The Ger/CB/1906 design

The Ger/CB/1906 design was not viable as originally specified. There was grossly inadequate hull weight, and the protection weight greatly understated what was needed to implement 4in belt, 3in deck, and 6in turrets and barbettes. I had to go with lightweight machinery and a greater displacement to make the original concept work. This is the Springsharp report:

Ger/CB/1906, Germany Battlecruiser laid down 1906 (Engine 1917)

Displacement:
 24,874 t light; 25,820 t standard; 28,800 t normal; 31,184 t full load

Dimensions: Length overall / water x beam x draught
 800.00 ft / 800.00 ft x 85.00 ft x 26.00 ft (normal load)
 243.84 m / 243.84 m x 25.91 m  x 7.92 m

Armament:
      8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1906 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1906 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships
 Weight of broadside 7,296 lbs / 3,309 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 425.00 ft / 129.54 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 82 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 425.00 ft / 129.54 m 26.00 ft / 7.92 m

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

   - Armour deck: 3.00" / 76 mm, Conning tower: 6.00" / 152 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 169,796 shp / 126,668 Kw = 33.00 kts
 Range 6,500nm at 18.00 kts
 Bunker at max displacement = 5,365 tons

Complement:
 1,105 - 1,437

Cost:
 £2.508 million / $10.032 million

Distribution of weights at normal displacement:
 Armament: 912 tons, 3.2 %
 Armour: 6,212 tons, 21.6 %
    - Belts: 1,181 tons, 4.1 %
    - Torpedo bulkhead: 818 tons, 2.8 %
    - Armament: 1,408 tons, 4.9 %
    - Armour Deck: 2,684 tons, 9.3 %
    - Conning Tower: 121 tons, 0.4 %
 Machinery: 6,224 tons, 21.6 %
 Hull, fittings & equipment: 11,525 tons, 40.0 %
 Fuel, ammunition & stores: 3,926 tons, 13.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   37,449 lbs / 16,987 Kg = 43.3 x 12.0 " / 305 mm shells or 4.4 torpedoes
 Stability (Unstable if below 1.00): 1.18
 Metacentric height 5.3 ft / 1.6 m
 Roll period: 15.4 seconds
 Steadiness - As gun platform (Average = 50 %): 61 %
   - Recoil effect (Restricted arc if above 1.00): 0.66
 Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.570
 Length to Beam Ratio: 9.41 : 1
 'Natural speed' for length: 28.28 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: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  35.00 ft / 10.67 m
    - Forecastle (20 %): 28.00 ft / 8.53 m
    - Mid (69 %):  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): 123.0 %
  - Above water (accommodation/working, high = better): 217.0 %
 Waterplane Area: 48,362 Square feet or 4,493 Square metres
 Displacement factor (Displacement / loading): 111 %
 Structure weight / hull surface area: 157 lbs/sq ft or 768 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.15
  - 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