An incremental advance to the GB/CL/1923

The increase in performance to the GB/CL/1923 is not huge, but the result is still a better design than its predecessor from 1921. This ship has a similar armament: 8-6in QF, 6-4.7in AA, 24-2pdr AA, and 16-21in TT. The speed is now 33.75 knots for a range of 7,800nm at 15 knots. The main armament is light, but the armour basis is 4in with a 2in deck. This is the Springsharp report:

GB/CL/1923, Great Britain Light Cruiser laid down 1923

Displacement:
 10,627 t light; 10,981 t standard; 12,200 t normal; 13,175 t full load

Dimensions: Length overall / water x beam x draught
 596.42 ft / 595.00 ft x 58.00 ft x 23.00 ft (normal load)
 181.79 m / 181.36 m x 17.68 m  x 7.01 m

Armament:
      8 - 6.00" / 152 mm guns (4x2 guns), 108.00lbs / 48.99kg shells, 1923 Model
   Quick firing guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      6 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1923 Model
   Anti-aircraft guns in deck mounts with hoists
   on side, all amidships
      24 - 1.57" / 40.0 mm guns (6x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
   Breech loading guns in deck mounts 
   on side ends, evenly spread
 Weight of broadside 1,223 lbs / 555 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 520.00 ft / 158.50 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 134 % of normal length

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

   - Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 120,061 shp / 89,566 Kw = 33.75 kts
 Range 7,800nm at 15.00 kts
 Bunker at max displacement = 2,194 tons

Complement:
 579 - 754

Cost:
 £3.090 million / $12.359 million

Distribution of weights at normal displacement:
 Armament: 153 tons, 1.3 %
 Armour: 2,232 tons, 18.3 %
    - Belts: 994 tons, 8.1 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 311 tons, 2.5 %
    - Armour Deck: 881 tons, 7.2 %
    - Conning Tower: 46 tons, 0.4 %
 Machinery: 4,013 tons, 32.9 %
 Hull, fittings & equipment: 4,230 tons, 34.7 %
 Fuel, ammunition & stores: 1,573 tons, 12.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   10,937 lbs / 4,961 Kg = 101.3 x 6.0 " / 152 mm shells or 1.3 torpedoes
 Stability (Unstable if below 1.00): 1.22
 Metacentric height 3.2 ft / 1.0 m
 Roll period: 13.7 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.36
 Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.538
 Length to Beam Ratio: 10.26 : 1
 'Natural speed' for length: 24.39 kts
 Power going to wave formation at top speed: 60 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  27.00 ft / 8.23 m
    - Forecastle (20 %): 24.00 ft / 7.32 m
    - Mid (67 %):  24.00 ft / 7.32 m (16.00 ft / 4.88 m aft of break)
    - Quarterdeck (15 %): 16.00 ft / 4.88 m
    - Stern:  16.00 ft / 4.88 m
    - Average freeboard: 21.60 ft / 6.58 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 116.6 %
  - Above water (accommodation/working, high = better): 116.1 %
 Waterplane Area: 23,814 Square feet or 2,212 Square metres
 Displacement factor (Displacement / loading): 106 %
 Structure weight / hull surface area: 100 lbs/sq ft or 490 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.66
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is adequate