You can easily specify ships which are not a viable design

My original specification for a GB/CB/1915 battlecruiser would not work as specified. The beam was too narrow for the armament. I had wanted 10-15in/45 (I have used 15in/42 instead) and 16-5in QF guns. The dimensions were to be 800ft x 90ft x 26.5ft with 136,600 SHP at maximum overload power. The turrets and barbettes were 9in and the belt was 6in. I had hoped for some high speed beyond what is reasonable. I had to increase the beam to 104ft and lower the freeboard to have a design with acceptable recoil behavior. This is the Springsharp report:

GB/CB/1915, Great Britain Battlecruiser laid down 1915 (Engine 1937)

Displacement:
 33,086 t light; 35,551 t standard; 37,688 t normal; 39,397 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (807.00 ft / 800.00 ft) x 102.00 ft x (26.50 / 27.49 ft)
 (245.97 m / 243.84 m) x 31.09 m  x (8.08 / 8.38 m)

Armament:
      10 - 15.00" / 381 mm 42.0 cal guns - 1,950.00lbs / 884.51kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1915 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   1 x Twin mount on centreline, aft deck forward
      16 - 5.00" / 127 mm 45.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1915 Model
   16 x Single mounts on sides, evenly spread
  4 raised mounts
      Weight of broadside 20,540 lbs / 9,317 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 520.00 ft / 158.50 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 520.00 ft / 158.50 m 26.50 ft / 8.08 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 7.00" / 178 mm  9.00" / 229 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 9.00" / 229 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 134,829 shp / 100,582 Kw = 29.50 kts
 Range 6,500nm at 16.00 kts
 Bunker at max displacement = 3,845 tons

Complement:
 1,352 - 1,758

Cost:
 £4.656 million / $18.625 million

Distribution of weights at normal displacement:
 Armament: 2,807 tons, 7.4 %
 Armour: 10,160 tons, 27.0 %
    - Belts: 2,255 tons, 6.0 %
    - Torpedo bulkhead: 1,020 tons, 2.7 %
    - Armament: 3,303 tons, 8.8 %
    - Armour Deck: 3,365 tons, 8.9 %
    - Conning Tower: 218 tons, 0.6 %
 Machinery: 3,737 tons, 9.9 %
 Hull, fittings & equipment: 16,382 tons, 43.5 %
 Fuel, ammunition & stores: 4,602 tons, 12.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   62,036 lbs / 28,139 Kg = 36.8 x 15.0 " / 381 mm shells or 9.1 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 6.7 ft / 2.1 m
 Roll period: 16.5 seconds
 Steadiness - As gun platform (Average = 50 %): 57 %
   - Recoil effect (Restricted arc if above 1.00): 0.97
 Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.610 / 0.615
 Length to Beam Ratio: 7.84 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 50 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -3.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  33.00 ft / 10.06 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  28.00 ft / 8.53 m,  25.00 ft / 7.62 m
    - Aft deck: 17.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Quarter deck: 33.00 %,  19.00 ft / 5.79 m,  17.00 ft / 5.18 m
    - Average freeboard:  24.14 ft / 7.36 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 88.7 %
  - Above water (accommodation/working, high = better): 220.3 %
 Waterplane Area: 60,240 Square feet or 5,597 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 211 lbs/sq ft or 1,029 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.20
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

A more faithful version of the Ger/CB/1915 design study

I was looking at the three pages with information about the Ger/CB/1915 design study, and I thought that I needed to try a more faithful representation of the original design. This ended up as a 35 knot battlecruiser with 6-16.5in/45 and 12-6in/50 QF guns. The belt is 8in, inclined at 17 degrees, and is very short. The deck armour is 4in. The torpedo bulkhead is a thin 1.35in, although it is not explicitly listed. I decided that must be right, as there is another place where that thickness is used for splinter protection. The design obviously depends non lightweight machinery:

Ger/CB/1915 design study, Germany Battlecruiser laid down 1915 (Engine 1937)

Displacement:
 38,189 t light; 39,831 t standard; 42,429 t normal; 44,507 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (907.86 ft / 900.00 ft) x 100.00 ft x (30.00 / 31.16 ft)
 (276.72 m / 274.32 m) x 30.48 m  x (9.14 / 9.50 m)

Armament:
      6 - 16.50" / 419 mm 45.0 cal guns - 2,265.00lbs / 1,027.39kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1915 Model
   2 x Single mounts on centreline, forward deck forward
  1 raised mount - superfiring
      12 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1915 Model
   2 x Twin mounts on sides, forward deck forward
   4 x Twin mounts on sides, aft deck forward
      Weight of broadside 14,962 lbs / 6,787 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 415.00 ft / 126.49 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 295.00 ft / 89.92 m 8.00 ft / 2.44 m
   Main Belt covers 71 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.35" / 34 mm 415.00 ft / 126.49 m 30.00 ft / 9.14 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: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

   - Armoured deck - multiple decks: 4.00" / 102 mm For and Aft decks
 Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 8.00" / 203 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 259,880 shp / 193,871 Kw = 35.00 kts
 Range 7,500nm at 16.00 kts
 Bunker at max displacement = 4,676 tons

Complement:
 1,477 - 1,921

Cost:
 £5.463 million / $21.851 million

Distribution of weights at normal displacement:
 Armament: 3,000 tons, 7.1 %
 Armour: 10,236 tons, 24.1 %
    - Belts: 2,083 tons, 4.9 %
    - Torpedo bulkhead: 622 tons, 1.5 %
    - Armament: 2,641 tons, 6.2 %
    - Armour Deck: 4,680 tons, 11.0 %
    - Conning Tower: 210 tons, 0.5 %
 Machinery: 7,203 tons, 17.0 %
 Hull, fittings & equipment: 17,749 tons, 41.8 %
 Fuel, ammunition & stores: 4,240 tons, 10.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   59,966 lbs / 27,200 Kg = 26.7 x 16.5 " / 419 mm shells or 6.6 torpedoes
 Stability (Unstable if below 1.00): 1.10
 Metacentric height 6.0 ft / 1.8 m
 Roll period: 17.1 seconds
 Steadiness - As gun platform (Average = 50 %): 62 %
   - Recoil effect (Restricted arc if above 1.00): 0.85
 Seaboat quality  (Average = 1.00): 1.24

Hull form characteristics:
 Hull has low quarterdeck ,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.550 / 0.555
 Length to Beam Ratio: 9.00 : 1
 'Natural speed' for length: 30.00 kts
 Power going to wave formation at top speed: 53 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  37.00 ft / 11.28 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  30.00 ft / 9.14 m
    - Aft deck: 20.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
    - Quarter deck: 25.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Average freeboard:  29.30 ft / 8.93 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 106.6 %
  - Above water (accommodation/working, high = better): 247.9 %
 Waterplane Area: 62,810 Square feet or 5,835 Square metres
 Displacement factor (Displacement / loading): 111 %
 Structure weight / hull surface area: 202 lbs/sq ft or 989 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.40
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily

Another run at a Ger/CB/1915 design

There is an interesting 900ft long German battlecruiser in "The Red Book", part of my papers from the early 1970's. The ship is armed with 6-16.5in guns forward and 12-6in guns in turrets. There is minimal armour and a high speed. This is my latest attempt at a Springsharp design:

Ger/CB/1915, Germany Battlecruiser laid down 1915 (Engine 1927)

Displacement:
 40,097 t light; 42,248 t standard; 45,198 t normal; 47,558 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (907.65 ft / 900.00 ft) x 105.00 ft x (31.00 / 32.26 ft)
 (276.65 m / 274.32 m) x 32.00 m  x (9.45 / 9.83 m)

Armament:
      6 - 16.50" / 419 mm 45.0 cal guns - 2,265.21lbs / 1,027.48kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1915 Model
   2 x Triple mounts on centreline, forward deck forward
      12 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1915 Model
   2 x Twin mounts on sides, forward deck aft
   4 x Twin mounts on sides, aft deck forward
      Weight of broadside 14,963 lbs / 6,787 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 420.00 ft / 128.02 m 12.00 ft / 3.66 m
 Ends: Unarmoured
 Upper: 5.00" / 127 mm 345.00 ft / 105.16 m 8.00 ft / 2.44 m
   Main Belt covers 72 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 420.00 ft / 128.02 m 31.00 ft / 9.45 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: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 mm

   - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 8.00" / 203 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 303,169 shp / 226,164 Kw = 36.00 kts
 Range 7,500nm at 16.00 kts
 Bunker at max displacement = 5,310 tons

Complement:
 1,549 - 2,014

Cost:
 £6.042 million / $24.168 million

Distribution of weights at normal displacement:
 Armament: 2,526 tons, 5.6 %
 Armour: 9,515 tons, 21.1 %
    - Belts: 2,443 tons, 5.4 %
    - Torpedo bulkhead: 963 tons, 2.1 %
    - Armament: 2,243 tons, 5.0 %
    - Armour Deck: 3,648 tons, 8.1 %
    - Conning Tower: 219 tons, 0.5 %
 Machinery: 9,570 tons, 21.2 %
 Hull, fittings & equipment: 18,487 tons, 40.9 %
 Fuel, ammunition & stores: 5,101 tons, 11.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   57,840 lbs / 26,236 Kg = 25.8 x 16.5 " / 419 mm shells or 6.3 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 7.8 ft / 2.4 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 57 %
   - Recoil effect (Restricted arc if above 1.00): 0.60
 Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
 Hull has low quarterdeck ,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.540 / 0.546
 Length to Beam Ratio: 8.57 : 1
 'Natural speed' for length: 30.00 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  36.00 ft / 10.97 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  30.00 ft / 9.14 m
    - Aft deck: 13.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
    - Quarter deck: 37.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Average freeboard:  28.43 ft / 8.67 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 121.0 %
  - Above water (accommodation/working, high = better): 246.6 %
 Waterplane Area: 65,336 Square feet or 6,070 Square metres
 Displacement factor (Displacement / loading): 107 %
 Structure weight / hull surface area: 201 lbs/sq ft or 984 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.36
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

The Ger/BB/1905 flush deck alternative design

I have this design study and sketch for a flush-decked German battleship that looks more like a 1916 ship than a 1905 ship. The photograph of one if these ships is a pretty accurate depiction. This is what the original specification looked like:

Ger/BB/1905    Ships "A", "B", and "C" to be laid down in 1905
20,000 tons   490ft
19 knots
21,500 tons normal
27,900 SHP normal
33,500 SHP max
Dimensions: 490ft x 90ft x 29.9ft max, 27.6ft light
Hull depth=54ft
12in belt, 4in+3in decks
turrets 8in top, 8in face, 6in sides and rear
Barbettes 12in
Guns: 8-12in/45  12-6in 45
Weights:
  6920 tons Hull
   930 tons Machinery
   720 tons Aux Machinery
  1216 tons Armament
  8614 tons Protection
  1600 tons Misc

This is my Springsharp report:

Ger/BB/1905 Flush Deck, Germany Battleship laid down 1905 (Engine 1921)

Displacement:
 16,831 t light; 17,661 t standard; 19,535 t normal; 21,034 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (490.00 ft / 490.00 ft) x 90.00 ft x (28.50 / 30.21 ft)
 (149.35 m / 149.35 m) x 27.43 m  x (8.69 / 9.21 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1905 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1905 Model
   12 x Twin mounts on sides, forward deck aft
      Weight of broadside 8,000 lbs / 3,629 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 300.00 ft / 91.44 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 94 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 300.00 ft / 91.44 m 28.50 ft / 8.69 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 6.00" / 152 mm  12.0" / 305 mm
 2nd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm

   - Armoured deck - multiple decks: 4.00" / 102 mm For and Aft decks
 Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 12.00" / 305 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 28,177 shp / 21,020 Kw = 21.00 kts
 Range 8,800nm at 15.00 kts
 Bunker at max displacement = 3,373 tons

Complement:
 826 - 1,074

Cost:
 £1.437 million / $5.749 million

Distribution of weights at normal displacement:
 Armament: 1,424 tons, 7.3 %
 Armour: 7,942 tons, 40.7 %
    - Belts: 2,773 tons, 14.2 %
    - Torpedo bulkhead: 633 tons, 3.2 %
    - Armament: 2,066 tons, 10.6 %
    - Armour Deck: 2,283 tons, 11.7 %
    - Conning Tower: 188 tons, 1.0 %
 Machinery: 970 tons, 5.0 %
 Hull, fittings & equipment: 6,494 tons, 33.2 %
 Fuel, ammunition & stores: 2,704 tons, 13.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   39,822 lbs / 18,063 Kg = 46.1 x 12.0 " / 305 mm shells or 8.5 torpedoes
 Stability (Unstable if below 1.00): 1.19
 Metacentric height 5.9 ft / 1.8 m
 Roll period: 15.6 seconds
 Steadiness - As gun platform (Average = 50 %): 82 %
   - Recoil effect (Restricted arc if above 1.00): 0.59
 Seaboat quality  (Average = 1.00): 1.65

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.544 / 0.553
 Length to Beam Ratio: 5.44 : 1
 'Natural speed' for length: 22.14 kts
 Power going to wave formation at top speed: 49 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  25.00 ft / 7.62 m,  22.00 ft / 6.71 m
    - Forward deck: 30.00 %,  22.00 ft / 6.71 m,  19.00 ft / 5.79 m
    - Aft deck: 35.00 %,  19.00 ft / 5.79 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  19.97 ft / 6.09 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 64.2 %
  - Above water (accommodation/working, high = better): 137.1 %
 Waterplane Area: 30,604 Square feet or 2,843 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 162 lbs/sq ft or 790 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.91
  - Longitudinal: 2.45
  - 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

The Ger/BB/1915 design

The Ger/BB/1915 design is one where I greatly underestimated the speed that was possible with the specified power. This is a 750ft long ship of about 60,000 tons. The armament is 9-18 and 24-5in guns. The power was specified as 120,000 SHP, but the 26 knots is what Springsharp says is the top speed for that power. I had thought it would only make 20 knots. This is a much better ship than I had thought possible:

Ger/BB/1915, Germany Battleship laid down 1915 (Engine 1941)

Displacement:
 56,211 t light; 59,010 t standard; 61,470 t normal; 63,437 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (758.84 ft / 750.00 ft) x 130.00 ft x (34.00 / 34.92 ft)
 (231.30 m / 228.60 m) x 39.62 m  x (10.36 / 10.64 m)

Armament:
      9 - 18.00" / 457 mm 45.0 cal guns - 3,200.00lbs / 1,451.50kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1915 Model
   3 x Triple mounts on centreline ends, majority forward
  1 raised mount - superfiring
      24 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1915 Model
   12 x Twin mounts on sides, forward deck aft
      Weight of broadside 30,360 lbs / 13,771 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 18.0" / 457 mm 400.00 ft / 121.92 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 82 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 400.00 ft / 121.92 m 34.00 ft / 10.36 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 18.0" / 457 mm 12.0" / 305 mm  18.0" / 457 mm
 2nd: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

   - Armoured deck - multiple decks: 6.00" / 152 mm For and Aft decks
 Forecastle: 6.00" / 152 mm  Quarter deck: 6.00" / 152 mm

   - Conning towers: Forward 18.00" / 457 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 119,142 shp / 88,880 Kw = 26.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 4,427 tons

Complement:
 1,951 - 2,537

Cost:
 £7.334 million / $29.337 million

Distribution of weights at normal displacement:
 Armament: 4,501 tons, 7.3 %
 Armour: 25,361 tons, 41.3 %
    - Belts: 5,760 tons, 9.4 %
    - Torpedo bulkhead: 4,026 tons, 6.5 %
    - Armament: 6,622 tons, 10.8 %
    - Armour Deck: 8,350 tons, 13.6 %
    - Conning Tower: 604 tons, 1.0 %
 Machinery: 3,149 tons, 5.1 %
 Hull, fittings & equipment: 23,200 tons, 37.7 %
 Fuel, ammunition & stores: 5,259 tons, 8.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   115,696 lbs / 52,479 Kg = 39.7 x 18.0 " / 457 mm shells or 27.5 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 10.8 ft / 3.3 m
 Roll period: 16.6 seconds
 Steadiness - As gun platform (Average = 50 %): 68 %
   - Recoil effect (Restricted arc if above 1.00): 0.59
 Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
 Hull has a flush deck,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.649 / 0.652
 Length to Beam Ratio: 5.77 : 1
 'Natural speed' for length: 27.39 kts
 Power going to wave formation at top speed: 51 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 15.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  33.00 ft / 10.06 m,  29.00 ft / 8.84 m
    - Forward deck: 30.00 %,  29.00 ft / 8.84 m,  25.00 ft / 7.62 m
    - Aft deck: 35.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Quarter deck: 15.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Average freeboard:  26.72 ft / 8.14 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 66.1 %
  - Above water (accommodation/working, high = better): 188.9 %
 Waterplane Area: 74,622 Square feet or 6,933 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 249 lbs/sq ft or 1,214 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.77
  - 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

A very large American battleship: the US/BB/1942 Large

I have long toyed with the idea of extremely large battleships. This one is intended to be American and to be laid down in 1942. I kept the draft down to 36ft. If you can believe it, this is a battleship with 51,700 tons of protection! The speed is 30 knots and the armament is 9-21in/45 BLR, 24-5.1in/55 DP, and 56-40mm AA guns. The belt is 18in, inclined by 17 degrees and the deck and torpedo protection are both 8in. The underwater protection is very great, although the protection against gunfire is lighter. If Springsharp would allow it, I would give such a ship 9-24in guns. This is the Springsharp report:

US/BB/1942 Large, United States Battleship laid down 1942 (Engine 1950)

Displacement:
 115,064 t light; 120,858 t standard; 130,615 t normal; 138,421 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (1,198.29 ft / 1,180.00 ft) x 152.00 ft x (36.00 / 37.89 ft)
 (365.24 m / 359.66 m) x 46.33 m  x (10.97 / 11.55 m)

Armament:
      9 - 21.00" / 533 mm 45.0 cal guns - 5,000.00lbs / 2,267.96kg shells, 120 per gun
   Breech loading guns in turret on barbette mounts, 1942 Model
   3 x Triple mounts on centreline ends, majority forward
  1 raised mount - superfiring
      24 - 5.10" / 130 mm 55.0 cal guns - 71.59lbs / 32.47kg shells, 180 per gun
   Dual purpose guns in turret on barbette mounts, 1942 Model
   12 x Twin mounts on sides, forward deck aft
  4 raised mounts - superfiring
      56 - 1.57" / 40.0 mm 60.0 cal guns - 2.00lbs / 0.91kg shells, 150 per gun
   Breech loading guns in deck mounts, 1942 Model
   14 x Quad mounts on sides amidships
  8 raised mounts
      Weight of broadside 46,830 lbs / 21,242 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 18.0" / 457 mm 760.00 ft / 231.65 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 99 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 760.00 ft / 231.65 m 36.00 ft / 10.97 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 21.0" / 533 mm 14.0" / 356 mm  21.0" / 533 mm
 2nd: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 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 21.00" / 533 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 287,107 shp / 214,182 Kw = 30.00 kts
 Range 12,000nm at 18.00 kts
 Bunker at max displacement = 17,563 tons

Complement:
 3,434 - 4,465

Cost:
 £57.993 million / $231.971 million

Distribution of weights at normal displacement:
 Armament: 6,582 tons, 5.0 %
 Armour: 51,700 tons, 39.6 %
    - Belts: 10,015 tons, 7.7 %
    - Torpedo bulkhead: 8,099 tons, 6.2 %
    - Armament: 10,820 tons, 8.3 %
    - Armour Deck: 21,602 tons, 16.5 %
    - Conning Tower: 1,165 tons, 0.9 %
 Machinery: 6,869 tons, 5.3 %
 Hull, fittings & equipment: 49,914 tons, 38.2 %
 Fuel, ammunition & stores: 15,551 tons, 11.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   314,603 lbs / 142,702 Kg = 67.9 x 21.0 " / 533 mm shells or 95.0 torpedoes
 Stability (Unstable if below 1.00): 1.24
 Metacentric height 13.9 ft / 4.2 m
 Roll period: 17.1 seconds
 Steadiness - As gun platform (Average = 50 %): 74 %
   - Recoil effect (Restricted arc if above 1.00): 0.58
 Seaboat quality  (Average = 1.00): 1.48

Hull form characteristics:
 Hull has a flush deck,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.708 / 0.713
 Length to Beam Ratio: 7.76 : 1
 'Natural speed' for length: 34.35 kts
 Power going to wave formation at top speed: 43 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 20.00 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 %,  42.00 ft / 12.80 m,  35.00 ft / 10.67 m
    - Forward deck: 30.00 %,  35.00 ft / 10.67 m,  32.00 ft / 9.75 m
    - Aft deck: 35.00 %,  32.00 ft / 9.75 m,  32.00 ft / 9.75 m
    - Quarter deck: 15.00 %,  32.00 ft / 9.75 m,  32.00 ft / 9.75 m
    - Average freeboard:  33.61 ft / 10.24 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 54.2 %
  - Above water (accommodation/working, high = better): 262.6 %
 Waterplane Area: 144,788 Square feet or 13,451 Square metres
 Displacement factor (Displacement / loading): 125 %
 Structure weight / hull surface area: 273 lbs/sq ft or 1,333 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.00
  - Longitudinal: 1.01
  - 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

The Ger/BB/1916 large battleship

I have this specification and sketch of a very large German battleship with 10-21in and 24-5in guns. The speed is specified as 20 knots with 85,000 SHP. I had specified 5,000 tons of fuel oil. I tried to get the power and fuel of the original specification. I probably have too much protection, as the original had 36,884 tons of protection. The ship is short and wide at 1:6 beam to length. The Springsharp report can make more than 20 knots on the power, even with a greater displacement that is needed for adequate hull strength. This is the Springsharp report:

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

Displacement:
 87,495 t light; 91,857 t standard; 94,738 t normal; 97,042 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (915.01 ft / 900.00 ft) x 150.00 ft x (35.70 / 36.45 ft)
 (278.89 m / 274.32 m) x 45.72 m  x (10.88 / 11.11 m)

Armament:
      10 - 21.00" / 533 mm 45.0 cal guns - 4,669.98lbs / 2,118.27kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   2 x Triple mounts on centreline ends, evenly spread
   2 x Twin mounts on centreline ends, evenly spread
  2 raised mounts
      24 - 5.00" / 127 mm 50.0 cal guns - 66.16lbs / 30.01kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1916 Model
   12 x Twin mounts on sides, forward deck aft
  4 raised mounts - superfiring
      Weight of broadside 48,288 lbs / 21,903 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 18.0" / 457 mm 550.00 ft / 167.64 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 94 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 550.00 ft / 167.64 m 35.70 ft / 10.88 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 18.0" / 457 mm 12.0" / 305 mm  18.0" / 457 mm
 2nd: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

   - Armoured deck - multiple decks: 8.00" / 203 mm For and Aft decks
 Forecastle: 6.00" / 152 mm  Quarter deck: 8.00" / 203 mm

   - Conning towers: Forward 18.00" / 457 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 84,899 shp / 63,335 Kw = 22.35 kts
 Range 5,000nm at 15.00 kts
 Bunker at max displacement = 5,185 tons

Complement:
 2,699 - 3,509

Cost:
 £12.985 million / $51.940 million

Distribution of weights at normal displacement:
 Armament: 7,115 tons, 7.5 %
 Armour: 40,414 tons, 42.7 %
    - Belts: 7,624 tons, 8.0 %
    - Torpedo bulkhead: 5,812 tons, 6.1 %
    - Armament: 10,556 tons, 11.1 %
    - Armour Deck: 15,616 tons, 16.5 %
    - Conning Tower: 806 tons, 0.9 %
 Machinery: 2,539 tons, 2.7 %
 Hull, fittings & equipment: 37,427 tons, 39.5 %
 Fuel, ammunition & stores: 7,242 tons, 7.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   196,126 lbs / 88,961 Kg = 42.4 x 21.0 " / 533 mm shells or 54.0 torpedoes
 Stability (Unstable if below 1.00): 1.21
 Metacentric height 13.1 ft / 4.0 m
 Roll period: 17.4 seconds
 Steadiness - As gun platform (Average = 50 %): 79 %
   - Recoil effect (Restricted arc if above 1.00): 0.69
 Seaboat quality  (Average = 1.00): 1.58

Hull form characteristics:
 Hull has a flush deck,
   an extended bulbous bow and a round stern
 Block coefficient (normal/deep): 0.688 / 0.690
 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): 17.00 degrees
 Stern overhang: 4.00 ft / 1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  36.00 ft / 10.97 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  29.00 ft / 8.84 m
    - Aft deck: 35.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Quarter deck: 15.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Average freeboard:  30.37 ft / 9.26 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 60.1 %
  - Above water (accommodation/working, high = better): 224.3 %
 Waterplane Area: 107,048 Square feet or 9,945 Square metres
 Displacement factor (Displacement / loading): 107 %
 Structure weight / hull surface area: 284 lbs/sq ft or 1,385 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.50
  - 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

How about a very fast F/CA/1917 design study?

I have a rather cool looking sketch of a version of the F/CA/1917 with 6-11in guns. I thought it might work to have a higher speed, like 37 knots. I tried it out and have this Springsharp report:

F/CA/1917 Fast, France Armoured Cruiser laid down 1917 (Engine 1950)

Displacement:
 17,425 t light; 18,072 t standard; 18,980 t normal; 19,706 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (737.73 ft / 730.00 ft) x 80.00 ft x (25.00 / 25.68 ft)
 (224.86 m / 222.50 m) x 24.38 m  x (7.62 / 7.83 m)

Armament:
      6 - 11.00" / 279 mm 45.0 cal guns - 670.00lbs / 303.91kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1917 Model
   2 x Triple mounts on centreline, forward deck forward
      8 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1917 Model
   8 x Single mounts on sides, forward deck aft
      Weight of broadside 4,820 lbs / 2,186 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 5.00" / 127 mm 400.00 ft / 121.92 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 84 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 400.00 ft / 121.92 m 25.00 ft / 7.62 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm
 2nd: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

   - Armoured deck - multiple decks: 2.00" / 51 mm For and Aft decks
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 5.00" / 127 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 205,154 shp / 153,045 Kw = 37.00 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 1,634 tons

Complement:
 808 - 1,051

Cost:
 £3.217 million / $12.867 million

Distribution of weights at normal displacement:
 Armament: 1,002 tons, 5.3 %
 Armour: 3,473 tons, 18.3 %
    - Belts: 1,022 tons, 5.4 %
    - Torpedo bulkhead: 370 tons, 1.9 %
    - Armament: 611 tons, 3.2 %
    - Armour Deck: 1,395 tons, 7.3 %
    - Conning Tower: 77 tons, 0.4 %
 Machinery: 4,908 tons, 25.9 %
 Hull, fittings & equipment: 8,041 tons, 42.4 %
 Fuel, ammunition & stores: 1,555 tons, 8.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   21,381 lbs / 9,698 Kg = 32.1 x 11.0 " / 279 mm shells or 2.7 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 5.0 ft / 1.5 m
 Roll period: 15.1 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.45
 Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
 Hull has rise forward of midbreak,
   an extended bulbous bow and a round stern
 Block coefficient (normal/deep): 0.455 / 0.460
 Length to Beam Ratio: 9.13 : 1
 'Natural speed' for length: 27.02 kts
 Power going to wave formation at top speed: 58 %
 Trim (Max stability = 0, Max steadiness = 100): 52
 Bow angle (Positive = bow angles forward): 14.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  31.00 ft / 9.45 m,  26.00 ft / 7.92 m
    - Forward deck: 42.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Aft deck: 18.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  23.86 ft / 7.27 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 141.8 %
  - Above water (accommodation/working, high = better): 208.1 %
 Waterplane Area: 37,405 Square feet or 3,475 Square metres
 Displacement factor (Displacement / loading): 107 %
 Structure weight / hull surface area: 146 lbs/sq ft or 714 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.49
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

The Ger/DL/1916 design study

I have this sketch and short specification for a large German destroyer with 4-6in guns and 4-21in TT. There are dimensions and a displacement of 2,450 tons mentioned, but no speed. I was able to obtain a 35 knot speed. My Springsharp design came out much lighter than the 2,450 tons:

Ger/DL/1916, Germany Destroyer Leader laid down 1916 (Engine 1950)

Displacement:
 1,874 t light; 1,956 t standard; 2,151 t normal; 2,308 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (418.10 ft / 415.00 ft) x 42.00 ft x (12.00 / 12.52 ft)
 (127.44 m / 126.49 m) x 12.80 m  x (3.66 / 3.82 m)

Armament:
      4 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   3 x Single mounts on centreline ends, evenly spread
   1 x Single mount on centreline, forward deck aft
      Weight of broadside 400 lbs / 181 kg
      4 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.405 t each, 5.621 t total
 In 2 sets of deck mounted centre rotating tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm 1.00" / 25 mm  3.00" / 76 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 51,027 shp / 38,066 Kw = 35.00 kts
 Range 4,500nm at 15.00 kts
 Bunker at max displacement = 352 tons

Complement:
 157 - 205

Cost:
 £0.412 million / $1.647 million

Distribution of weights at normal displacement:
 Armament: 121 tons, 5.6 %
    - Guns: 116 tons, 5.4 %
    - Torpedoes: 6 tons, 0.3 %
 Armour: 41 tons, 1.9 %
    - Armament: 41 tons, 1.9 %
 Machinery: 1,035 tons, 48.1 %
 Hull, fittings & equipment: 677 tons, 31.5 %
 Fuel, ammunition & stores: 277 tons, 12.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   712 lbs / 323 Kg = 6.6 x 6.0 " / 152 mm shells or 0.4 torpedoes
 Stability (Unstable if below 1.00): 1.32
 Metacentric height 2.2 ft / 0.7 m
 Roll period: 11.8 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.31
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.360 / 0.370
 Length to Beam Ratio: 9.88 : 1
 'Natural speed' for length: 20.37 kts
 Power going to wave formation at top speed: 63 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 1.00 ft / 0.30 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 15.00 %,  24.00 ft / 7.32 m,  22.00 ft / 6.71 m
    - Forward deck: 14.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 56.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Quarter deck: 15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Average freeboard:  16.44 ft / 5.01 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 172.8 %
  - Above water (accommodation/working, high = better): 162.5 %
 Waterplane Area: 10,462 Square feet or 972 Square metres
 Displacement factor (Displacement / loading): 75 %
 Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.49
  - Longitudinal: 1.46
  - Overall: 0.54
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

A Ger/BB/1916 design study

This design study, that I am calling the Ger/BB/1916, is for a 28.5 knot ship with 12-16.5in and 16-6in QF guns. The original specification hoped for a 60,000 ton ship, but that is too small. Looking the weights, I gave my Springsharp design better protection than I had originally planned and that accounts for the larger size. I had envisioned that the weights would be like this:

21,020 tons  hull
 6,700 tons  machinery
 3,810 tons  armament
23,670 tons  protection
 4,800 tons  miscellaneous

This is the Springsharp report:

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

Displacement:
 64,844 t light; 67,774 t standard; 71,905 t normal; 75,210 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (932.65 ft / 920.00 ft) x 120.00 ft x (32.80 / 34.11 ft)
 (284.27 m / 280.42 m) x 36.58 m  x (10.00 / 10.40 m)

Armament:
      12 - 16.50" / 419 mm 45.0 cal guns - 2,265.00lbs / 1,027.39kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   4 x Triple mounts on centreline forward
  2 raised mounts - superfiring
      16 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1916 Model
   8 x Twin mounts on sides, forward deck aft
  4 raised mounts - superfiring
      Weight of broadside 28,780 lbs / 13,054 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 15.0" / 381 mm 640.00 ft / 195.07 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 107 % of normal length

   - Torpedo Bulkhead:
  6.00" / 152 mm 640.00 ft / 195.07 m 32.80 ft / 10.00 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 15.0" / 381 mm 11.0" / 279 mm  15.0" / 381 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armoured deck - multiple decks: 6.00" / 152 mm For and Aft decks
 Forecastle: 6.00" / 152 mm  Quarter deck: 6.00" / 152 mm

   - Conning towers: Forward 15.00" / 381 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 172,832 shp / 128,932 Kw = 28.50 kts
 Range 8,500nm at 16.00 kts
 Bunker at max displacement = 7,436 tons

Complement:
 2,195 - 2,854

Cost:
 £9.271 million / $37.083 million

Distribution of weights at normal displacement:
 Armament: 4,820 tons, 6.7 %
 Armour: 29,083 tons, 40.4 %
    - Belts: 6,929 tons, 9.6 %
    - Torpedo bulkhead: 4,660 tons, 6.5 %
    - Armament: 7,078 tons, 9.8 %
    - Armour Deck: 9,857 tons, 13.7 %
    - Conning Tower: 559 tons, 0.8 %
 Machinery: 4,790 tons, 6.7 %
 Hull, fittings & equipment: 26,151 tons, 36.4 %
 Fuel, ammunition & stores: 7,061 tons, 9.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   131,549 lbs / 59,670 Kg = 58.6 x 16.5 " / 419 mm shells or 28.6 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 8.1 ft / 2.5 m
 Roll period: 17.7 seconds
 Steadiness - As gun platform (Average = 50 %): 70 %
   - Recoil effect (Restricted arc if above 1.00): 0.83
 Seaboat quality  (Average = 1.00): 1.39

Hull form characteristics:
 Hull has a flush deck,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.695 / 0.699
 Length to Beam Ratio: 7.67 : 1
 'Natural speed' for length: 30.33 kts
 Power going to wave formation at top speed: 47 %
 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 %,  36.00 ft / 10.97 m,  30.00 ft / 9.14 m
    - Forward deck: 30.00 %,  30.00 ft / 9.14 m,  26.00 ft / 7.92 m
    - Aft deck: 35.00 %,  26.00 ft / 7.92 m,  27.00 ft / 8.23 m
    - Quarter deck: 15.00 %,  27.00 ft / 8.23 m,  28.00 ft / 8.53 m
    - Average freeboard:  28.28 ft / 8.62 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 67.6 %
  - Above water (accommodation/working, high = better): 207.9 %
 Waterplane Area: 88,093 Square feet or 8,184 Square metres
 Displacement factor (Displacement / loading): 111 %
 Structure weight / hull surface area: 232 lbs/sq ft or 1,131 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.15
  - 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