The GB/CB/1907 design (Kent class)

My friend Cliff's extension of the GB/CB/1905 design for 1907 was intended to have 12in/50 caliber guns, although there doesn't seem to be any way in Springsharp to provide for that. For better or worse, I went with a machinery weight basis of 27.28 SHP/ton. The resulting ship is superior to the original design. The main thing that could be improved, but wasn't, would be to have more 12in guns. I didn't want to violate the spirit of Cliff's itent, so I left the design with 4-12in guns. The primary improvement was vastly superior protection. This is the resulting Springsharp report:

GB/CB/1907 (Kent class), Great Britain Battle Cruiser laid down 1907 (Engine 1917)

Displacement:
 26,676 t light; 27,541 t standard; 30,522 t normal; 32,906 t full load

Dimensions: Length overall / water x beam x draught
 770.00 ft / 770.00 ft x 92.00 ft x 29.00 ft (normal load)
 234.70 m / 234.70 m x 28.04 m  x 8.84 m

Armament:
      4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1907 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, all raised mounts
      9 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
   Quick firing guns in deck mounts with hoists
   on side ends, majority aft, all raised mounts - superfiring
 Weight of broadside 4,428 lbs / 2,009 kg
 Shells per gun, main battery: 100

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 7.00" / 178 mm 535.00 ft / 163.07 m 18.00 ft / 5.49 m
 Ends: Unarmoured
   Main Belt covers 107 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 545.00 ft / 166.12 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 8.00" / 203 mm  10.0" / 254 mm
 2nd: 2.00" / 51 mm       -         -

   - Armour deck: 3.50" / 89 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 177,042 shp / 132,073 Kw = 33.00 kts
 Range 9,600nm at 15.00 kts
 Bunker at max displacement = 5,365 tons

Complement:
 1,153 - 1,500

Cost:
 £2.307 million / $9.229 million

Distribution of weights at normal displacement:
 Armament: 554 tons, 1.8 %
 Armour: 8,466 tons, 27.7 %
    - Belts: 2,821 tons, 9.2 %
    - Torpedo bulkhead: 1,089 tons, 3.6 %
    - Armament: 1,275 tons, 4.2 %
    - Armour Deck: 3,113 tons, 10.2 %
    - Conning Tower: 168 tons, 0.6 %
 Machinery: 6,490 tons, 21.3 %
 Hull, fittings & equipment: 11,167 tons, 36.6 %
 Fuel, ammunition & stores: 3,846 tons, 12.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   39,409 lbs / 17,875 Kg = 45.6 x 12.0 " / 305 mm shells or 5.5 torpedoes
 Stability (Unstable if below 1.00): 1.17
 Metacentric height 5.9 ft / 1.8 m
 Roll period: 15.9 seconds
 Steadiness - As gun platform (Average = 50 %): 69 %
   - Recoil effect (Restricted arc if above 1.00): 0.32
 Seaboat quality  (Average = 1.00): 1.38

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.520
 Length to Beam Ratio: 8.37 : 1
 'Natural speed' for length: 27.75 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:  34.00 ft / 10.36 m
    - Forecastle (74 %): 31.00 ft / 9.45 m
    - Mid (74 %):  31.00 ft / 9.45 m (22.00 ft / 6.71 m aft of break)
    - Quarterdeck (15 %): 22.00 ft / 6.71 m
    - Stern:  22.00 ft / 6.71 m
    - Average freeboard: 29.55 ft / 9.01 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 106.3 %
  - Above water (accommodation/working, high = better): 174.7 %
 Waterplane Area: 48,074 Square feet or 4,466 Square metres
 Displacement factor (Displacement / loading): 118 %
 Structure weight / hull surface area: 149 lbs/sq ft or 725 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.49
  - 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