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Tuesday, January 16, 2007

My anachronistic Lion design

Another anachronistic design from 1988 had the battlecruiser Lion with a flush deck, a raked bow, and a Renown look. There were twin funnels and pole masts with tripod legs. The secondary armament 8 twin 4in QF mounts. This is the Springsharp report:
Lion, Great Britain Battlecruiser laid down 1912

Displacement:
 24,988 t light; 26,092 t standard; 29,000 t normal; 31,326 t full load

Dimensions: Length overall / water x beam x draught
 700.91 ft / 700.00 ft x 88.00 ft x 27.00 ft (normal load)
 213.64 m / 213.36 m x 26.82 m  x 8.23 m

Armament:
      8 - 13.50" / 343 mm guns (3 mounts), 1,230.19lbs / 558.00kg shells, 1912 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      16 - 4.00" / 102 mm guns (8x2 guns), 32.00lbs / 14.51kg shells, 1912 Model
   Quick firing guns in deck mounts with hoists
   on side, evenly spread, all raised mounts
 Weight of broadside 10,354 lbs / 4,696 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 9.00" / 229 mm 440.00 ft / 134.11 m 16.00 ft / 4.88 m
 Ends: 5.00" / 127 mm 260.00 ft / 79.25 m 12.00 ft / 3.66 m
   Main Belt covers 97 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 440.00 ft / 134.11 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 7.00" / 178 mm  9.00" / 229 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 96,871 shp / 72,266 Kw = 28.00 kts
 Range 5,600nm at 15.00 kts
 Bunker at max displacement = 5,234 tons (100% coal)

Complement:
 1,110 - 1,444

Cost:
 £2.557 million / $10.226 million

Distribution of weights at normal displacement:
 Armament: 1,294 tons, 4.5 %
 Armour: 8,775 tons, 30.3 %
    - Belts: 3,304 tons, 11.4 %
    - Torpedo bulkhead: 879 tons, 3.0 %
    - Armament: 1,885 tons, 6.5 %
    - Armour Deck: 2,525 tons, 8.7 %
    - Conning Tower: 183 tons, 0.6 %
 Machinery: 4,249 tons, 14.7 %
 Hull, fittings & equipment: 10,670 tons, 36.8 %
 Fuel, ammunition & stores: 4,012 tons, 13.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   36,077 lbs / 16,364 Kg = 29.3 x 13.5 " / 343 mm shells or 5.1 torpedoes
 Stability (Unstable if below 1.00): 1.19
 Metacentric height 5.7 ft / 1.7 m
 Roll period: 15.5 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.55
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.610
 Length to Beam Ratio: 7.95 : 1
 'Natural speed' for length: 26.46 kts
 Power going to wave formation at top speed: 51 %
 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:  26.00 ft / 7.92 m
    - Forecastle (20 %): 19.00 ft / 5.79 m
    - Mid (50 %):  19.00 ft / 5.79 m
    - Quarterdeck (15 %): 19.00 ft / 5.79 m
    - Stern:  19.00 ft / 5.79 m
    - Average freeboard: 19.56 ft / 5.96 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 105.1 %
  - Above water (accommodation/working, high = better): 148.3 %
 Waterplane Area: 45,487 Square feet or 4,226 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 168 lbs/sq ft or 818 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.00
  - Longitudinal: 1.04
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

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