German fast battleship: Ger/BB/1917

A pencil sketch and some minimal specifications is all there is for what I am calling the Ger/BB/1917 battleship. The basic concept was for a 50,000 ton fast German battleship armed with 9-18in and 20-5in guns. In reality, 50,000 tons is not sufficient for the goals. I was able to stay close, with a 53,869 ton Standard displacement. The armour basis is 14in. I had not noticed that the rounds per gun for the main armament was defaulted to 150. When I corrected that, I was able to achieve the desired 30-knot speed. This is the Springsharp report:

Ger/BB/1917 fast, Germany Battleship laid down 1917 (Engine 1927)

Displacement:
 50,989 t light; 53,498 t standard; 56,100 t normal; 58,182 t full load

Dimensions: Length overall / water x beam x draught
 823.31 ft / 820.00 ft x 112.00 ft x 33.00 ft (normal load)
 250.94 m / 249.94 m x 34.14 m  x 10.06 m

Armament:
      9 - 18.00" / 457 mm guns (3x3 guns), 2,916.00lbs / 1,322.68kg shells, 1917 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1917 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships, 6 raised mounts - superfiring
 Weight of broadside 27,494 lbs / 12,471 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 470.00 ft / 143.26 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 88 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  4.00" / 102 mm 470.00 ft / 143.26 m 31.00 ft / 9.45 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 9.00" / 229 mm  14.0" / 356 mm
 2nd: 5.00" / 127 mm 5.00" / 127 mm  5.00" / 127 mm

   - Armour deck: 5.00" / 127 mm, Conning tower: 14.00" / 356 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 185,281 shp / 138,220 Kw = 30.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 4,684 tons

Complement:
 1,822 - 2,369

Cost:
 £9.982 million / $39.929 million

Distribution of weights at normal displacement:
 Armament: 3,437 tons, 6.1 %
 Armour: 19,055 tons, 34.0 %
    - Belts: 4,963 tons, 8.8 %
    - Torpedo bulkhead: 2,156 tons, 3.8 %
    - Armament: 4,998 tons, 8.9 %
    - Armour Deck: 6,495 tons, 11.6 %
    - Conning Tower: 442 tons, 0.8 %
 Machinery: 5,849 tons, 10.4 %
 Hull, fittings & equipment: 22,648 tons, 40.4 %
 Fuel, ammunition & stores: 5,111 tons, 9.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   68,206 lbs / 30,938 Kg = 23.4 x 18.0 " / 457 mm shells or 10.3 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 7.0 ft / 2.1 m
 Roll period: 17.8 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.80
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.648
 Length to Beam Ratio: 7.32 : 1
 'Natural speed' for length: 28.64 kts
 Power going to wave formation at top speed: 53 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 4.00 degrees
 Stern overhang: 1.00 ft / 0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  33.00 ft / 10.06 m
    - Forecastle (20 %): 24.00 ft / 7.32 m
    - Mid (50 %):  24.00 ft / 7.32 m
    - Quarterdeck (15 %): 24.00 ft / 7.32 m
    - Stern:  24.00 ft / 7.32 m
    - Average freeboard: 24.72 ft / 7.53 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 97.1 %
  - Above water (accommodation/working, high = better): 176.2 %
 Waterplane Area: 70,217 Square feet or 6,523 Square metres
 Displacement factor (Displacement / loading): 96 %
 Structure weight / hull surface area: 235 lbs/sq ft or 1,145 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.25
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent