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Thursday, May 26, 2005

This is a small "Super Lion" design

My smallest Super Lion design in the early 1970's was for a 750ft-long ship with a 100ft beam. I did another version which was practically Vanguard size. My actual Springsharp design has a greater displacement and I added 4in QF guns to have 16, as that is a more reasonable anti-torpedo boat armament than only 12-4in QF. I went with a uniform 7in belt between the end barbettes. The ends are 4in, as I could not justify going with "All or nothing" for the Super Lion. The design has a "Tiger" look, with three equally spaced funnels and a tripod foremast. This is the Springsharp report:
Super Lion (Alternative), Great Britain Battlecruiser laid down 1912

Displacement:
 33,775 t light; 35,317 t standard; 38,186 t normal; 40,481 t full load

Dimensions: Length overall / water x beam x draught
 750.00 ft / 750.00 ft x 100.00 ft x 31.00 ft (normal load)
 228.60 m / 228.60 m x 30.48 m  x 9.45 m

Armament:
      10 - 15.00" / 381 mm guns (5x2 guns), 1,687.50lbs / 765.44kg shells, 1912 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, all raised mounts - superfiring
      16 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1912 Model
   Quick firing guns in casemate mounts 
   on side, all amidships, all raised mounts - superfiring
 Weight of broadside 17,387 lbs / 7,887 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 7.00" / 178 mm 530.00 ft / 161.54 m 17.00 ft / 5.18 m
 Ends: 4.00" / 102 mm 220.00 ft / 67.06 m 17.00 ft / 5.18 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 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 6.00" / 152 mm  8.00" / 203 mm
 2nd: 2.00" / 51 mm       -         -

   - Armour deck: 2.50" / 64 mm, Conning tower: 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 145,842 shp / 108,798 Kw = 30.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 5,164 tons

Complement:
 1,365 - 1,775

Cost:
 £3.822 million / $15.287 million

Distribution of weights at normal displacement:
 Armament: 2,173 tons, 5.7 %
 Armour: 9,445 tons, 24.7 %
    - Belts: 3,218 tons, 8.4 %
    - Torpedo bulkhead: 794 tons, 2.1 %
    - Armament: 2,735 tons, 7.2 %
    - Armour Deck: 2,478 tons, 6.5 %
    - Conning Tower: 220 tons, 0.6 %
 Machinery: 5,815 tons, 15.2 %
 Hull, fittings & equipment: 16,341 tons, 42.8 %
 Fuel, ammunition & stores: 4,411 tons, 11.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   42,167 lbs / 19,127 Kg = 25.0 x 15.0 " / 381 mm shells or 5.3 torpedoes
 Stability (Unstable if below 1.00): 1.04
 Metacentric height 5.4 ft / 1.7 m
 Roll period: 18.0 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.99
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.575
 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): 0.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  32.00 ft / 9.75 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (73 %):  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: 24.32 ft / 7.41 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 114.6 %
  - Above water (accommodation/working, high = better): 183.3 %
 Waterplane Area: 53,576 Square feet or 4,977 Square metres
 Displacement factor (Displacement / loading): 99 %
 Structure weight / hull surface area: 212 lbs/sq ft or 1,035 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.32
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

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