My friend Cliff's GB/DL/1906 design

I thought that I would make another attempt to create Cliff's GB/DL/1906 design in Springsharp. This was a 35 knot ship with 4-88mm QF guns and 2-21in TT. As usual, it was anachronistic, but that is what he wanted. By playing games with Springsharp, I got a viable design, but with a much higher freeboard and displacement than Cliff had planned:

GB/DL/1906, Great Britain Destroyer Leader laid down 1906 (Engine 1933)

Displacement:
 1,590 t light; 1,633 t standard; 1,770 t normal; 1,880 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (328.52 ft / 326.00 ft) x 30.00 ft x (12.00 / 12.58 ft)
 (100.13 m / 99.36 m) x 9.14 m  x (3.66 / 3.83 m)

Armament:
      4 - 3.46" / 88.0 mm 50.0 cal guns - 22.00lbs / 9.98kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1906 Model
   4 x Single mounts on centreline, evenly spread
      Weight of broadside 88 lbs / 40 kg
      Main Torpedoes
      2 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.315 t each, 2.630 t total
 In 2 sets of deck mounted centre rotating tubes

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 57,363 shp / 42,793 Kw = 35.00 kts
 Range 3,500nm at 14.00 kts
 Bunker at max displacement = 247 tons

Complement:
 136 - 177

Cost:
 £0.218 million / $0.871 million

Distribution of weights at normal displacement:
 Armament: 33 tons, 1.9 %
    - Guns: 28 tons, 1.6 %
    - Weapons: 5 tons, 0.3 %
 Machinery: 1,089 tons, 61.5 %
 Hull, fittings & equipment: 471 tons, 26.6 %
 Fuel, ammunition & stores: 180 tons, 10.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   332 lbs / 151 Kg = 16.0 x 3.5 " / 88 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.13
 Metacentric height 1.0 ft / 0.3 m
 Roll period: 12.4 seconds
 Steadiness - As gun platform (Average = 50 %): 75 %
   - Recoil effect (Restricted arc if above 1.00): 0.30
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.528 / 0.535
 Length to Beam Ratio: 10.87 : 1
 'Natural speed' for length: 18.06 kts
 Power going to wave formation at top speed: 74 %
 Trim (Max stability = 0, Max steadiness = 100): 71
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 18.00 %,  24.00 ft / 7.32 m,  23.00 ft / 7.01 m
    - Forward deck: 14.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Aft deck: 53.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Quarter deck: 15.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Average freeboard:  17.63 ft / 5.37 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 203.4 %
  - Above water (accommodation/working, high = better): 125.2 %
 Waterplane Area: 6,686 Square feet or 621 Square metres
 Displacement factor (Displacement / loading): 52 %
 Structure weight / hull surface area: 28 lbs/sq ft or 137 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.42
  - Longitudinal: 3.98
  - Overall: 0.52
 Extremely poor machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Ship has slow, easy roll, a good, steady gun platform