I went overboard, tonight with the GB/CB/1941

I designed a mammoth, very fast battlecruiser for the British navy, tonight, that works well. The draft is an acceptable 35ft. This is something of a departure from the series that I have been designing, in that the hull is flush-decked and the ship has three triple turrets. The ship has the largest caliber guns allowed by Springsharp: 21in (I think). The ship is really a fast battleship, but given the high speed, I wanted to call the design a battlecruiser. The normal displacement is 160,000 tons. I went ahead and specified the 15,000nm range at 18 knots, so the design is suitable for Pacific warfare. The cost is outrageous, but the capability is so great that I don't mind. One of these ships could run to ground almost any other ship on the seas. Smaller ships could possibly outrun the ship in calm seas for a short distance, but in any sort of a seaway at all, this design would be faster, over a greater distance. This is the Springsharp report:

GB/CB/1941, Great Britain Battlecruiser laid down 1941

Displacement:
 140,234 t light; 145,356 t standard; 160,000 t normal; 171,715 t full load

Dimensions: Length overall / water x beam x draught
 1,255.15 ft / 1,250.00 ft x 150.00 ft x 35.00 ft (normal load)
 382.57 m / 381.00 m x 45.72 m  x 10.67 m

Armament:
      9 - 21.00" / 533 mm guns (3x3 guns), 4,630.50lbs / 2,100.36kg shells, 1941 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      24 - 4.50" / 114 mm guns (10 mounts), 45.56lbs / 20.67kg shells, 1941 Model
   Dual purpose guns in turrets (on barbettes)
   on side, evenly spread, 10 raised mounts
      72 - 1.57" / 40.0 mm guns (18x4 guns), 1.95lbs / 0.89kg shells, 1941 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread, 8 raised mounts
 Weight of broadside 42,909 lbs / 19,463 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 17.0" / 432 mm 840.00 ft / 256.03 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 13.0" / 330 mm 840.00 ft / 256.03 m 8.00 ft / 2.44 m
   Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 840.00 ft / 256.03 m 34.00 ft / 10.36 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 17.0" / 432 mm 13.0" / 330 mm  17.0" / 432 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm
 3rd: 1.00" / 25 mm       -         -

   - Armour deck: 9.00" / 229 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 8 shafts, 542,974 shp / 405,058 Kw = 35.00 kts
 Range 15,000nm at 18.00 kts
 Bunker at max displacement = 26,360 tons

Complement:
 3,999 - 5,200

Cost:
 £70.612 million / $282.447 million

Distribution of weights at normal displacement:
 Armament: 5,364 tons, 3.4 %
 Armour: 56,734 tons, 35.5 %
    - Belts: 8,597 tons, 5.4 %
    - Torpedo bulkhead: 8,454 tons, 5.3 %
    - Armament: 9,080 tons, 5.7 %
    - Armour Deck: 29,841 tons, 18.7 %
    - Conning Tower: 762 tons, 0.5 %
 Machinery: 14,349 tons, 9.0 %
 Hull, fittings & equipment: 63,787 tons, 39.9 %
 Fuel, ammunition & stores: 19,766 tons, 12.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   346,389 lbs / 157,119 Kg = 74.8 x 21.0 " / 533 mm shells or 88.6 torpedoes
 Stability (Unstable if below 1.00): 1.26
 Metacentric height 14.0 ft / 4.3 m
 Roll period: 16.8 seconds
 Steadiness - As gun platform (Average = 50 %): 59 %
   - Recoil effect (Restricted arc if above 1.00): 0.48
 Seaboat quality  (Average = 1.00): 1.18

Hull form characteristics:
 Hull has a flush deck
   and transom stern
 Block coefficient: 0.853
 Length to Beam Ratio: 8.33 : 1
 'Natural speed' for length: 39.71 kts
 Power going to wave formation at top speed: 51 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 4.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  45.00 ft / 13.72 m
    - Forecastle (20 %): 35.00 ft / 10.67 m
    - Mid (67 %):  35.00 ft / 10.67 m
    - Quarterdeck (15 %): 35.00 ft / 10.67 m
    - Stern:  35.00 ft / 10.67 m
    - Average freeboard: 35.80 ft / 10.91 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 63.3 %
  - Above water (accommodation/working, high = better): 298.8 %
 Waterplane Area: 179,226 Square feet or 16,651 Square metres
 Displacement factor (Displacement / loading): 125 %
 Structure weight / hull surface area: 284 lbs/sq ft or 1,387 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.14
  - Longitudinal: 0.95
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent