The Ger/DL/1914 design

I tried a different tact with my Ger/DL/1914 design, dating from the early 1970's. This is my original specification:

Ger/DL/1914

4-4in QF guns and 6-21in TT   32 knots  25,000 SHP
320ft x 33ft   30 mines  1250 tons
250 tons of oil fuel

I took that as my starting point for a Springsharp design. My design actually ended up having a smaller displacement:

Ger/DL/1914, Germany Destroyer Leader laid down 1914 (Engine 1950)

Displacement:
 1,029 t light; 1,072 t standard; 1,208 t normal; 1,318 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (327.84 ft / 320.00 ft) x 33.00 ft x (9.00 / 9.57 ft)
 (99.92 m / 97.54 m) x 10.06 m  x (2.74 / 2.92 m)

Armament:
      4 - 4.00" / 102 mm 50.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1914 Model
   4 x Single mounts on centreline, evenly spread
   Aft Main mounts separated by engine room
      Weight of broadside 128 lbs / 58 kg
      6 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.397 t each, 8.383 t total
 In 3 sets of deck mounted centre rotating tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 2.00" / 51 mm 1.00" / 25 mm  2.00" / 51 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 29,839 shp / 22,260 Kw = 32.00 kts
 Range 5,200nm at 14.00 kts
 Bunker at max displacement = 246 tons

Complement:
 102 - 133

Cost:
 £0.166 million / $0.664 million

Distribution of weights at normal displacement:
 Armament: 50 tons, 4.1 %
    - Guns: 42 tons, 3.4 %
    - Torpedoes: 8 tons, 0.7 %
 Armour: 28 tons, 2.3 %
    - Armament: 28 tons, 2.3 %
 Machinery: 570 tons, 47.2 %
 Hull, fittings & equipment: 350 tons, 29.0 %
 Fuel, ammunition & stores: 180 tons, 14.9 %
 Miscellaneous weights: 30 tons, 2.5 %
    - On freeboard deck: 30 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   423 lbs / 192 Kg = 13.2 x 4.0 " / 102 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.28
 Metacentric height 1.5 ft / 0.5 m
 Roll period: 11.4 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.23
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has raised forecastle,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.445 / 0.456
 Length to Beam Ratio: 9.70 : 1
 'Natural speed' for length: 17.89 kts
 Power going to wave formation at top speed: 68 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 6.00 ft / 1.83 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  21.00 ft / 6.40 m,  20.00 ft / 6.10 m
    - Forward deck: 30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Aft deck: 35.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Quarter deck: 15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Average freeboard:  15.28 ft / 4.66 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 163.5 %
  - Above water (accommodation/working, high = better): 117.5 %
 Waterplane Area: 6,709 Square feet or 623 Square metres
 Displacement factor (Displacement / loading): 74 %
 Structure weight / hull surface area: 28 lbs/sq ft or 137 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.44
  - Longitudinal: 2.09
  - Overall: 0.51
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is adequate