The GB/CA/1937 design

The main goal for the GB/CA/1937 design was to increase the maximum speed to 36 knots. The only other increase was to the secondary armament, which is now 16-4.7in DP guns. The ship is large enough where 8in guns are almost too small. This is the Springsharp report:

GB/CA/1937, Great Britain Heavy Cruiser laid down 1937

Displacement:
 18,661 t light; 19,434 t standard; 21,000 t normal; 22,253 t full load

Dimensions: Length overall / water x beam x draught
 714.00 ft / 714.00 ft x 70.00 ft x 26.50 ft (normal load)
 217.63 m / 217.63 m x 21.34 m  x 8.08 m

Armament:
      12 - 8.00" / 203 mm guns (4x3 guns), 256.00lbs / 116.12kg shells, 1937 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      16 - 4.70" / 119 mm guns (8x2 guns), 51.91lbs / 23.55kg shells, 1937 Model
   Dual purpose guns in turrets (on barbettes)
   on side, all amidships
      48 - 1.57" / 40.0 mm guns (12x4 guns), 1.95lbs / 0.89kg shells, 1937 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread
 Weight of broadside 3,996 lbs / 1,813 kg
 Shells per gun, main battery: 150
 16 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 5.00" / 127 mm 660.00 ft / 201.17 m 5.00 ft / 1.52 m
 Ends: Unarmoured
   Main Belt covers 142 % of normal length

   - Torpedo Bulkhead:
  1.00" / 25 mm 660.00 ft / 201.17 m 25.00 ft / 7.62 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 3.00" / 76 mm  6.00" / 152 mm
 2nd: 2.00" / 51 mm 2.00" / 51 mm  2.00" / 51 mm
 3rd: 1.00" / 25 mm       -         -

   - Armour deck: 4.00" / 102 mm, Conning tower: 6.00" / 152 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 176,963 shp / 132,014 Kw = 36.00 kts
 Range 8,500nm at 15.00 kts
 Bunker at max displacement = 2,820 tons

Complement:
 871 - 1,133

Cost:
 £9.597 million / $38.387 million

Distribution of weights at normal displacement:
 Armament: 500 tons, 2.4 %
 Armour: 5,221 tons, 24.9 %
    - Belts: 652 tons, 3.1 %
    - Torpedo bulkhead: 611 tons, 2.9 %
    - Armament: 1,161 tons, 5.5 %
    - Armour Deck: 2,700 tons, 12.9 %
    - Conning Tower: 98 tons, 0.5 %
 Machinery: 4,905 tons, 23.4 %
 Hull, fittings & equipment: 8,035 tons, 38.3 %
 Fuel, ammunition & stores: 2,339 tons, 11.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   25,896 lbs / 11,746 Kg = 101.2 x 8.0 " / 203 mm shells or 3.0 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 3.4 ft / 1.0 m
 Roll period: 15.9 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.69
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has a flush deck
   and transom stern
 Block coefficient: 0.555
 Length to Beam Ratio: 10.20 : 1
 'Natural speed' for length: 30.27 kts
 Power going to wave formation at top speed: 59 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  32.00 ft / 9.75 m
    - Forecastle (20 %): 25.00 ft / 7.62 m
    - Mid (50 %):  25.00 ft / 7.62 m
    - Quarterdeck (15 %): 25.00 ft / 7.62 m
    - Stern:  25.00 ft / 7.62 m
    - Average freeboard: 25.56 ft / 7.79 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 132.5 %
  - Above water (accommodation/working, high = better): 155.5 %
 Waterplane Area: 36,486 Square feet or 3,390 Square metres
 Displacement factor (Displacement / loading): 110 %
 Structure weight / hull surface area: 132 lbs/sq ft or 644 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.51
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent