The GB/DL/1916 from the Red Book

I have this design for a super destroyer that I did back in the early 1970's. I suspect that it was mine, and not my friend Cliff's design. My concept for a super destroyer at the time included 6in QF guns, which is probably not such a great idea. Of course, the German Z-class from WWII used them (or at least 15cm QF guns). By using lightweight machinery, I was able to obtain an acceptable result. The pencil drawing only had dimensions and armament, so I had to see what speed could be achieved. By using light machinery, the ship can reach 36 knots, which seems sufficient. This is the Springsharp report:

GB/DL/1916, Great Britain Destroyer Leader laid down 1916 (Engine 1941)

Displacement:
 2,185 t light; 2,234 t standard; 2,450 t normal; 2,623 t full load

Dimensions: Length overall / water x beam x draught
 417.31 ft / 415.00 ft x 42.00 ft x 12.00 ft (normal load)
 127.20 m / 126.49 m x 12.80 m  x 3.66 m

Armament:
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1916 Model
   Breech loading guns in deck mounts with hoists
   on centreline, evenly spread
   Aft Main mounts separated by engine room
 Weight of broadside 432 lbs / 196 kg
 Shells per gun, main battery: 0
 4 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 64,750 shp / 48,304 Kw = 36.00 kts
 Range 4,250nm at 15.00 kts
 Bunker at max displacement = 389 tons

Complement:
 173 - 226

Cost:
 £0.510 million / $2.042 million

Distribution of weights at normal displacement:
 Armament: 54 tons, 2.2 %
 Machinery: 1,358 tons, 55.4 %
 Hull, fittings & equipment: 773 tons, 31.5 %
 Fuel, ammunition & stores: 265 tons, 10.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   635 lbs / 288 Kg = 5.9 x 6.0 " / 152 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.49
 Metacentric height 2.7 ft / 0.8 m
 Roll period: 10.7 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.30
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.410
 Length to Beam Ratio: 9.88 : 1
 'Natural speed' for length: 20.37 kts
 Power going to wave formation at top speed: 67 %
 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:  25.00 ft / 7.62 m
    - Forecastle (20 %): 23.00 ft / 7.01 m
    - Mid (32 %):  23.00 ft / 7.01 m (15.00 ft / 4.57 m aft of break)
    - Quarterdeck (15 %): 15.00 ft / 4.57 m
    - Stern:  15.00 ft / 4.57 m
    - Average freeboard: 17.72 ft / 5.40 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 194.0 %
  - Above water (accommodation/working, high = better): 164.9 %
 Waterplane Area: 10,794 Square feet or 1,003 Square metres
 Displacement factor (Displacement / loading): 64 %
 Structure weight / hull surface area: 38 lbs/sq ft or 188 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.46
  - Longitudinal: 1.70
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent