A reader drew the "Fujimoto Dream Battleship" to my attention

I received an email with images and data for the "Fujimoto Dream Battleship" last night. As specified, the design is totally unworkable. In order to achieve their specifications, 12-20in BLR, 16-6.1in QF, 18-5in DP guns, 16in belt, 11in deck, 30 knot speed, 12,000nm range at 16 knots, I had to go "BIG" (Very BIG). This page describes the original specifications. The "Never Were" catalog has the pictures. The specifications are extremely unworkable, but I was able to at least get a valid Springsharp design in 3.0b1 Beta that had not obvious flaws, other than the size and deep draft of 37ft:

Fujimoto "Dream Battleship", Japan Battleship laid down 1934 (Engine 1941)

Displacement:
 163,882 t light; 172,036 t standard; 182,175 t normal; 190,286 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (1,361.18 ft / 1,350.00 ft) x 185.00 ft x (37.00 / 38.37 ft)
 (414.89 m / 411.48 m) x 56.39 m  x (11.28 / 11.70 m)

Armament:
      12 - 20.00" / 508 mm 50.0 cal guns - 4,250.00lbs / 1,927.77kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1934 Model
   2 x Quad mounts on centreline, forward deck forward
  1 raised mount - superfiring
   1 x Quad mount on centreline, forward evenly spread
      16 - 6.10" / 155 mm 55.0 cal guns - 122.64lbs / 55.63kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1934 Model
   2 x Twin mounts on sides, forward deck forward
   6 x Twin mounts on sides, aft deck forward
  2 raised mounts - superfiring
      18 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Dual purpose guns in deck and hoist mounts , 1934 Model
   8 x Twin mounts on sides, aft deck forward
  4 raised mounts - superfiring
   1 x Twin mount on centreline, aft deck forward
  1 raised mount
 Weight of broadside 54,132 lbs / 54,132 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 16.0" / 406 mm 515.00 ft / 156.97 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 59 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 515.00 ft / 156.97 m 36.00 ft / 10.97 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 16.0" / 406 mm 10.0" / 254 mm  16.0" / 406 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 3rd: 2.00" / 51 mm 1.00" / 25 mm  2.00" / 51 mm

   - Armour deck: 11.00" / 279 mm, Conning tower: 16.00" / 406 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 314,447 shp / 234,578 Kw = 30.00 kts
 Range 12,000nm at 16.00 kts
 Bunker at max displacement = 18,249 tons

Complement:
 4,408 - 5,731

Cost:
 £61.417 million / $245.668 million

Distribution of weights at normal displacement:
 Armament: 9,166 tons, 5.0 %
 Armour: 63,388 tons, 34.8 %
    - Belts: 6,471 tons, 3.6 %
    - Torpedo bulkhead: 5,488 tons, 3.0 %
    - Armament: 8,168 tons, 4.5 %
    - Armour Deck: 42,154 tons, 23.1 %
    - Conning Tower: 1,108 tons, 0.6 %
 Machinery: 8,310 tons, 4.6 %
 Hull, fittings & equipment: 84,304 tons, 46.3 %
 Fuel, ammunition & stores: 18,293 tons, 10.0 %
 Miscellaneous weights: 1,200 tons, 0.7 %
    - Hull below water: 1,200 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   501,260 lbs / 227,368 Kg = 125.3 x 20.0 " / 508 mm shells or 155.5 torpedoes
 Stability (Unstable if below 1.00): 1.44
 Metacentric height 23.7 ft / 7.2 m
 Roll period: 15.9 seconds
 Steadiness - As gun platform (Average = 50 %): 60 %
   - Recoil effect (Restricted arc if above 1.00): 0.26
 Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
 Hull has rise aft of midbreak, low quarterdeck ,
   a normal bow and small transom stern
 Block coefficient (normal/deep): 0.690 / 0.695
 Length to Beam Ratio: 7.30 : 1
 'Natural speed' for length: 42.17 kts
 Power going to wave formation at top speed: 39 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 16.00 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 %,  39.00 ft / 11.89 m,  30.00 ft / 9.14 m
    - Forward deck: 17.00 %,  30.00 ft / 9.14 m,  28.00 ft / 8.53 m
    - Aft deck: 46.00 %,  34.00 ft / 10.36 m,  34.00 ft / 10.36 m
    - Quarter deck: 17.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Average freeboard:  31.20 ft / 9.51 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 50.4 %
  - Above water (accommodation/working, high = better): 292.3 %
 Waterplane Area: 207,143 Square feet or 19,244 Square metres
 Displacement factor (Displacement / loading): 135 %
 Structure weight / hull surface area: 344 lbs/sq ft or 1,681 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.23
  - Longitudinal: 0.93
  - 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