One of my 1980's designs: the GB/CL/1915 with 5in guns

This is a design that I created in the latter 1980's for a 5in-gunned light cruiser. This is sort of a modified Birmingham class ship, except faster, with geared turbines and oil-fired boilers. This ship does not have the machinery error that I have been getting. The armament is 8-5in guns and 4-21in TT. The belt is 4in with a 2in deck. This is the Springsharp report:

GB/CL/1915, Great Britain Light Cruiser laid down 1915

Displacement:
 4,494 t light; 4,643 t standard; 5,250 t normal; 5,736 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (476.68 ft / 475.00 ft) x 49.00 ft x (15.74 / 16.84 ft)
 (145.29 m / 144.78 m) x 14.94 m  x (4.80 / 5.13 m)

Armament:
      8 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Breech loading guns in deck and hoist mounts , 1915 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   4 x Twin mounts on sides, evenly spread
 Weight of broadside 520 lbs / 520 kg
 4 - 21.0" / 533 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 345.00 ft / 105.16 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 3.00" / 76 mm 175.00 ft / 53.34 m 8.00 ft / 2.44 m
   Main Belt covers 112 % of normal length

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

   - Armour deck: 2.00" / 51 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 31,471 shp / 23,478 Kw = 27.00 kts
 Range 5,200nm at 15.00 kts
 Bunker at max displacement = 1,094 tons

Complement:
 307 - 400

Cost:
 £0.553 million / $2.212 million

Distribution of weights at normal displacement:
 Armament: 127 tons, 2.4 %
 Armour: 1,296 tons, 24.7 %
    - Belts: 648 tons, 12.3 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 74 tons, 1.4 %
    - Armour Deck: 575 tons, 10.9 %
    - Conning Tower: 0 tons, 0.0 %
 Machinery: 1,192 tons, 22.7 %
 Hull, fittings & equipment: 1,939 tons, 36.9 %
 Fuel, ammunition & stores: 756 tons, 14.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   8,153 lbs / 3,698 Kg = 130.4 x 5.0 " / 127 mm shells or 1.5 torpedoes
 Stability (Unstable if below 1.00): 1.18
 Metacentric height 2.3 ft / 0.7 m
 Roll period: 13.4 seconds
 Steadiness - As gun platform (Average = 50 %): 74 %
   - Recoil effect (Restricted arc if above 1.00): 0.32
 Seaboat quality  (Average = 1.00): 1.48

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.502 / 0.512
 Length to Beam Ratio: 9.69 : 1
 'Natural speed' for length: 21.79 kts
 Power going to wave formation at top speed: 53 %
 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 (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  24.00 ft / 7.32 m,  22.00 ft / 6.71 m
    - Forward deck: 21.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 44.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Quarter deck: 15.00 %,  14.00 ft / 4.27 m,  15.00 ft / 4.57 m
    - Average freeboard:  17.52 ft / 5.34 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 84.1 %
  - Above water (accommodation/working, high = better): 140.9 %
 Waterplane Area: 15,530 Square feet or 1,443 Square metres
 Displacement factor (Displacement / loading): 125 %
 Structure weight / hull surface area: 75 lbs/sq ft or 367 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.56
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily