Baltic Battlecriuser desing studies

[ledeper]

Enter ship name, Enter country Enter ship type laid down 1912

Displacement:
   21.024 t light; 21.976 t standard; 26.100 t normal; 29.399 t full load

Dimensions: Length overall / water x beam x draught
   760,96 ft / 750,00 ft x 90,40 ft x 25,30 ft (normal load)
   231,94 m / 228,60 m x 27,55 m  x 7,71 m

Armament:
      6 - 12,00" / 305 mm guns (3x2 guns), 864,00lbs / 391,90kg shells, 1912 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring
      8 - 6,00" / 152 mm guns in single mounts, 108,00lbs / 48,99kg shells, 1912 Model
     Breech loading guns in deck mounts
     on side, all amidships
      8 - 3,46" / 88,0 mm guns in single mounts, 20,79lbs / 9,43kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      16 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 6.246 lbs / 2.833 kg
   Shells per gun, main battery: 120

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8,66" / 220 mm   487,50 ft / 148,59 m   11,41 ft / 3,48 m
   Ends:   Unarmoured
   Upper:   4,00" / 102 mm   487,50 ft / 148,59 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1,77" / 45 mm   487,50 ft / 148,59 m   23,42 ft / 7,14 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11,8" / 300 mm   5,12" / 130 mm      7,87" / 200 mm

   - Armour deck: 2,95" / 75 mm, Conning tower: 10,24" / 260 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 79.795 shp / 59.527 Kw = 27,45 kts
   Range 14.000nm at 14,00 kts
   Bunker at max displacement = 7.423 tons

Complement:
   1.026 - 1.334

Cost:
   £1,837 million / $7,348 million

Distribution of weights at normal displacement:
   Armament: 781 tons, 3,0 %
   Armour: 7.227 tons, 27,7 %
      - Belts: 2.706 tons, 10,4 %
      - Torpedo bulkhead: 748 tons, 2,9 %
      - Armament: 1.036 tons, 4,0 %
      - Armour Deck: 2.543 tons, 9,7 %
      - Conning Tower: 194 tons, 0,7 %
   Machinery: 3.182 tons, 12,2 %
   Hull, fittings & equipment: 9.484 tons, 36,3 %
   Fuel, ammunition & stores: 5.076 tons, 19,4 %
   Miscellaneous weights: 350 tons, 1,3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     45.675 lbs / 20.718 Kg = 52,9 x 12,0 " / 305 mm shells or 7,4 torpedoes
   Stability (Unstable if below 1.00): 1,31
   Metacentric height 6,9 ft / 2,1 m
   Roll period: 14,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,32
   Seaboat quality  (Average = 1.00): 1,43

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,533
   Length to Beam Ratio: 8,30 : 1
   'Natural speed' for length: 27,39 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 20,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30,12 ft / 9,18 m
      - Forecastle (20 %):   19,17 ft / 5,84 m
      - Mid (50 %):      19,17 ft / 5,84 m
      - Quarterdeck (15 %):   19,17 ft / 5,84 m
      - Stern:      19,17 ft / 5,84 m
      - Average freeboard:   20,05 ft / 6,11 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 82,9 %
      - Above water (accommodation/working, high = better): 165,7 %
   Waterplane Area: 46.551 Square feet or 4.325 Square metres
   Displacement factor (Displacement / loading): 129 %
   Structure weight / hull surface area: 147 lbs/sq ft or 715 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1,01
      - Longitudinal: 1,00
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[P3D]

Comes the first war, and Baltic trade would grind to halt due to the lack ship numbers. The BC Navy has enough heavy ships, but the combat value of the smaller ones is close to zero. Build the 28kts CA designs and a dozen 3-4000t light cruiser before laying down anything larger.

6x12" on 21000t is seriously undergunned and underarmored.