The GB/CL/1921 light cruiser in this design series

The next installment of my British light cruiser design series is the GB/CL/1921. This is as large as it is for several reasons. One is that the speed is somewhat high at 33 knots. The range is also substantial at 7,200nm at 15 knots. The armour basis is 4in with a 2in deck, and that is a contributing factor. The armament is little different: 8-6in QF, 4-4in AA, 16-2pdr AA, and 12-21in TT. One thing I found is that if you leave the submerged tubes blank, rather than zero, bad things happen. I wouldn't be surprised if something like that appears in some of the other designs. This is the Springsharp report:

GB/CL/1921, Great Britain Light Cruiser laid down 1921

Displacement:
 10,066 t light; 10,386 t standard; 11,500 t normal; 12,391 t full load

Dimensions: Length overall / water x beam x draught
 576.42 ft / 575.00 ft x 58.00 ft x 21.00 ft (normal load)
 175.69 m / 175.26 m x 17.68 m  x 6.40 m

Armament:
      8 - 6.00" / 152 mm guns (4x2 guns), 108.00lbs / 48.99kg shells, 1921 Model
   Quick firing guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1921 Model
   Anti-aircraft guns in deck mounts with hoists
   on side, all amidships
      16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.89kg shells, 1921 Model
   Breech loading guns in deck mounts 
   on side ends, evenly spread
 Weight of broadside 1,023 lbs / 464 kg
 Shells per gun, main battery: 150
 12 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 485.00 ft / 147.83 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 130 % 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, 109,722 shp / 81,853 Kw = 33.00 kts
 Range 7,200nm at 15.00 kts
 Bunker at max displacement = 2,006 tons

Complement:
 554 - 721

Cost:
 £2.517 million / $10.067 million

Distribution of weights at normal displacement:
 Armament: 128 tons, 1.1 %
 Armour: 2,172 tons, 18.9 %
    - Belts: 936 tons, 8.1 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 311 tons, 2.7 %
    - Armour Deck: 881 tons, 7.7 %
    - Conning Tower: 44 tons, 0.4 %
 Machinery: 3,778 tons, 32.9 %
 Hull, fittings & equipment: 3,988 tons, 34.7 %
 Fuel, ammunition & stores: 1,434 tons, 12.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   10,982 lbs / 4,982 Kg = 101.7 x 6.0 " / 152 mm shells or 1.3 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 3.2 ft / 1.0 m
 Roll period: 13.5 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.30
 Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.575
 Length to Beam Ratio: 9.91 : 1
 'Natural speed' for length: 23.98 kts
 Power going to wave formation at top speed: 61 %
 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): 115.4 %
  - Above water (accommodation/working, high = better): 134.2 %
 Waterplane Area: 23,821 Square feet or 2,213 Square metres
 Displacement factor (Displacement / loading): 107 %
 Structure weight / hull surface area: 98 lbs/sq ft or 478 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.63
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent