The Ger/DD/1914 design

It is sort of marginal, but the Ger/DD/1914 design does work in Springsharp. It will work with heavier machinery than I am using, but I thought that such a small ship needed very lightweight machinery. I suspect that with a real ship, that less power would be required. I had originally estimated that 18,000 SHP would do the job, based on example ships. The desired displacement was 900 tons and the dimensions were 265ft x 27ft. The armament was 2-4in QF guns and 6-21in TT with 20 mines. The speed was 32 knots with a bunkerage of 200 tons. This is the Springsharp report:

Ger/DD/1914, Germany Destroyer laid down 1914 (Engine 1935)

Displacement:
 763 t light; 787 t standard; 900 t normal; 990 t full load

Dimensions: Length overall / water x beam x draught
 267.77 ft / 265.00 ft x 27.00 ft x 10.50 ft (normal load)
 81.62 m / 80.77 m x 8.23 m  x 3.20 m

Armament:
      2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1914 Model
   Quick firing guns in deck mounts with hoists
   on centreline ends, evenly spread
 Weight of broadside 64 lbs / 29 kg
 Shells per gun, main battery: 180
 6 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 27,168 shp / 20,267 Kw = 32.00 kts
 Range 3,750nm at 15.00 kts
 Bunker at max displacement = 203 tons

Complement:
 81 - 106

Cost:
 £0.127 million / $0.509 million

Distribution of weights at normal displacement:
 Armament: 8 tons, 0.9 %
 Machinery: 475 tons, 52.8 %
 Hull, fittings & equipment: 260 tons, 28.9 %
 Fuel, ammunition & stores: 137 tons, 15.2 %
 Miscellaneous weights: 20 tons, 2.2 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   227 lbs / 103 Kg = 7.1 x 4.0 " / 102 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.28
 Metacentric height 1.1 ft / 0.3 m
 Roll period: 10.9 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.21
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.419
 Length to Beam Ratio: 9.81 : 1
 'Natural speed' for length: 16.28 kts
 Power going to wave formation at top speed: 72 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 2.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  22.00 ft / 6.71 m
    - Forecastle (20 %): 20.00 ft / 6.10 m
    - Mid (23 %):  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: 14.00 ft / 4.27 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 179.7 %
  - Above water (accommodation/working, high = better): 54.7 %
 Waterplane Area: 4,458 Square feet or 414 Square metres
 Displacement factor (Displacement / loading): 55 %
 Structure weight / hull surface area: 25 lbs/sq ft or 120 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.42
  - Longitudinal: 3.53
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is cramped