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Saturday, April 28, 2007

The 16in-gunned version of the Ger/CB/1935

The next step up in the family of Ger/CB/1935 designs has 16in guns. The speed is now 29 knots and the armour basis is 14in. The resulting ship works extremely well. The displacement is not excessive, either. This is the Springsharp report:
Ger/CB/1935  16in guns, Germany Battlecruiser laid down 1935

Displacement:
 44,553 t light; 47,337 t standard; 50,235 t normal; 52,554 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (823.41 ft / 814.00 ft) x 120.00 ft x (30.00 / 31.14 ft)
 (250.98 m / 248.11 m) x 36.58 m  x (9.14 / 9.49 m)

Armament:
      9 - 16.00" / 406 mm 50.0 cal guns - 2,170.00lbs / 984.30kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1935 Model
   3 x Triple mounts on centreline ends, majority forward
  1 raised mount - superfiring
      12 - 6.00" / 152 mm 55.0 cal guns - 115.00lbs / 52.16kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1935 Model
   12 x Single mounts on sides, evenly spread
      12 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Anti-air guns in deck mount , 1935 Model
   1 x Single mount on sides amidships
      32 - 1.46" / 37.0 mm 60.0 cal guns - 1.69lbs / 0.77kg shells, 150 per gun
   Anti-air guns in deck mounts , 1935 Model
   8 x Single mounts on sides, evenly spread
  7 raised mounts
 Weight of broadside 21,351 lbs / 21,351 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 530.00 ft / 161.54 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 11.0" / 279 mm 530.00 ft / 161.54 m 8.00 ft / 2.44 m
   Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 530.00 ft / 161.54 m 30.00 ft / 9.14 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 10.0" / 254 mm  14.0" / 356 mm
 2nd: 4.00" / 102 mm 1.00" / 25 mm  4.00" / 102 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 14.00" / 356 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 151,631 shp / 113,117 Kw = 29.00 kts
 Range 8,500nm at 15.00 kts
 Bunker at max displacement = 5,218 tons

Complement:
 1,677 - 2,181

Cost:
 £22.238 million / $88.953 million

Distribution of weights at normal displacement:
 Armament: 4,060 tons, 8.1 %
 Armour: 16,464 tons, 32.8 %
    - Belts: 4,607 tons, 9.2 %
    - Torpedo bulkhead: 2,353 tons, 4.7 %
    - Armament: 3,806 tons, 7.6 %
    - Armour Deck: 5,287 tons, 10.5 %
    - Conning Tower: 411 tons, 0.8 %
 Machinery: 4,308 tons, 8.6 %
 Hull, fittings & equipment: 21,155 tons, 42.1 %
 Fuel, ammunition & stores: 5,683 tons, 11.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   81,825 lbs / 37,115 Kg = 40.0 x 16.0 " / 406 mm shells or 14.7 torpedoes
 Stability (Unstable if below 1.00): 1.24
 Metacentric height 9.7 ft / 3.0 m
 Roll period: 16.2 seconds
 Steadiness - As gun platform (Average = 50 %): 61 %
   - Recoil effect (Restricted arc if above 1.00): 0.51
 Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.600 / 0.605
 Length to Beam Ratio: 6.78 : 1
 'Natural speed' for length: 28.53 kts
 Power going to wave formation at top speed: 51 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 11.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  33.00 ft / 10.06 m,  27.00 ft / 8.23 m
    - Forward deck: 30.00 %,  27.00 ft / 8.23 m,  24.00 ft / 7.32 m
    - Aft deck: 30.00 %,  24.00 ft / 7.32 m,  25.00 ft / 7.62 m
    - Quarter deck: 20.00 %,  25.00 ft / 7.62 m,  26.00 ft / 7.92 m
    - Average freeboard:  25.98 ft / 7.92 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 82.6 %
  - Above water (accommodation/working, high = better): 202.9 %
 Waterplane Area: 71,441 Square feet or 6,637 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 222 lbs/sq ft or 1,082 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.35
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily

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