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Tuesday, November 25, 2008

A new version of the GB/CB/1916 fast battlecruiser photograph

I wanted to change some parts of this photograph. I just finished the job, although I keep making changes to it, if anyone has noticed. This is another attempt at a Springsharp design:
GB/CB/1916, Great Britain Battlecruiser laid down 1916 (Engine 1923)

Displacement:
 41,938 t light; 43,640 t standard; 46,358 t normal; 48,533 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (871.35 ft / 865.00 ft) x 106.00 ft x (32.00 / 33.19 ft)
 (265.59 m / 263.65 m) x 32.31 m  x (9.75 / 10.12 m)

Armament:
      6 - 16.50" / 419 mm 45.0 cal guns - 2,265.01lbs / 1,027.39kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   2 x Triple mounts on centreline, forward deck forward
      10 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   10 x Single mounts on sides, forward deck aft
  2 raised mounts - superfiring
      Weight of broadside 14,733 lbs / 6,683 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 9.00" / 229 mm 565.00 ft / 172.21 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 7.00" / 178 mm 565.00 ft / 172.21 m 8.00 ft / 2.44 m
   Main Belt covers 100 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 565.00 ft / 172.21 m 32.00 ft / 9.75 m
 Beam between torpedo bulkheads 68.00 ft / 20.73 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 7.00" / 178 mm  9.00" / 229 mm
 2nd: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 mm

   - Armoured deck - multiple decks:
 For and Aft decks: 3.00" / 76 mm
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 7.00" / 178 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 317,040 shp / 236,512 Kw = 36.00 kts
 Range 6,500nm at 16.00 kts
 Bunker at max displacement = 4,893 tons

Complement:
 1,579 - 2,053

Cost:
 £7.099 million / $28.394 million

Distribution of weights at normal displacement:
 Armament: 2,515 tons, 5.4 %
    - Guns: 2,515 tons, 5.4 %
 Armour: 10,695 tons, 23.1 %
    - Belts: 3,255 tons, 7.0 %
    - Torpedo bulkhead: 1,338 tons, 2.9 %
    - Armament: 2,073 tons, 4.5 %
    - Armour Deck: 3,584 tons, 7.7 %
    - Conning Towers: 445 tons, 1.0 %
 Machinery: 10,596 tons, 22.9 %
 Hull, fittings & equipment: 18,131 tons, 39.1 %
 Fuel, ammunition & stores: 4,420 tons, 9.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   55,474 lbs / 25,163 Kg = 24.7 x 16.5 " / 419 mm shells or 6.3 torpedoes
 Stability (Unstable if below 1.00): 1.24
 Metacentric height 8.0 ft / 2.5 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.54
 Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
 Hull has low quarterdeck ,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.553 / 0.558
 Length to Beam Ratio: 8.16 : 1
 'Natural speed' for length: 29.41 kts
 Power going to wave formation at top speed: 58 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 10.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  36.00 ft / 10.97 m,  31.00 ft / 9.45 m
    - Forward deck: 30.00 %,  31.00 ft / 9.45 m,  30.00 ft / 9.14 m
    - Aft deck: 17.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
    - Quarter deck: 33.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Average freeboard:  28.44 ft / 8.67 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 157.6 %
  - Above water (accommodation/working, high = better): 234.7 %
 Waterplane Area: 64,170 Square feet or 5,962 Square metres
 Displacement factor (Displacement / loading): 103 %
 Structure weight / hull surface area: 202 lbs/sq ft or 984 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.41
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room

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