Amazon Ad

Wednesday, January 17, 2007

A version of the anachronistic Lion with oil-fired boilers

As you might expect, the anachronistic version of the Lion, when given oil-fired boilers, is more capable. My choice is to mostly use the added capability to provide an 18 knot cruising speed for 5,700nm. I hesitate to give the ship a higher maximum speed, given the relatively low freeboard. This is the Springsharp report:
Lion, Great Britain Battlecruiser laid down 1912

Displacement:
 24,566 t light; 25,668 t standard; 28,900 t normal; 31,485 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:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 96,584 shp / 72,051 Kw = 28.00 kts
 Range 5,700nm at 18.00 kts
 Bunker at max displacement = 5,817 tons

Complement:
 1,107 - 1,440

Cost:
 £2.486 million / $9.944 million

Distribution of weights at normal displacement:
 Armament: 1,294 tons, 4.5 %
 Armour: 8,769 tons, 30.3 %
    - Belts: 3,304 tons, 11.4 %
    - Torpedo bulkhead: 879 tons, 3.0 %
    - Armament: 1,885 tons, 6.5 %
    - Armour Deck: 2,520 tons, 8.7 %
    - Conning Tower: 183 tons, 0.6 %
 Machinery: 3,851 tons, 13.3 %
 Hull, fittings & equipment: 10,651 tons, 36.9 %
 Fuel, ammunition & stores: 4,334 tons, 15.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   37,875 lbs / 17,180 Kg = 30.8 x 13.5 " / 343 mm shells or 5.6 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: 0.608
 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): 99.7 %
  - Above water (accommodation/working, high = better): 148.4 %
 Waterplane Area: 45,398 Square feet or 4,218 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 168 lbs/sq ft or 818 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.00
  - Longitudinal: 1.05
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

No comments:

Amazon Context Links