Cliff's GB/DL/1906 design

My friend Cliff wanted a big fast destroyer leader that he actually planned as using as large destroyers in groups, rather than as true leaders. Again, he liked the 88mm QF gun (20pdr) because of its rate of fire and easy handling. These were the second fastest ships we designed, having a maximum speed of 35 knots (52.3 SHP/ton).

GB/DL/1906, Great Britain Enter ship type laid down 1906 (Engine 1916)

Displacement:
 1,249 t light; 1,288 t standard; 1,368 t normal; 1,432 t full load

Dimensions: Length overall / water x beam x draught
 326.77 ft / 326.00 ft x 30.00 ft x 12.00 ft (normal load)
 99.60 m / 99.36 m x 9.14 m  x 3.66 m

Armament:
      4 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1906 Model
   Quick firing guns in deck mounts with hoists
   on centreline ends, evenly spread, all raised mounts - superfiring
 Weight of broadside 83 lbs / 38 kg
 Shells per gun, main battery: 250
 2 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 44,873 shp / 33,475 Kw = 35.00 kts
 Range 3,750nm at 10.00 kts
 Bunker at max displacement = 145 tons

Complement:
 112 - 146

Cost:
 £0.173 million / $0.690 million

Distribution of weights at normal displacement:
 Armament: 10 tons, 0.8 %
 Machinery: 858 tons, 62.7 %
 Hull, fittings & equipment: 380 tons, 27.8 %
 Fuel, ammunition & stores: 119 tons, 8.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   250 lbs / 114 Kg = 12.0 x 3.5 " / 88 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.49
 Metacentric height 1.6 ft / 0.5 m
 Roll period: 9.9 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.18
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.408
 Length to Beam Ratio: 10.87 : 1
 'Natural speed' for length: 18.06 kts
 Power going to wave formation at top speed: 70 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 2.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  22.00 ft / 6.71 m
    - Forecastle (31 %): 20.00 ft / 6.10 m
    - Mid (31 %):  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: 14.73 ft / 4.49 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 208.4 %
  - Above water (accommodation/working, high = better): 106.1 %
 Waterplane Area: 6,049 Square feet or 562 Square metres
 Displacement factor (Displacement / loading): 40 %
 Structure weight / hull surface area: 28 lbs/sq ft or 135 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.44
  - Longitudinal: 2.40
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is extremely poor
 Room for accommodation and workspaces is adequate