The extended version of the Ger/CB/1906 design

In 1973, I had experimented with the Ger/CB/1906 design, and thought that I ought to be able to achieve a combination of higher speed and slightly better protection. The better protection was achievable, but with Springsharp, with pretty lightweight machinery, I was just barely able to keep the 33 knot speed. The basic concept for the Ger/CB/1906 was a 25,000 ton Standard displacement ship with a shallow draft, that could achieve 33 knots with 8-12in guns. The armour basis was chosen as 4in, to facilitate that sort of speed. This is the Springsharp report:

Ger/CB/1906 extended version, Germany Battlecruiser laid down 1906 (Engine 1931)

Displacement:
 24,240 t light; 25,186 t standard; 27,500 t normal; 29,351 t full load

Dimensions: Length overall / water x beam x draught
 800.00 ft / 800.00 ft x 85.00 ft x 25.60 ft (normal load)
 243.84 m / 243.84 m x 25.91 m  x 7.80 m

Armament:
      8 - 12.00" / 305 mm guns (4 mounts), 864.00lbs / 391.90kg shells, 1906 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 5 raised guns - superfiring
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1906 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships
 Weight of broadside 7,776 lbs / 3,527 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 450.00 ft / 137.16 m 18.00 ft / 5.49 m
 Ends: Unarmoured
   Main Belt covers 87 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 450.00 ft / 137.16 m 25.00 ft / 7.62 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 6.00" / 152 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 163,892 shp / 122,263 Kw = 33.00 kts
 Range 6,400nm at 18.00 kts
 Bunker at max displacement = 4,165 tons

Complement:
 1,067 - 1,388

Cost:
 £2.351 million / $9.404 million

Distribution of weights at normal displacement:
 Armament: 972 tons, 3.5 %
 Armour: 6,630 tons, 24.1 %
    - Belts: 1,392 tons, 5.1 %
    - Torpedo bulkhead: 624 tons, 2.3 %
    - Armament: 1,816 tons, 6.6 %
    - Armour Deck: 2,641 tons, 9.6 %
    - Conning Tower: 157 tons, 0.6 %
 Machinery: 4,901 tons, 17.8 %
 Hull, fittings & equipment: 11,737 tons, 42.7 %
 Fuel, ammunition & stores: 3,260 tons, 11.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   38,862 lbs / 17,628 Kg = 45.0 x 12.0 " / 305 mm shells or 4.8 torpedoes
 Stability (Unstable if below 1.00): 1.10
 Metacentric height 4.7 ft / 1.4 m
 Roll period: 16.4 seconds
 Steadiness - As gun platform (Average = 50 %): 60 %
   - Recoil effect (Restricted arc if above 1.00): 0.78
 Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.553
 Length to Beam Ratio: 9.41 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 52 %
 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:  32.00 ft / 9.75 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: 25.84 ft / 7.88 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 110.6 %
  - Above water (accommodation/working, high = better): 221.1 %
 Waterplane Area: 47,586 Square feet or 4,421 Square metres
 Displacement factor (Displacement / loading): 114 %
 Structure weight / hull surface area: 163 lbs/sq ft or 796 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.15
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent