Battlecruisers

[Nobody]

Two ships, entered service February 1919
C13/BC-1 Arktur & C14/BC-2 Betelgeuze, Orange Battlecruiser laid down 1916

Displacement:
   28.601 t light; 30.092 t standard; 32.151 t normal; 33.798 t full load

Dimensions: Length overall / water x beam x draught
   693,33 ft / 690,62 ft x 93,00 ft x 33,00 ft (normal load)
   211,33 m / 210,50 m x 28,35 m  x 10,06 m

Armament:
     9 - 13,50" / 343 mm guns (3x3 guns), 1.230,19lbs / 558,00kg shells, 1916 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
     12 - 6,00" / 152 mm guns (6x2 guns), 105,82lbs / 48,00kg shells, 1916 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships, 3 raised mounts - superfiring
     8 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1916 Model
     Quick firing guns in deck mounts with hoists
     on side, evenly spread, 4 raised mounts
     16 - 1,00" / 25,4 mm guns (8x2 guns), 0,50lbs / 0,23kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, 4 raised mounts
     16 - 0,36" / 9,2 mm guns in single mounts, 0,02lbs / 0,01kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 12.458 lbs / 5.651 kg
   Shells per gun, main battery: 120
   4 - 21,0" / 533,4 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12,2" / 310 mm   472,44 ft / 144,00 m   15,09 ft / 4,60 m
   Ends:   4,53" / 115 mm   218,18 ft / 66,50 m   12,14 ft / 3,70 m
   Upper:   1,57" / 40 mm   472,44 ft / 144,00 m   11,15 ft / 3,40 m
     Main Belt covers 105% of normal length

  - Torpedo Bulkhead:
      2,00" / 51 mm   472,44 ft / 144,00 m   36,09 ft / 11,00 m

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15,0" / 381 mm   8,00" / 203 mm      14,0" / 356 mm
   2nd:   2,00" / 51 mm   1,00" / 25 mm      1,00" / 25 mm
   3rd:   1,00" / 25 mm   0,50" / 13 mm      0,50" / 13 mm
   4th:   0,59" / 15 mm         -               -
   5th:   0,39" / 10 mm         -               -

  - Armour deck: 3,00" / 76 mm, Conning tower: 14,00" / 356 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 115.807 shp / 86.392 Kw = 29,00 kts
   Range 10.000nm at 12,00 kts
   Bunker at max displacement = 3.707 tons

Complement:
   1.199 - 1.560

Cost:
   £4,772 million / $19,086 million

Distribution of weights at normal displacement:
   Armament: 1.561 tons, 4,9%
   Armour: 10.885 tons, 33,9%
      - Belts: 4.489 tons, 14,0%
      - Torpedo bulkhead: 1.262 tons, 3,9%
      - Armament: 2.385 tons, 7,4%
      - Armour Deck: 2.444 tons, 7,6%
      - Conning Tower: 305 tons, 0,9%
   Machinery: 4.315 tons, 13,4%
   Hull, fittings & equipment: 11.461 tons, 35,6%
   Fuel, ammunition & stores: 3.550 tons, 11,0%
   Miscellaneous weights: 380 tons, 1,2%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     36.143 lbs / 16.394 Kg = 29,4 x 13,5 " / 343 mm shells or 5,5 torpedoes
   Stability (Unstable if below 1.00): 1,11
   Metacentric height 5,5 ft / 1,7 m
   Roll period: 16,7 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0,54
   Seaboat quality  (Average = 1.00): 1,01

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0,531
   Length to Beam Ratio: 7,43 : 1
   'Natural speed' for length: 26,28 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 5,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      31,00 ft / 9,45 m
      - Forecastle (20%):   24,00 ft / 7,32 m
      - Mid (45%):      24,00 ft / 7,32 m (16,00 ft / 4,88 m aft of break)
      - Quarterdeck (20%):   16,00 ft / 4,88 m
      - Stern:      16,00 ft / 4,88 m
      - Average freeboard:   20,16 ft / 6,14 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 104,6%
      - Above water (accommodation/working, high = better): 129,4%
   Waterplane Area: 44.034 Square feet or 4.091 Square metres
   Displacement factor (Displacement / loading): 99%
   Structure weight / hull surface area: 177 lbs/sq ft or 866 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,96
      - Longitudinal: 1,38
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

250 t FC
50 t 2x"Radar"
25 t Radio
25 t Admiral staff quarters
24 t twelve Torpedos
6 t crew comfort