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Thursday, November 10, 2005

A Super Lion "lite"

I was able to get a light version of the Super Lion to a point where the characteristics were acceptable. I wanted 6in armour, 30 knots, 10-15in, 14-6in, 2-4in AA guns, and a reasonable range. To achieve an acceptable design, the beam grew to 100ft. The issue was the recoil from the 10-15in gun broadside. Springsharp is concerned about such things, so therefore, I am. I was able to keep the displacement down to the range I wanted. This is the Springsharp report (if you see any issues, I would appreciate knowing):
Super Lion-lite, Great Britain Battlecruiser laid down 1912 (Engine 1927)

Displacement:
 31,825 t light; 33,471 t standard; 35,250 t normal; 36,674 t full load

Dimensions: Length overall / water x beam x draught
 735.00 ft / 735.00 ft x 100.00 ft x 30.00 ft (normal load)
 224.03 m / 224.03 m x 30.48 m  x 9.14 m

Armament:
      8 - 15.00" / 381 mm guns (4x2 guns), 1,920.00lbs / 870.90kg shells, 1912 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      2 - 15.00" / 381 mm guns (1x2 guns), 1,920.00lbs / 870.90kg shells, 1912 Model
   Breech loading guns in a turret (on a barbette)
   on centreline amidships
      14 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1912 Model
   Quick firing guns in casemate mounts 
   on side, evenly spread, 6 raised mounts
      2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1912 Model
   Anti-aircraft guns in deck mounts with hoists
   on side, all amidships, all raised mounts - superfiring
 Weight of broadside 20,664 lbs / 9,373 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 550.00 ft / 167.64 m 16.00 ft / 4.88 m
 Ends: 4.00" / 102 mm 185.00 ft / 56.39 m 12.00 ft / 3.66 m
   Main Belt covers 115 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 550.00 ft / 167.64 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 139,483 shp / 104,055 Kw = 30.00 kts
 Range 6,000nm at 15.00 kts
 Bunker at max displacement = 3,203 tons

Complement:
 1,286 - 1,672

Cost:
 £3.668 million / $14.671 million

Distribution of weights at normal displacement:
 Armament: 2,306 tons, 6.5 %
 Armour: 8,941 tons, 25.4 %
    - Belts: 2,536 tons, 7.2 %
    - Torpedo bulkhead: 1,180 tons, 3.3 %
    - Armament: 2,167 tons, 6.1 %
    - Armour Deck: 2,872 tons, 8.1 %
    - Conning Tower: 185 tons, 0.5 %
 Machinery: 4,403 tons, 12.5 %
 Hull, fittings & equipment: 16,175 tons, 45.9 %
 Fuel, ammunition & stores: 3,425 tons, 9.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   41,454 lbs / 18,803 Kg = 24.6 x 15.0 " / 381 mm shells or 5.8 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 6.2 ft / 1.9 m
 Roll period: 16.9 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.95
 Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.560
 Length to Beam Ratio: 7.35 : 1
 'Natural speed' for length: 27.11 kts
 Power going to wave formation at top speed: 54 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -1.00 ft / -0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  31.00 ft / 9.45 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (67 %):  26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
    - Quarterdeck (15 %): 18.00 ft / 5.49 m
    - Stern:  18.00 ft / 5.49 m
    - Average freeboard: 23.76 ft / 7.24 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 111.7 %
  - Above water (accommodation/working, high = better): 182.3 %
 Waterplane Area: 51,755 Square feet or 4,808 Square metres
 Displacement factor (Displacement / loading): 97 %
 Structure weight / hull surface area: 219 lbs/sq ft or 1,070 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.52
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

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