The J/DD/1916 design

The J/DD/1916 design has a higher speed, although only 33 knots, and a faster cruising speed, so that the range is now 3,500nm at 15 knots. The armament was increased with two more torpedo tubes, so that the armament is 4-4.7in QF guns, 1-3in AA, and 2-57mm AA guns, and 6-21in TT. This is the Springsharp report:

J/DD/1916, Japan Destroyer laid down 1916 (Engine 1921)

Displacement:
 1,207 t light; 1,234 t standard; 1,390 t normal; 1,515 t full load

Dimensions: Length overall / water x beam x draught
 310.21 ft / 308.00 ft x 31.00 ft x 12.00 ft (normal load)
 94.55 m / 93.88 m x 9.45 m  x 3.66 m

Armament:
      4 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1916 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, 1916 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, 1916 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
 6 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 37,386 shp / 27,890 Kw = 33.00 kts
 Range 3,500nm at 15.00 kts
 Bunker at max displacement = 280 tons

Complement:
 113 - 147

Cost:
 £0.288 million / $1.152 million

Distribution of weights at normal displacement:
 Armament: 30 tons, 2.2 %
 Machinery: 773 tons, 55.6 %
 Hull, fittings & equipment: 403 tons, 29.0 %
 Fuel, ammunition & stores: 183 tons, 13.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   310 lbs / 141 Kg = 6.0 x 4.7 " / 119 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.40
 Metacentric height 1.6 ft / 0.5 m
 Roll period: 10.4 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.46
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.425
 Length to Beam Ratio: 9.94 : 1
 'Natural speed' for length: 17.55 kts
 Power going to wave formation at top speed: 70 %
 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:  23.00 ft / 7.01 m
    - Forecastle (20 %): 20.00 ft / 6.10 m
    - Mid (37 %):  20.00 ft / 6.10 m (12.00 ft / 3.66 m aft of break)
    - Quarterdeck (15 %): 12.00 ft / 3.66 m
    - Stern:  12.00 ft / 3.66 m
    - Average freeboard: 15.20 ft / 4.63 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 194.5 %
  - Above water (accommodation/working, high = better): 80.4 %
 Waterplane Area: 5,972 Square feet or 555 Square metres
 Displacement factor (Displacement / loading): 49 %
 Structure weight / hull surface area: 30 lbs/sq ft or 147 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.43
  - Longitudinal: 2.83
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is cramped