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Monday, September 18, 2006

The 2001 version of the GB/CS/1914 plays the design as a very large destroyer

My 2001 version of the GB/CS/1914 seemed to me to be more plausible than my friend Cliff's original concept, which seemed pretty impractical. My version is essentially a very large destroyer with 4-6in guns. The speed is 32 knots and the cruising speed is 15 knots for a range of 4,500nm. The length on the waterline is 405ft. This is the Springsharp report:
GB/CS/1914 2001 version, Great Britain Scout Cruiser laid down 1914 (Engine 1931)

Displacement:
 3,173 t light; 3,281 t standard; 3,600 t normal; 3,855 t full load

Dimensions: Length overall / water x beam x draught
 406.31 ft / 405.00 ft x 41.00 ft x 14.00 ft (normal load)
 123.84 m / 123.44 m x 12.50 m  x 4.27 m

Armament:
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1914 Model
   Quick firing 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: 150

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 54,945 shp / 40,989 Kw = 32.00 kts
 Range 4,500nm at 15.00 kts
 Bunker at max displacement = 575 tons

Complement:
 232 - 302

Cost:
 £0.489 million / $1.957 million

Distribution of weights at normal displacement:
 Armament: 54 tons, 1.5 %
 Machinery: 1,628 tons, 45.2 %
 Hull, fittings & equipment: 1,490 tons, 41.4 %
 Fuel, ammunition & stores: 427 tons, 11.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   2,098 lbs / 951 Kg = 19.4 x 6.0 " / 152 mm shells or 0.5 torpedoes
 Stability (Unstable if below 1.00): 1.31
 Metacentric height 2.1 ft / 0.6 m
 Roll period: 11.8 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.34
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.542
 Length to Beam Ratio: 9.88 : 1
 'Natural speed' for length: 20.12 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: 0.00 ft / 0.00 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 (35 %):  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: 17.96 ft / 5.47 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 157.8 %
  - Above water (accommodation/working, high = better): 159.1 %
 Waterplane Area: 11,502 Square feet or 1,069 Square metres
 Displacement factor (Displacement / loading): 97 %
 Structure weight / hull surface area: 68 lbs/sq ft or 331 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.89
  - Longitudinal: 2.90
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

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