The GB/CA/1927 design

This generation of the design series is somewhat similar to the American Baltimore class. This design suffers from the overweight machinery used by Springsharp. In reality, the machinery should be lighter in weight for the power produced. I did not want to do that for this complete design series, however. The GB/CA/1927 generation mainly increases the speed to 35 knots, and has a secondary armament of 12-4.7in DP guns. The deck armour is also increased to 3.5in. This is the Springsharp report:

GB/CA/1927, Great Britain Heavy Cruiser laid down 1927

Displacement:
 15,789 t light; 16,405 t standard; 17,600 t normal; 18,556 t full load

Dimensions: Length overall / water x beam x draught
 674.10 ft / 672.00 ft x 64.00 ft x 25.00 ft (normal load)
 205.47 m / 204.83 m x 19.51 m  x 7.62 m

Armament:
      9 - 8.00" / 203 mm guns (3x3 guns), 256.00lbs / 116.12kg shells, 1927 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      12 - 4.70" / 119 mm guns (6x2 guns), 51.91lbs / 23.55kg shells, 1927 Model
   Dual purpose guns in deck mounts with hoists
   on side, all amidships
      32 - 1.57" / 40.0 mm guns (8x4 guns), 1.95lbs / 0.89kg shells, 1927 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread
      4 - 0.00" / 0.0 mm guns in single mounts, 0.00lbs / 0.00kg shells, 1927 Model
   Breech loading guns in deck mount 
   on side, evenly spread
 Weight of broadside 2,989 lbs / 1,356 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: 4.00" / 102 mm 600.00 ft / 182.88 m 14.00 ft / 4.27 m
 Ends: Unarmoured
   Main Belt covers 137 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 600.00 ft / 182.88 m 23.00 ft / 7.01 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm
 2nd: 2.00" / 51 mm 2.00" / 51 mm  2.00" / 51 mm

   - Armour deck: 3.50" / 89 mm, Conning tower: 4.00" / 102 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 146,241 shp / 109,096 Kw = 35.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 2,152 tons

Complement:
 763 - 993

Cost:
 £5.501 million / $22.004 million

Distribution of weights at normal displacement:
 Armament: 374 tons, 2.1 %
 Armour: 4,491 tons, 25.5 %
    - Belts: 1,335 tons, 7.6 %
    - Torpedo bulkhead: 511 tons, 2.9 %
    - Armament: 519 tons, 2.9 %
    - Armour Deck: 2,068 tons, 11.8 %
    - Conning Tower: 58 tons, 0.3 %
 Machinery: 4,616 tons, 26.2 %
 Hull, fittings & equipment: 6,308 tons, 35.8 %
 Fuel, ammunition & stores: 1,811 tons, 10.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   20,013 lbs / 9,078 Kg = 78.2 x 8.0 " / 203 mm shells or 2.3 torpedoes
 Stability (Unstable if below 1.00): 1.16
 Metacentric height 3.4 ft / 1.0 m
 Roll period: 14.6 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.60
 Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
 Hull has a flush deck
   and transom stern
 Block coefficient: 0.573
 Length to Beam Ratio: 10.50 : 1
 'Natural speed' for length: 29.25 kts
 Power going to wave formation at top speed: 60 %
 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:  30.00 ft / 9.14 m
    - Forecastle (20 %): 23.00 ft / 7.01 m
    - Mid (67 %):  23.00 ft / 7.01 m
    - Quarterdeck (15 %): 23.00 ft / 7.01 m
    - Stern:  23.00 ft / 7.01 m
    - Average freeboard: 23.56 ft / 7.18 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 148.2 %
  - Above water (accommodation/working, high = better): 136.4 %
 Waterplane Area: 31,944 Square feet or 2,968 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 118 lbs/sq ft or 574 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.50
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent