Long Range Battle cruiser

[ledeper]

Poseidon, ESC Long Range Battle cruiser laid down 1917 (Engine 1916)

Displacement:
   27.238 t light; 28.446 t standard; 30.329 t normal; 31.836 t full load

Dimensions: Length overall / water x beam x draught
   720,58 ft / 716,54 ft x 104,99 ft x 27,89 ft (normal load)
   219,63 m / 218,40 m x 32,00 m  x 8,50 m

Armament:
      9 - 11,81" / 300 mm guns (3x3 guns), 823,82lbs / 373,68kg shells, 1917 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring
      20 - 5,91" / 150 mm guns (10x2 guns), 102,98lbs / 46,71kg shells, 1917 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships, 4 raised mounts - superfiring
      6 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1917 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 9.486 lbs / 4.303 kg
   Shells per gun, main battery: 110

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11,8" / 300 mm   537,40 ft / 163,80 m   12,30 ft / 3,75 m
   Ends:   Unarmoured
   Upper:   3,94" / 100 mm   537,40 ft / 163,80 m   8,01 ft / 2,44 m
     Main Belt covers 115 % of normal length

   - Torpedo Bulkhead:
      1,57" / 40 mm   537,40 ft / 163,80 m   27,85 ft / 8,49 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11,8" / 300 mm   3,94" / 100 mm      9,84" / 250 mm
   2nd:   0,98" / 25 mm   0,98" / 25 mm            -

   - Armour deck: 3,94" / 100 mm, Conning tower: 11,81" / 300 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric cruising motors plus geared drives, 4 shafts, 96.672 shp / 72.118 Kw = 28,00 kts
   Range 9.300nm at 12,00 kts
   Bunker at max displacement = 3.390 tons

Complement:
   1.148 - 1.493

Cost:
   £4,461 million / $17,844 million

Distribution of weights at normal displacement:
   Armament: 1.186 tons, 3,9 %
   Armour: 10.264 tons, 33,8 %
      - Belts: 3.979 tons, 13,1 %
      - Torpedo bulkhead: 872 tons, 2,9 %
      - Armament: 1.495 tons, 4,9 %
      - Armour Deck: 3.671 tons, 12,1 %
      - Conning Tower: 247 tons, 0,8 %
   Machinery: 3.602 tons, 11,9 %
   Hull, fittings & equipment: 11.537 tons, 38,0 %
   Fuel, ammunition & stores: 3.091 tons, 10,2 %
   Miscellaneous weights: 650 tons, 2,1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     46.014 lbs / 20.872 Kg = 55,9 x 11,8 " / 300 mm shells or 7,7 torpedoes
   Stability (Unstable if below 1.00): 1,25
   Metacentric height 8,1 ft / 2,5 m
   Roll period: 15,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 58 %
         - Recoil effect (Restricted arc if above 1.00): 0,30
   Seaboat quality  (Average = 1.00): 1,16

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,506
   Length to Beam Ratio: 6,83 : 1
   'Natural speed' for length: 26,77 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: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      22,97 ft / 7,00 m
      - Forecastle (10 %):   19,69 ft / 6,00 m
      - Mid (70 %):      19,69 ft / 6,00 m
      - Quarterdeck (15 %):   18,73 ft / 5,71 m
      - Stern:      18,73 ft / 5,71 m
      - Average freeboard:   19,60 ft / 5,97 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 87,8 %
      - Above water (accommodation/working, high = better): 163,8 %
   Waterplane Area: 50.397 Square feet or 4.682 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 172 lbs/sq ft or 838 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,98
      - Longitudinal: 1,20
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

[Korpen]

Poseidon, ESC Long Range Battle cruiser laid down 1917 (Engine 1916)
Armament:
      9 - 11,81" / 300 mm guns (3x3 guns), 823,82lbs / 373,68kg shells, 1917 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring

Undergunned for her size IMO, strip away some misc weight, reduce the deck armour a bit and make her 8000-10 000 ton smaller.
Yes, that also means dropping the torpedo bulkhead, but one can get three ships instead of two, so 50% more offensive power, or significantly more support shipping.