
        2 raised mounts - superfiring
      20 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
      Quick firing guns in casemate mounts, 1914 Model
      20 x Single mounts on sides, evenly spread
        10 hull mounts in casemates- Limited use in heavy seas
      8 - 3.00" / 76.2 mm 50.0 cal guns - 14.29lbs / 6.48kg shells, 1,000 per gun
      Anti-air guns in deck and hoist mounts, 1914 Model
      8 x Single mounts on sides, evenly spread
      Weight of broadside 19,201 lbs / 8,709 kg
      Main Torpedoes
      2 - 21.0" / 533 mm, 23.00 ft / 7.01 m torpedoes - 1.456 t each, 2.913 t total
    submerged side tubes
      2nd Torpedoes
      4 - 21.0" / 533 mm, 23.00 ft / 7.01 m torpedoes - 1.456 t each, 5.825 t total
    below water reloads

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    14.0" / 356 mm    350.00 ft / 106.68 m    17.60 ft / 5.36 m
    Ends:    Unarmoured
    Upper:    8.00" / 203 mm    350.00 ft / 106.68 m    12.00 ft / 3.66 m
      Main Belt covers 82 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
        2.50" / 64 mm    396.00 ft / 120.70 m    28.00 ft / 8.53 m
    Beam between torpedo bulkheads 78.00 ft / 23.77 m

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    18.0" / 457 mm    6.50" / 165 mm        13.0" / 330 mm
    2nd:    3.00" / 76 mm    2.00" / 51 mm        3.00" / 76 mm
    3rd:    1.00" / 25 mm    1.00" / 25 mm              -

   - Armoured deck - single deck:
    For and Aft decks: 3.50" / 89 mm
    Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 16.00" / 406 mm, Aft 4.00" / 102 mm

Machinery:
    Oil fired boilers, steam turbines,
    Direct drive, 4 shafts, 55,051 shp / 41,068 Kw = 23.16 kts
    Range 9,000nm at 13.00 kts
    Bunker at max displacement = 4,555 tons

Complement:
    1,289 - 1,676

Cost:
    £3.896 million / $15.585 million

Distribution of weights at normal displacement:
    Armament: 3,935 tons, 11.1 %
       - Guns: 3,922 tons, 11.1 %
       - Weapons: 13 tons, 0.0 %
    Armour: 13,390 tons, 37.9 %
       - Belts: 5,456 tons, 15.4 %
       - Torpedo bulkhead: 1,026 tons, 2.9 %
       - Armament: 3,450 tons, 9.8 %
       - Armour Deck: 2,995 tons, 8.5 %
       - Conning Towers: 464 tons, 1.3 %
    Machinery: 2,121 tons, 6.0 %
    Hull, fittings & equipment: 11,501 tons, 32.5 %
    Fuel, ammunition & stores: 4,425 tons, 12.5 %
    Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      50,910 lbs / 23,092 Kg = 37.1 x 14.0 " / 356 mm shells or 7.8 torpedoes
    Stability (Unstable if below 1.00): 1.08
    Metacentric height 5.5 ft / 1.7 m
    Roll period: 17.3 seconds
    Steadiness    - As gun platform (Average = 50 %): 70 %
            - Recoil effect (Restricted arc if above 1.00): 0.95
    Seaboat quality  (Average = 1.00): 1.37

Hull form characteristics:
    Hull has rise forward of midbreak,
      a normal bow and a round stern
    Block coefficient (normal/deep): 0.652 / 0.657
    Length to Beam Ratio: 6.78 : 1
    'Natural speed' for length: 25.65 kts
    Power going to wave formation at top speed: 46 %
    Trim (Max stability = 0, Max steadiness = 100): 51
    Bow angle (Positive = bow angles forward): 5.00 degrees
    Stern overhang: 15.00 ft / 4.57 m
    Freeboard (% = length of deck as a percentage of waterline length):
                Fore end,     Aft end
       - Forecastle:    20.00 %,  25.00 ft / 7.62 m,  24.00 ft / 7.32 m
       - Forward deck:    30.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
       - Aft deck:    40.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
       - Quarter deck:    10.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
       - Average freeboard:        20.08 ft / 6.12 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 79.0 %
        - Above water (accommodation/working, high = better): 140.6 %
    Waterplane Area: 48,984 Square feet or 4,551 Square metres
    Displacement factor (Displacement / loading): 105 %
    Structure weight / hull surface area: 200 lbs/sq ft or 977 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0.96
        - Longitudinal: 1.41
        - Overall: 1.00
    Excellent 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

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