The GB/CB/1905 from August 31, 2001

This is a much better drawing than the GB/CB/1907. I need to scan the drawings and post them, for posterity. The GB/CB/1905 drawing was good enough that I had made it into a wargame piece back 2001. When I lost my hard disk in the fall of 2002, the scan was lost. Anyway, for whatever reason, the GB/CB/1905 design is working extremely well in Springsharp. It would be tempting to increase the belt armor, but I refrained, to retain the elements of the original design. I did increase turret, barbette, and conning tower to use up growth capacity in the design and to raise the center of gravity, to increase the roll period to above 14 seconds, which is lower than I like. This design is 770ft x 85ft x 27ft, with a normal displacement of 26,500 tons. The armament is the usual 4-12in/45 BLR and 9-6in/50 QF guns. The speed is 33 knots maximum with a range of 7,500 miles at 15 knots. This is the Springsharp report:

GB/CB/1905, Great Britain Battlecruiser laid down 1905 (Engine 1909)

Displacement:
 22,731 t light; 23,465 t standard; 26,500 t normal; 28,928 t full load

Dimensions: Length overall / water x beam x draught
 770.00 ft / 770.00 ft x 85.00 ft x 27.00 ft (normal load)
 234.70 m / 234.70 m x 25.91 m  x 8.23 m

Armament:
      4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1905 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1905 Model
   Quick firing guns in deck mounts with hoists
   on side, evenly spread
      1 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1905 Model
   Quick firing gun in a deck mount with hoist
   on centreline aft
 Weight of broadside 4,428 lbs / 2,009 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 495.00 ft / 150.88 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 4.00" / 102 mm 425.00 ft / 129.54 m 8.00 ft / 2.44 m
   Main Belt covers 99 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 495.00 ft / 150.88 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 10.0" / 254 mm 6.00" / 152 mm  10.0" / 254 mm
 2nd: 3.00" / 76 mm 2.00" / 51 mm  2.00" / 51 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 10.00" / 254 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 160,984 shp / 120,094 Kw = 33.00 kts
 Range 7,500nm at 15.00 kts
 Bunker at max displacement = 5,463 tons

Complement:
 1,038 - 1,350

Cost:
 £2.285 million / $9.140 million

Distribution of weights at normal displacement:
 Armament: 554 tons, 2.1 %
 Armour: 4,869 tons, 18.4 %
    - Belts: 1,339 tons, 5.1 %
    - Torpedo bulkhead: 714 tons, 2.7 %
    - Armament: 973 tons, 3.7 %
    - Armour Deck: 1,651 tons, 6.2 %
    - Conning Tower: 191 tons, 0.7 %
 Machinery: 7,317 tons, 27.6 %
 Hull, fittings & equipment: 9,992 tons, 37.7 %
 Fuel, ammunition & stores: 3,769 tons, 14.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   30,876 lbs / 14,005 Kg = 35.7 x 12.0 " / 305 mm shells or 3.5 torpedoes
 Stability (Unstable if below 1.00): 1.29
 Metacentric height 6.2 ft / 1.9 m
 Roll period: 14.4 seconds
 Steadiness - As gun platform (Average = 50 %): 66 %
   - Recoil effect (Restricted arc if above 1.00): 0.35
 Seaboat quality  (Average = 1.00): 1.32

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.525
 Length to Beam Ratio: 9.06 : 1
 'Natural speed' for length: 27.75 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: -1.00 ft / -0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  31.00 ft / 9.45 m
    - Forecastle (20 %): 28.00 ft / 8.53 m
    - Mid (73 %):  28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
    - Quarterdeck (15 %): 20.00 ft / 6.10 m
    - Stern:  20.00 ft / 6.10 m
    - Average freeboard: 26.08 ft / 7.95 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 137.7 %
  - Above water (accommodation/working, high = better): 217.2 %
 Waterplane Area: 44,617 Square feet or 4,145 Square metres
 Displacement factor (Displacement / loading): 111 %
 Structure weight / hull surface area: 145 lbs/sq ft or 707 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.31
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily