The Ger/BB/1916 Design Study revisited

The Ger/BB/1916 design is rather short and tubby for the displacement that is required. I had to increase the armored citadel length to satisfy Springsharp. The normal displacement is not almost 100,000 tons (on only a 900ft length). I had overoptimistically (according to Springsharp) hoped for a 510 ft citadel length and an 80,000 toon standard displacement. Springsharp puts the standard displacement at 91,904 tons. The Springsharp normal displacement is 99,005 tons. Since I had budgeted 85,000 SHP for machinery, I was able to get 22 knots rather than the expected 20 knots. This is the Springsharp report:

Ger/BB/1916 design study, Germany Battleship laid down 1916 (Engine 1921)

Displacement:
 86,820 t light; 91,379 t standard; 98,450 t normal; 104,107 t full load

Dimensions: Length overall / water x beam x draught
 905.10 ft / 900.00 ft x 150.00 ft x 36.00 ft (normal load)
 275.87 m / 274.32 m x 45.72 m  x 10.97 m

Armament:
     10 - 21.00" / 533 mm guns (4 mounts), 5,000.00lbs / 2,267.96kg shells, 1916 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
     24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1916 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships, 4 raised mounts - superfiring
 Weight of broadside 51,500 lbs / 23,360 kg
 Shells per gun, main battery: 90

Armour:
  - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 17.0" / 432 mm 510.00 ft / 155.45 m 18.00 ft / 5.49 m
 Ends: Unarmoured
   Main Belt covers 87 % of normal length

  - Torpedo Bulkhead:
  3.00" / 76 mm 510.00 ft / 155.45 m 33.00 ft / 10.06 m

  - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 17.0" / 432 mm 11.0" / 279 mm  17.0" / 432 mm
 2nd: 5.00" / 127 mm 5.00" / 127 mm  5.00" / 127 mm

  - Armour deck: 8.00" / 203 mm, Conning tower: 17.00" / 432 mm

Machinery:
 Oil fired boilers, steam turbines,
 Geared drive, 4 shafts, 82,514 shp / 61,555 Kw = 22.00 kts
 Range 12,000nm at 15.00 kts
 Bunker at max displacement = 12,728 tons

Complement:
 2,778 - 3,612

Cost:
 £13.837 million / $55.348 million

Distribution of weights at normal displacement:
 Armament: 5,976 tons, 6.1 %
 Armour: 37,108 tons, 37.7 %
    - Belts: 7,169 tons, 7.3 %
    - Torpedo bulkhead: 1,868 tons, 1.9 %
    - Armament: 11,146 tons, 11.3 %
    - Armour Deck: 16,143 tons, 16.4 %
    - Conning Tower: 781 tons, 0.8 %
 Machinery: 2,841 tons, 2.9 %
 Hull, fittings & equipment: 40,895 tons, 41.5 %
 Fuel, ammunition & stores: 11,630 tons, 11.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   187,929 lbs / 85,243 Kg = 40.6 x 21.0 " / 533 mm shells or 36.7 torpedoes
 Stability (Unstable if below 1.00): 1.11
 Metacentric height 11.1 ft / 3.4 m
 Roll period: 18.9 seconds
 Steadiness - As gun platform (Average = 50 %): 83 %
   - Recoil effect (Restricted arc if above 1.00): 0.86
 Seaboat quality  (Average = 1.00): 1.66

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.709
 Length to Beam Ratio: 6.00 : 1
 'Natural speed' for length: 30.00 kts
 Power going to wave formation at top speed: 38 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  40.00 ft / 12.19 m
    - Forecastle (20 %): 32.00 ft / 9.75 m
    - Mid (50 %):  32.00 ft / 9.75 m
    - Quarterdeck (15 %): 32.00 ft / 9.75 m
    - Stern:  32.00 ft / 9.75 m
    - Average freeboard: 32.64 ft / 9.95 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 64.0 %
  - Above water (accommodation/working, high = better): 239.3 %
 Waterplane Area: 109,075 Square feet or 10,133 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 288 lbs/sq ft or 1,404 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.61
  - 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
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather

For comparison, this was my original weight budget:

• Machinery=2,840 tons
• Aux. Machinery=3,000 tons
• Hull=24,000 tons
• Armament=6,876 tons
• Protection=36,884 tons
• Miscellaneous=6,400 tons