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Saturday, August 11, 2007

A small "Super Lion" (GB/CB/1912)

I have this small Super Lion specification from the early 1970's:
"Super Lion"  10-15in/42  12-4in QF
SHP=120,000   14 SHP/ton 

Displacement = 33,710 tons
Dimensions = 750ft x 100ft x 28.9ft

Armament      =  2,210 tons 
Machinery     =  8,570 tons
Miscellaneous =  3,000 tons
Hull          = 13,930 tons
Protection    =  6,000 tons

This is my actual Springsharp report:
GB/CB/1912 Super Lion, Great Britain Battlecruiser laid down 1912

Displacement:
 30,539 t light; 32,922 t standard; 36,228 t normal; 38,873 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (757.00 ft / 750.00 ft) x 100.00 ft x (28.90 / 30.61 ft)
 (230.73 m / 228.60 m) x 30.48 m  x (8.81 / 9.33 m)

Armament:
      10 - 15.00" / 381 mm 42.0 cal guns - 1,950.00lbs / 884.51kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1912 Model
   4 x Single mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   1 x Twin mount on centreline, aft deck forward
      12 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1912 Model
   6 x Twin mounts on sides, forward deck aft
      Weight of broadside 19,907 lbs / 9,029 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 530.00 ft / 161.54 m 9.00 ft / 2.74 m
 Ends: 4.00" / 102 mm 220.00 ft / 67.06 m 9.00 ft / 2.74 m
   Main Belt covers 109 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 530.00 ft / 161.54 m 28.90 ft / 8.81 m

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

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

   - Conning towers: Forward 8.00" / 203 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 142,243 shp / 106,113 Kw = 30.00 kts
 Range 6,700nm at 16.00 kts
 Bunker at max displacement = 5,951 tons

Complement:
 1,312 - 1,706

Cost:
 £3.330 million / $13.322 million

Distribution of weights at normal displacement:
 Armament: 3,085 tons, 8.5 %
 Armour: 7,792 tons, 21.5 %
    - Belts: 1,494 tons, 4.1 %
    - Torpedo bulkhead: 850 tons, 2.3 %
    - Armament: 2,237 tons, 6.2 %
    - Armour Deck: 3,023 tons, 8.3 %
    - Conning Tower: 189 tons, 0.5 %
 Machinery: 5,672 tons, 15.7 %
 Hull, fittings & equipment: 13,991 tons, 38.6 %
 Fuel, ammunition & stores: 5,689 tons, 15.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   45,165 lbs / 20,486 Kg = 26.8 x 15.0 " / 381 mm shells or 5.7 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 7.3 ft / 2.2 m
 Roll period: 15.5 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.83
 Seaboat quality  (Average = 1.00): 1.11

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.585 / 0.593
 Length to Beam Ratio: 7.50 : 1
 'Natural speed' for length: 27.39 kts
 Power going to wave formation at top speed: 53 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 36.00 %,  27.00 ft / 8.23 m,  26.00 ft / 7.92 m
    - Forward deck: 36.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Aft deck: 13.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  23.90 ft / 7.29 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 112.2 %
  - Above water (accommodation/working, high = better): 187.5 %
 Waterplane Area: 54,089 Square feet or 5,025 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 201 lbs/sq ft or 982 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.36
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

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