My Ger/CB/1912 design

I tried this design for a German battlecruiser to be laid down in 1912. This is a "modified" German design, as I use English measurements, rather than metric, as I think in English. This is a 27 knot ship with coal-fired boilers and 8-13.4in/45 BLR and 14-6in/45 QF guns. Unlike the Mackensen class, this is a flush-decked design. I very nearly had this correct as entered, as I only had to tweak it to have an acceptable Springsharp design:

Ger/CB/1912, Germany Battlecruiser laid down 1912

Displacement:
 27,498 t light; 28,747 t standard; 31,804 t normal; 34,249 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (742.00 ft / 740.00 ft) x 95.00 ft x (29.00 / 30.75 ft)
 (226.16 m / 225.55 m) x 28.96 m  x (8.84 / 9.37 m)

Armament:
      8 - 13.40" / 340 mm 45.0 cal guns - 1,215.00lbs / 551.11kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1912 Model
   4 x Single mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      14 - 6.00" / 152 mm 45.0 cal guns - 108.00lbs / 48.99kg shells, 150 per gun
   Breech loading guns in casemate mounts , 1912 Model
   14 x Single mounts on sides, forward deck aft
 Weight of broadside 11,232 lbs / 11,232 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 510.00 ft / 155.45 m 8.00 ft / 2.44 m
 Ends: 5.00" / 127 mm 230.00 ft / 70.10 m 12.00 ft / 3.66 m
 Upper: 9.00" / 229 mm 510.00 ft / 155.45 m 8.00 ft / 2.44 m
   Main Belt covers 106 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 510.00 ft / 155.45 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 8.00" / 203 mm  12.0" / 305 mm
 2nd: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Coal and oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 85,401 shp / 63,709 Kw = 27.00 kts
 Range 5,600nm at 15.00 kts
 Bunker at max displacement = 5,503 tons (100% coal)

Complement:
 1,190 - 1,548

Cost:
 £2.464 million / $9.857 million

Distribution of weights at normal displacement:
 Armament: 2,276 tons, 7.2 %
 Armour: 10,773 tons, 33.9 %
    - Belts: 4,130 tons, 13.0 %
    - Torpedo bulkhead: 1,094 tons, 3.4 %
    - Armament: 2,577 tons, 8.1 %
    - Armour Deck: 2,713 tons, 8.5 %
    - Conning Tower: 260 tons, 0.8 %
 Machinery: 3,746 tons, 11.8 %
 Hull, fittings & equipment: 11,816 tons, 37.2 %
 Fuel, ammunition & stores: 4,305 tons, 13.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   49,156 lbs / 22,297 Kg = 40.9 x 13.4 " / 340 mm shells or 8.0 torpedoes
 Stability (Unstable if below 1.00): 1.17
 Metacentric height 6.2 ft / 1.9 m
 Roll period: 16.0 seconds
 Steadiness - As gun platform (Average = 50 %): 67 %
   - Recoil effect (Restricted arc if above 1.00): 0.54
 Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.546 / 0.555
 Length to Beam Ratio: 7.79 : 1
 'Natural speed' for length: 27.20 kts
 Power going to wave formation at top speed: 46 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 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 %,  29.00 ft / 8.84 m,  23.00 ft / 7.01 m
    - Forward deck: 30.00 %,  23.00 ft / 7.01 m,  21.00 ft / 6.40 m
    - Aft deck: 35.00 %,  21.00 ft / 6.40 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:  21.21 ft / 6.46 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 84.5 %
  - Above water (accommodation/working, high = better): 161.6 %
 Waterplane Area: 48,878 Square feet or 4,541 Square metres
 Displacement factor (Displacement / loading): 115 %
 Structure weight / hull surface area: 171 lbs/sq ft or 833 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.15
  - 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