My very latest attempt at designing Colonel Cuniberti's Ideal Battleship

The main deviations for my Springsharp design for Colonel Cuniberti's Ideal Battleship for the British navy are excessive beam and displacement. The armor is also lighter than he had envisioned. The main obstacle to doing what he wanted is stability, due to the armament on a relatively small ship, as well as the machinery required to make 24 knots. I hope to make a paper model of the ship to aid my perspective efforts. My first attempts will be for the Ideal Battleship and for the Ger/CS/1905. This is the latest Springsharp report for the Ideal Battleship. I suspect that part of the problem is specifying the gun mounts and heights. The defaults in Springsharp seem to be wrong.

Colonel Cunibert's Ideal Battleship, Great Britain Battleship laid down 1903 (Engine 1912)

Displacement:
 19,187 t light; 20,122 t standard; 23,186 t normal; 25,637 t full load

Dimensions: Length overall / water x beam x draught
 521.50 ft / 521.50 ft x 91.00 ft x 30.00 ft (normal load)
 158.95 m / 158.95 m x 27.74 m  x 9.14 m

Armament:
      12 - 12.00" / 305 mm guns (8 mounts), 864.00lbs / 391.90kg shells, 1903 Model
   Breech loading guns in turrets (on barbettes)
   on side ends, evenly spread, all raised mounts - superfiring
   Main guns limited to end-on fire
      12 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1903 Model
   Quick firing guns in casemate mounts 
   on side, all amidships
   12 guns in hull casemates - Limited use in heavy seas
      6 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1903 Model
   Quick firing guns in deck mounts 
   on side, all amidships, all raised mounts - superfiring
 Weight of broadside 10,549 lbs / 4,785 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
 Ends: 4.00" / 102 mm 141.50 ft / 43.13 m 16.00 ft / 4.88 m
 Upper: 6.00" / 152 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
   Main Belt covers 112 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 380.00 ft / 115.82 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 7.00" / 178 mm 5.00" / 127 mm  7.00" / 178 mm
 2nd: 2.00" / 51 mm       -         -

   - Armour deck: 2.00" / 51 mm, Conning tower: 7.00" / 178 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 52,127 shp / 38,887 Kw = 24.00 kts
 Range 9,600nm at 15.00 kts
 Bunker at max displacement = 5,515 tons

Complement:
 939 - 1,221

Cost:
 £2.070 million / $8.281 million

Distribution of weights at normal displacement:
 Armament: 1,319 tons, 5.7 %
 Armour: 6,792 tons, 29.3 %
    - Belts: 2,163 tons, 9.3 %
    - Torpedo bulkhead: 759 tons, 3.3 %
    - Armament: 2,498 tons, 10.8 %
    - Armour Deck: 1,249 tons, 5.4 %
    - Conning Tower: 123 tons, 0.5 %
 Machinery: 2,078 tons, 9.0 %
 Hull, fittings & equipment: 8,997 tons, 38.8 %
 Fuel, ammunition & stores: 3,999 tons, 17.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   25,730 lbs / 11,671 Kg = 29.8 x 12.0 " / 305 mm shells or 4.0 torpedoes
 Stability (Unstable if below 1.00): 0.95
 Metacentric height 3.9 ft / 1.2 m
 Roll period: 19.4 seconds
 Steadiness - As gun platform (Average = 50 %): 60 %
   - Recoil effect (Restricted arc if above 1.00): 1.06
 Seaboat quality  (Average = 1.00): 1.19

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.570
 Length to Beam Ratio: 5.73 : 1
 'Natural speed' for length: 22.84 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  28.00 ft / 8.53 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (68 %):  26.00 ft / 7.92 m (17.00 ft / 5.18 m aft of break)
    - Quarterdeck (15 %): 17.00 ft / 5.18 m
    - Stern:  17.00 ft / 5.18 m
    - Average freeboard: 23.28 ft / 7.10 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 91.8 %
  - Above water (accommodation/working, high = better): 161.9 %
 Waterplane Area: 33,747 Square feet or 3,135 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 180 lbs/sq ft or 881 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.91
  - Longitudinal: 2.27
  - Overall: 1.00
 Caution: Poor stability - excessive risk of capsizing
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent