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Sunday, April 22, 2007

The 11in-gunned version of the Ger/CB/1937 family of designs

The version of the Ger/CB/1937 is something like the Scharnhorst and Gneisenau, although also different. My design is smaller, for one thing. The photograph still gives a decent idea of what the ship looked like:

The ship has 9-11in/50 BLR, 12-6in QF, 12-4in AA guns and an 11in armour basis with a 4in deck. My original lacks a light AA armament, and I have not added one, although it would be warranted. The speed is a respectable 31 knots:
Ger/CB/1937 a1 11in guns, Germany Battlecruiser laid down 1937 (Engine 1941)

Displacement:
 25,300 t light; 26,333 t standard; 28,250 t normal; 29,783 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (695.64 ft / 689.00 ft) x 89.00 ft x (29.00 / 30.25 ft)
 (212.03 m / 210.01 m) x 27.13 m  x (8.84 / 9.22 m)

Armament:
      9 - 11.00" / 279 mm 50.0 cal guns - 710.00lbs / 322.05kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1937 Model
   3 x Triple mounts on centreline ends, majority forward
  1 raised mount - superfiring
      12 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1937 Model
   6 x Twin mounts on sides, forward deck aft
      12 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
   Anti-air guns in deck and hoist mounts , 1937 Model
   6 x Twin mounts on sides, forward deck aft
  6 raised mounts
 Weight of broadside 8,169 lbs / 8,169 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 11.0" / 279 mm 465.00 ft / 141.73 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 465.00 ft / 141.73 m 8.00 ft / 2.44 m
   Main Belt covers 104 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 465.00 ft / 141.73 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 11.0" / 279 mm 7.00" / 178 mm  11.0" / 279 mm
 2nd: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 mm
 3rd: 1.00" / 25 mm       -   1.00" / 25 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 11.00" / 279 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 140,922 shp / 105,128 Kw = 31.00 kts
 Range 7,500nm at 16.00 kts
 Bunker at max displacement = 3,450 tons

Complement:
 1,089 - 1,416

Cost:
 £12.288 million / $49.150 million

Distribution of weights at normal displacement:
 Armament: 1,729 tons, 6.1 %
 Armour: 9,774 tons, 34.6 %
    - Belts: 3,000 tons, 10.6 %
    - Torpedo bulkhead: 998 tons, 3.5 %
    - Armament: 2,371 tons, 8.4 %
    - Armour Deck: 3,185 tons, 11.3 %
    - Conning Tower: 220 tons, 0.8 %
 Machinery: 3,724 tons, 13.2 %
 Hull, fittings & equipment: 10,795 tons, 38.2 %
 Fuel, ammunition & stores: 2,949 tons, 10.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   43,353 lbs / 19,664 Kg = 65.1 x 11.0 " / 279 mm shells or 6.6 torpedoes
 Stability (Unstable if below 1.00): 1.08
 Metacentric height 4.9 ft / 1.5 m
 Roll period: 16.9 seconds
 Steadiness - As gun platform (Average = 50 %): 57 %
   - Recoil effect (Restricted arc if above 1.00): 0.62
 Seaboat quality  (Average = 1.00): 1.14

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.556 / 0.562
 Length to Beam Ratio: 7.74 : 1
 'Natural speed' for length: 26.25 kts
 Power going to wave formation at top speed: 56 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 8.00 degrees
 Stern overhang: 2.00 ft / 0.61 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: 35.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Quarter deck: 15.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Average freeboard:  25.53 ft / 7.78 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 90.6 %
  - Above water (accommodation/working, high = better): 185.9 %
 Waterplane Area: 43,037 Square feet or 3,998 Square metres
 Displacement factor (Displacement / loading): 112 %
 Structure weight / hull surface area: 165 lbs/sq ft or 807 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.63
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

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