The Ger/BB/1916 "Large" design

I did not give the very large battleship a designation, but I am calling it the Ger/BB/1916 Large. This is a nominally 105,000 ton ship with 9-19.75in guns and a speed of 31 knots. I was impressed at how good my power estimate was, consideringthat it was very much a "back of the envelope" estimate, based on smaller, example ships. This is my original specification:

Displacement: 105,000 tons  Dimensions: 1085ft x 140ft x 66ft (depth)
9-19.75in guns (238 tons)  280,000 SHP = 31k knots
Weights:
24,070 tons Hull
 7,000 tons Machinery (40 SHP/ton)
56,382 tons Protection
 4,000 tons Auxiliary Machinery
 8,400 tons Miscellaneous

This is the Springsharp report:

Ger/BB/1916 Large, Germany Battleship laid down 1916 (Engine 1937)

Displacement:
 95,188 t light; 100,374 t standard; 106,972 t normal; 112,251 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (1,098.45 ft / 1,085.00 ft) x 140.00 ft x (39.00 / 40.61 ft)
 (334.81 m / 330.71 m) x 42.67 m  x (11.89 / 12.38 m)

Armament:
      9 - 19.75" / 502 mm 45.0 cal guns - 3,885.00lbs / 1,762.21kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   3 x Triple mounts on centreline ends, majority forward
  1 raised mount - superfiring
      16 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   8 x Twin mounts on sides, forward deck aft
  4 raised mounts - superfiring
      Weight of broadside 36,565 lbs / 16,586 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 18.0" / 457 mm 670.00 ft / 204.22 m 18.00 ft / 5.49 m
 Ends: Unarmoured
   Main Belt covers 95 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 670.00 ft / 204.22 m 39.00 ft / 11.89 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 20.0" / 508 mm 12.0" / 305 mm  20.0" / 508 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armoured deck - multiple decks: 8.00" / 203 mm For and Aft decks
 Forecastle: 8.00" / 203 mm  Quarter deck: 8.00" / 203 mm

   - Conning towers: Forward 20.00" / 508 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 282,258 shp / 210,565 Kw = 31.00 kts
 Range 12,500nm at 15.00 kts
 Bunker at max displacement = 11,877 tons

Complement:
 2,956 - 3,844

Cost:
 £12.887 million / $51.549 million

Distribution of weights at normal displacement:
 Armament: 5,615 tons, 5.2 %
 Armour: 43,236 tons, 40.4 %
    - Belts: 9,356 tons, 8.7 %
    - Torpedo bulkhead: 7,734 tons, 7.2 %
    - Armament: 8,098 tons, 7.6 %
    - Armour Deck: 17,076 tons, 16.0 %
    - Conning Tower: 971 tons, 0.9 %
 Machinery: 7,823 tons, 7.3 %
 Hull, fittings & equipment: 38,514 tons, 36.0 %
 Fuel, ammunition & stores: 11,785 tons, 11.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   205,907 lbs / 93,398 Kg = 53.5 x 19.8 " / 502 mm shells or 51.8 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 11.6 ft / 3.5 m
 Roll period: 17.3 seconds
 Steadiness - As gun platform (Average = 50 %): 75 %
   - Recoil effect (Restricted arc if above 1.00): 0.60
 Seaboat quality  (Average = 1.00): 1.49

Hull form characteristics:
 Hull has a flush deck,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.632 / 0.637
 Length to Beam Ratio: 7.75 : 1
 'Natural speed' for length: 32.94 kts
 Power going to wave formation at top speed: 46 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 15.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  39.00 ft / 11.89 m,  33.00 ft / 10.06 m
    - Forward deck: 30.00 %,  33.00 ft / 10.06 m,  29.00 ft / 8.84 m
    - Aft deck: 35.00 %,  29.00 ft / 8.84 m,  30.00 ft / 9.14 m
    - Quarter deck: 15.00 %,  30.00 ft / 9.14 m,  31.00 ft / 9.45 m
    - Average freeboard:  31.28 ft / 9.53 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 63.7 %
  - Above water (accommodation/working, high = better): 222.7 %
 Waterplane Area: 114,452 Square feet or 10,633 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 256 lbs/sq ft or 1,250 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.13
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily