A Super Swift design

I thought that I would like to try a Super Swift design, with the original concept, without armour. Winston Churchill described the ship as "The Super Swift. 37 knots. six 4-inch--600 tons of oil. £250,000." (page 144 of The World Crisis). He does not supply a displacement or dimensions, sadly so we are forced to guess. Springsharp creates some problems, in that too much power is required to reach 37 knots, more than is realistic. That causes the machinery to weigh too much, and affects seakeeping and strength. I had to lengthen the ship more than I think appropriate and give the ship too much freeboard and draft. This is an attempt at a photo:

Still, I was able to make the design work, although not very well:

GB/DD/1912 Super Swift, Great Britain Scout laid down 1912 (Engine 1950)

Displacement:
 1,997 t light; 2,061 t standard; 2,250 t normal; 2,401 t full load

Dimensions: Length overall / water x beam x draught
 376.26 ft / 375.00 ft x 37.00 ft x 14.00 ft (normal load)
 114.68 m / 114.30 m x 11.28 m  x 4.27 m

Armament:
      6 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1912 Model
   Quick firing guns in deck mounts with hoists
   on side, evenly spread
 Weight of broadside 192 lbs / 87 kg
 Shells per gun, main battery: 180
 4 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 72,789 shp / 54,301 Kw = 37.00 kts
 Range 4,200nm at 15.00 kts
 Bunker at max displacement = 341 tons

Complement:
 163 - 212

Cost:
 £0.276 million / $1.105 million

Distribution of weights at normal displacement:
 Armament: 24 tons, 1.1 %
 Machinery: 1,330 tons, 59.1 %
 Hull, fittings & equipment: 643 tons, 28.6 %
 Fuel, ammunition & stores: 253 tons, 11.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   505 lbs / 229 Kg = 15.8 x 4.0 " / 102 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.51
 Metacentric height 2.3 ft / 0.7 m
 Roll period: 10.3 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.20
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.405
 Length to Beam Ratio: 10.14 : 1
 'Natural speed' for length: 19.36 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: 0.00 ft / 0.00 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  24.00 ft / 7.32 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: 17.64 ft / 5.38 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 198.9 %
  - Above water (accommodation/working, high = better): 132.2 %
 Waterplane Area: 8,568 Square feet or 796 Square metres
 Displacement factor (Displacement / loading): 61 %
 Structure weight / hull surface area: 34 lbs/sq ft or 167 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.43
  - Longitudinal: 2.55
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent