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Design SpecificationsEdit

Cascadia (1917 rebuild), Cascadian Dreadnought, laid down 1909, rebuilt 1917-1920
Units: 2

  • CRS Cascadia
  • CRS Pacifica


Displacement:
    26,422 t light; 28,113 t standard; 30,145 t normal; 31,771 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
    (602.00 ft / 592.00 ft) x 94.00 ft x (30.00 / 31.36 ft)
    (183.49 m / 180.44 m) x 28.65 m  x (9.14 / 9.56 m)

Armament:
      9 - 14.00" / 356 mm 52.0 cal guns - 1,620.00lbs / 734.82kg shells, 100 per gun
      Breech loading guns in turret on barbette mounts, 1916 Model
      3 x 3-gun mounts on centreline ends, majority forward
        1 raised mount - superfiring
      20 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 200 per gun
      Quick firing guns in casemate mounts, 1917 Model
      20 x Single mounts on sides, evenly spread
        18 hull mounts in casemates- Limited use in heavy seas
      12 - 3.00" / 76.2 mm 50.0 cal guns - 14.29lbs / 6.48kg shells, 250 per gun
      Anti-air guns in deck mounts, 1917 Model
      8 x Single mounts on side ends, evenly spread
        8 raised mounts
      4 x Single mounts on sides, evenly spread
        4 double raised mounts
      Weight of broadside 17,038 lbs / 7,728 kg
      Main Torpedoes
      4 - 21.0" / 533 mm, 16.40 ft / 5.00 m torpedoes - 1.078 t each, 4.313 t total
    submerged side tubes

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    13.5" / 343 mm    324.00 ft / 98.76 m    13.00 ft / 3.96 m
    Ends:    5.00" / 127 mm    262.00 ft / 79.86 m    13.00 ft / 3.96 m
      6.00 ft / 1.83 m Unarmoured ends
    Upper:    7.00" / 178 mm    354.00 ft / 107.90 m    10.50 ft / 3.20 m
      Main Belt covers 84 % of normal length
      Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
        3.00" / 76 mm    354.00 ft / 107.90 m    26.00 ft / 7.92 m
    Beam between torpedo bulkheads 72.00 ft / 21.95 m

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    13.0" / 330 mm    12.0" / 305 mm        12.0" / 305 mm
    2nd:    6.00" / 152 mm    6.00" / 152 mm        6.00" / 152 mm

   - Protected deck - single deck:
    For and Aft decks: 4.00" / 102 mm
    Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 13.00" / 330 mm, Aft 5.00" / 127 mm

Machinery:
    Oil fired boilers, steam turbines,
    Electric cruising motors plus geared drives, 4 shafts, 52,934 shp / 39,489 Kw = 23.32 kts
    Range 9,000nm at 13.00 kts
    Bunker at max displacement = 3,659 tons

Complement:
    1,143 - 1,487

Cost:
    £4.994 million / $19.978 million

Distribution of weights at normal displacement:
    Armament: 3,647 tons, 12.1 %
       - Guns: 3,638 tons, 12.1 %
       - Weapons: 9 tons, 0.0 %
    Armour: 11,560 tons, 38.3 %
       - Belts: 4,403 tons, 14.6 %
       - Torpedo bulkhead: 1,022 tons, 3.4 %
       - Armament: 2,876 tons, 9.5 %
       - Armour Deck: 2,883 tons, 9.6 %
       - Conning Towers: 376 tons, 1.2 %
    Machinery: 1,940 tons, 6.4 %
    Hull, fittings & equipment: 9,275 tons, 30.8 %
    Fuel, ammunition & stores: 3,723 tons, 12.4 %
    Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      39,990 lbs / 18,139 Kg = 29.1 x 14.0 " / 356 mm shells or 8.3 torpedoes
    Stability (Unstable if below 1.00): 1.15
    Metacentric height 5.9 ft / 1.8 m
    Roll period: 16.2 seconds
    Steadiness    - As gun platform (Average = 50 %): 55 %
            - Recoil effect (Restricted arc if above 1.00): 0.68
    Seaboat quality  (Average = 1.00): 1.09

Hull form characteristics:
    Hull has a flush deck,
      a normal bow and a round stern
    Block coefficient (normal/deep): 0.632 / 0.637
    Length to Beam Ratio: 6.30 : 1
    'Natural speed' for length: 24.33 kts
    Power going to wave formation at top speed: 50 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -10.00 degrees
    Stern overhang: 10.00 ft / 3.05 m
    Freeboard (% = length of deck as a percentage of waterline length):
                Fore end,     Aft end
       - Forecastle:    15.00 %,  20.50 ft / 6.25 m,  17.50 ft / 5.33 m
       - Forward deck:    35.00 %,  17.50 ft / 5.33 m,  17.50 ft / 5.33 m
       - Aft deck:    35.00 %,  17.50 ft / 5.33 m,  17.50 ft / 5.33 m
       - Quarter deck:    15.00 %,  17.50 ft / 5.33 m,  17.50 ft / 5.33 m
       - Average freeboard:        17.68 ft / 5.39 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 89.4 %
        - Above water (accommodation/working, high = better): 122.3 %
    Waterplane Area: 41,929 Square feet or 3,895 Square metres
    Displacement factor (Displacement / loading): 100 %
    Structure weight / hull surface area: 193 lbs/sq ft or 944 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0.96
        - Longitudinal: 1.48
        - Overall: 1.00
    Adequate machinery, storage, compartmentation space
    Excellent accommodation and workspace room



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