A Ger/BB/1916 Large design from the Red Book

"Way back", I was still interested in very large (100,000 ton plus) battleships. I did a sketch design for a 105,000 ton Standard displacement ship with 9-19.75in (50cm) and 16-6in QF guns. The design was pretty good in that I forecast 280,000 SHP to reach 31 knots. The dimensions were 1,085ft x 140ft x 39ft (66ft hull depth). I took that and did a Springsharp design. The result is really good. The displacement is somewhat low at 103,391 tons Standard. The power to reach 31 knots is 297,122 SHP. Frank Fox says that the shaft loading is limited to 70,000 SHP, but Springsharp must be using a figure of about 75,000 SHP as the limit, as Springsharp does not complain about using four shafts with almost 300,000 SHP. This is the Springsharp report:

Ger/BB/1916 Large, Germany Battleship laid down 1916 (Engine 1931)

Displacement:
 99,302 t light; 103,391 t standard; 113,600 t normal; 121,767 t full load

Dimensions: Length overall / water x beam x draught
 1,090.89 ft / 1,085.00 ft x 140.00 ft x 39.00 ft (normal load)
 332.50 m / 330.71 m x 42.67 m  x 11.89 m

Armament:
      9 - 19.69" / 500 mm guns (3x3 guns), 3,813.98lbs / 1,729.99kg shells, 1916 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      16 - 6.00" / 152 mm guns (8x2 guns), 108.00lbs / 48.99kg shells, 1916 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships, 4 raised mounts - superfiring
 Weight of broadside 36,054 lbs / 16,354 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 20.0" / 508 mm 660.00 ft / 201.17 m 19.00 ft / 5.79 m
 Ends: Unarmoured
   Main Belt covers 94 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 660.00 ft / 201.17 m 38.00 ft / 11.58 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 6.00" / 152 mm  6.00" / 152 mm

   - Armour deck: 8.00" / 203 mm, Conning tower: 20.00" / 508 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 297,122 shp / 221,653 Kw = 31.00 kts
 Range 12,000nm at 18.00 kts
 Bunker at max displacement = 18,377 tons

Complement:
 3,093 - 4,022

Cost:
 £13.918 million / $55.670 million

Distribution of weights at normal displacement:
 Armament: 4,507 tons, 4.0 %
 Armour: 45,030 tons, 39.6 %
    - Belts: 10,923 tons, 9.6 %
    - Torpedo bulkhead: 7,424 tons, 6.5 %
    - Armament: 8,114 tons, 7.1 %
    - Armour Deck: 17,557 tons, 15.5 %
    - Conning Tower: 1,011 tons, 0.9 %
 Machinery: 8,885 tons, 7.8 %
 Hull, fittings & equipment: 40,880 tons, 36.0 %
 Fuel, ammunition & stores: 14,298 tons, 12.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   202,483 lbs / 91,845 Kg = 53.1 x 19.7 " / 500 mm shells or 49.4 torpedoes
 Stability (Unstable if below 1.00): 1.21
 Metacentric height 11.8 ft / 3.6 m
 Roll period: 17.1 seconds
 Steadiness - As gun platform (Average = 50 %): 64 %
   - Recoil effect (Restricted arc if above 1.00): 0.47
 Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.671
 Length to Beam Ratio: 7.75 : 1
 'Natural speed' for length: 32.94 kts
 Power going to wave formation at top speed: 47 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  37.00 ft / 11.28 m
    - Forecastle (20 %): 27.00 ft / 8.23 m
    - Mid (50 %):  27.00 ft / 8.23 m
    - Quarterdeck (15 %): 27.00 ft / 8.23 m
    - Stern:  27.00 ft / 8.23 m
    - Average freeboard: 27.80 ft / 8.47 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 65.1 %
  - Above water (accommodation/working, high = better): 197.3 %
 Waterplane Area: 118,631 Square feet or 11,021 Square metres
 Displacement factor (Displacement / loading): 115 %
 Structure weight / hull surface area: 260 lbs/sq ft or 1,267 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.05
  - Longitudinal: 0.99
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily