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Wednesday, November 26, 2008

The GB/CB/1916 (Hood style)

I had this concept for a variant of the GB/CB/1916 design that would rather Hood-like with 9-16.5in/45 and 16-6in QF guns with a 32.5 knot speed. The thickest part of the belt is 12in and the ship uses "all or nothing" protection. The "look" is similar to the 36-knot ship, which is an intermediate type between the Repulse and the Hood.
GB/CB/1916, Great Britain Battlecruiser laid down 1916 (Engine 1923)

Displacement:
 49,840 t light; 52,115 t standard; 55,152 t normal; 57,581 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (921.17 ft / 915.00 ft) x 112.00 ft x (34.00 / 35.18 ft)
 (280.77 m / 278.89 m) x 34.14 m  x (10.36 / 10.72 m)

Armament:
      9 - 16.50" / 419 mm 45.0 cal guns - 2,265.01lbs / 1,027.39kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   3 x Triple mounts on centreline ends, majority forward
      16 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   8 x Single mounts on sides, forward deck aft
  2 raised mounts - superfiring
   8 x Single mounts on sides, aft deck forward
  2 raised mounts - superfiring
      Weight of broadside 22,214 lbs / 10,076 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 635.00 ft / 193.55 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 9.00" / 229 mm 635.00 ft / 193.55 m 8.00 ft / 2.44 m
   Main Belt covers 107 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 635.00 ft / 193.55 m 34.00 ft / 10.36 m
 Beam between torpedo bulkheads 78.00 ft / 23.77 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 10.0" / 254 mm  14.0" / 356 mm
 2nd: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 mm

   - Armoured deck - multiple decks:
 For and Aft decks: 4.00" / 102 mm
 Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 14.00" / 356 mm, Aft 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 229,235 shp / 171,009 Kw = 32.50 kts
 Range 6,500nm at 16.00 kts
 Bunker at max displacement = 5,466 tons

Complement:
 1,799 - 2,339

Cost:
 £8.033 million / $32.132 million

Distribution of weights at normal displacement:
 Armament: 3,807 tons, 6.9 %
    - Guns: 3,807 tons, 6.9 %
 Armour: 16,802 tons, 30.5 %
    - Belts: 4,752 tons, 8.6 %
    - Torpedo bulkhead: 1,598 tons, 2.9 %
    - Armament: 4,388 tons, 8.0 %
    - Armour Deck: 5,346 tons, 9.7 %
    - Conning Towers: 718 tons, 1.3 %
 Machinery: 7,662 tons, 13.9 %
 Hull, fittings & equipment: 21,570 tons, 39.1 %
 Fuel, ammunition & stores: 5,311 tons, 9.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   77,326 lbs / 35,075 Kg = 34.4 x 16.5 " / 419 mm shells or 10.4 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 7.5 ft / 2.3 m
 Roll period: 17.1 seconds
 Steadiness - As gun platform (Average = 50 %): 62 %
   - Recoil effect (Restricted arc if above 1.00): 0.74
 Seaboat quality  (Average = 1.00): 1.24

Hull form characteristics:
 Hull has low quarterdeck ,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.554 / 0.559
 Length to Beam Ratio: 8.17 : 1
 'Natural speed' for length: 30.25 kts
 Power going to wave formation at top speed: 51 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 10.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  35.00 ft / 10.67 m,  30.00 ft / 9.14 m
    - Forward deck: 30.00 %,  30.00 ft / 9.14 m,  29.00 ft / 8.84 m
    - Aft deck: 17.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Quarter deck: 33.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Average freeboard:  27.44 ft / 8.36 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 114.1 %
  - Above water (accommodation/working, high = better): 222.9 %
 Waterplane Area: 71,789 Square feet or 6,669 Square metres
 Displacement factor (Displacement / loading): 106 %
 Structure weight / hull surface area: 221 lbs/sq ft or 1,080 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.23
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Good seaboat, rides out heavy weather easily

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