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Saturday, November 12, 2005

Battlecruiser version of the Super Queen Victoria class

I was thinking of the Kii and Owari, specifically, when I thought I would try a battlecruiser version of the Super Queen Victoria class. Of course, the Kii and Owari were fast battleships, but they would have been very similar to the Amagi class battlecruisers. Perhaps because my ships seem to be better protected, they are much larger. I also suspect that is because of the vagaries of Springsharp. If we had used lighter machinery, the result would be more in line with the prototype. This is the Springsharp report:
GB/CB/1915, Great Britain Battecruiser laid down 1915

Displacement:
 46,578 t light; 48,670 t standard; 51,200 t normal; 53,224 t full load

Dimensions: Length overall / water x beam x draught
 825.00 ft / 825.00 ft x 108.00 ft x 32.00 ft (normal load)
 251.46 m / 251.46 m x 32.92 m  x 9.75 m

Armament:
      8 - 16.00" / 406 mm guns (4x2 guns), 2,211.00lbs / 1,002.89kg shells, 1915 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      2 - 16.00" / 406 mm guns (1x2 guns), 2,211.00lbs / 1,002.89kg shells, 1915 Model
   Breech loading guns in a turret (on a barbette)
   on side amidships
      16 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1915 Model
   Quick firing guns in deck mounts with hoists
   on side, evenly spread, 6 raised mounts
      2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1915 Model
   Anti-aircraft guns in deck mounts with hoists
   on side, evenly spread, all raised mounts
 Weight of broadside 23,505 lbs / 10,662 kg
 Shells per gun, main battery: 80
 4 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 550.00 ft / 167.64 m 16.00 ft / 4.88 m
 Ends: 6.00" / 152 mm 270.00 ft / 82.30 m 16.00 ft / 4.88 m
   5.00 ft / 1.52 m Unarmoured ends
   Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 550.00 ft / 167.64 m 31.00 ft / 9.45 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 13.0" / 330 mm 8.00" / 203 mm  13.0" / 330 mm
 2nd: 13.0" / 330 mm 8.00" / 203 mm  13.0" / 330 mm
 3rd: 4.00" / 102 mm 1.00" / 25 mm  4.00" / 102 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 13.00" / 330 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 172,432 shp / 128,635 Kw = 30.00 kts
 Range 5,200nm at 15.00 kts
 Bunker at max displacement = 4,554 tons

Complement:
 1,701 - 2,212

Cost:
 £7.042 million / $28.169 million

Distribution of weights at normal displacement:
 Armament: 2,734 tons, 5.3 %
 Armour: 16,482 tons, 32.2 %
    - Belts: 5,477 tons, 10.7 %
    - Torpedo bulkhead: 1,262 tons, 2.5 %
    - Armament: 4,406 tons, 8.6 %
    - Armour Deck: 4,952 tons, 9.7 %
    - Conning Tower: 386 tons, 0.8 %
 Machinery: 6,532 tons, 12.8 %
 Hull, fittings & equipment: 20,830 tons, 40.7 %
 Fuel, ammunition & stores: 4,622 tons, 9.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   61,771 lbs / 28,019 Kg = 30.2 x 16.0 " / 406 mm shells or 8.2 torpedoes
 Stability (Unstable if below 1.00): 1.10
 Metacentric height 6.7 ft / 2.0 m
 Roll period: 17.5 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.81
 Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.629
 Length to Beam Ratio: 7.64 : 1
 'Natural speed' for length: 28.72 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  30.00 ft / 9.14 m
    - Forecastle (20 %): 27.00 ft / 8.23 m
    - Mid (67 %):  27.00 ft / 8.23 m (18.00 ft / 5.49 m aft of break)
    - Quarterdeck (15 %): 19.00 ft / 5.79 m
    - Stern:  19.00 ft / 5.79 m
    - Average freeboard: 24.51 ft / 7.47 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 101.8 %
  - Above water (accommodation/working, high = better): 184.7 %
 Waterplane Area: 66,918 Square feet or 6,217 Square metres
 Displacement factor (Displacement / loading): 100 %
 Structure weight / hull surface area: 224 lbs/sq ft or 1,094 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.15
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

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