The J/DD/1914 design

The J/DD/1914 design is very conservative for a large destroyer designed in 1914. The design worked immediately in Springsharp, although I tweaked the design so that I could add an AA armament. The design has a gun armament of 4-4.7in QF, 1-3in AA, and 4-57mm AA. The torpedo armament is 4-21in TT. The speed is a conservative 32 knots. This is the Springsharp report:

J/DD/1914, Japan Destroyer laid down 1914

Displacement:
 1,050 t light; 1,074 t standard; 1,180 t normal; 1,265 t full load

Dimensions: Length overall / water x beam x draught
 299.15 ft / 297.00 ft x 30.00 ft x 10.00 ft (normal load)
 91.18 m / 90.53 m x 9.14 m  x 3.05 m

Armament:
      4 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1914 Model
   Quick firing guns in deck mounts with hoists
   on centreline, evenly spread
   Aft Main mounts separated by engine room
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1914 Model
   Anti-aircraft gun in a deck mount with hoist
   on side amidships, 1 raised gun
      4 - 2.24" / 57.0 mm guns in single mounts, 5.65lbs / 2.56kg shells, 1914 Model
   Anti-aircraft guns in deck mounts 
   on side, all amidships, all raised mounts - superfiring
 Weight of broadside 244 lbs / 111 kg
 Shells per gun, main battery: 0
 4 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 30,954 shp / 23,091 Kw = 32.00 kts
 Range 3,500nm at 12.00 kts
 Bunker at max displacement = 191 tons

Complement:
 99 - 130

Cost:
 £0.195 million / $0.778 million

Distribution of weights at normal displacement:
 Armament: 30 tons, 2.6 %
 Machinery: 647 tons, 54.8 %
 Hull, fittings & equipment: 373 tons, 31.6 %
 Fuel, ammunition & stores: 130 tons, 11.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   288 lbs / 131 Kg = 5.5 x 4.7 " / 119 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.35
 Metacentric height 1.4 ft / 0.4 m
 Roll period: 10.7 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.59
 Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.464
 Length to Beam Ratio: 9.90 : 1
 'Natural speed' for length: 17.23 kts
 Power going to wave formation at top speed: 71 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: 1.00 ft / 0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  22.00 ft / 6.71 m
    - Forecastle (20 %): 19.00 ft / 5.79 m
    - Mid (50 %):  19.00 ft / 5.79 m (11.00 ft / 3.35 m aft of break)
    - Quarterdeck (15 %): 11.00 ft / 3.35 m
    - Stern:  11.00 ft / 3.35 m
    - Average freeboard: 15.24 ft / 4.65 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 194.6 %
  - Above water (accommodation/working, high = better): 112.2 %
 Waterplane Area: 5,748 Square feet or 534 Square metres
 Displacement factor (Displacement / loading): 45 %
 Structure weight / hull surface area: 29 lbs/sq ft or 142 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.43
  - Longitudinal: 3.06
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is adequate