A new attempt at the GB/CS/1914 scout cruiser design

I took a fresh look at my friend Cliff's GB/CS/1914 scout cruiser design, and was able to obtain a good result from Springsharp. Of course, that requires lightweight machinery. I also had to increase freeboard and draft to achieve adequate seakeeping, as well as hull strength. The result is pretty satisfactory. This is an unarmored cruiser, of course. It is a fast version of the Amphion class, with superfiring guns and a flush deck. This is the Springsharp report:

GB/CS/1914, Great Britain Scout Cruiser laid down 1914 (Engine 1937)

Displacement:
 2,801 t light; 2,901 t standard; 3,200 t normal; 3,439 t full load

Dimensions: Length overall / water x beam x draught
 408.47 ft / 405.00 ft x 41.00 ft x 15.00 ft (normal load)
 124.50 m / 123.44 m x 12.50 m  x 4.57 m

Armament:
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1914 Model
   Quick firing guns in deck mounts with hoists
   on centreline ends, evenly spread, 2 raised mounts - superfiring
 Weight of broadside 432 lbs / 196 kg
 Shells per gun, main battery: 150
 4 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 48,338 shp / 36,060 Kw = 32.00 kts
 Range 4,850nm at 15.00 kts
 Bunker at max displacement = 538 tons

Complement:
 212 - 276

Cost:
 £0.421 million / $1.685 million

Distribution of weights at normal displacement:
 Armament: 54 tons, 1.7 %
 Machinery: 1,340 tons, 41.9 %
 Hull, fittings & equipment: 1,407 tons, 44.0 %
 Fuel, ammunition & stores: 399 tons, 12.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   2,080 lbs / 944 Kg = 19.3 x 6.0 " / 152 mm shells or 0.5 torpedoes
 Stability (Unstable if below 1.00): 1.30
 Metacentric height 2.1 ft / 0.6 m
 Roll period: 11.9 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.38
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.450
 Length to Beam Ratio: 9.88 : 1
 'Natural speed' for length: 20.12 kts
 Power going to wave formation at top speed: 64 %
 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:  21.00 ft / 6.40 m
    - Forecastle (20 %): 16.00 ft / 4.88 m
    - Mid (50 %):  16.00 ft / 4.88 m
    - Quarterdeck (15 %): 16.00 ft / 4.88 m
    - Stern:  16.00 ft / 4.88 m
    - Average freeboard: 16.40 ft / 5.00 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 148.4 %
  - Above water (accommodation/working, high = better): 127.0 %
 Waterplane Area: 10,589 Square feet or 984 Square metres
 Displacement factor (Displacement / loading): 103 %
 Structure weight / hull surface area: 71 lbs/sq ft or 347 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.90
  - Longitudinal: 2.57
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent