A ship in the next series of design studies: Ger/BB/1939 12in

The next series of design studies also had a similar "template". They all would have separate secondary and AA guns, rather than DP guns. There was the usual tower mast, a single funnel, and triple turrets for the main armament. This is a design study from the low end of the range. This ship was a 12-inch gunned battleship of 30,298 tons with a 12in armor basis. The speed was a modest 27 knots. This was fast enough to fit the fast battleship formula, but low enough to have a modest impact on the design at this date. The secondary armament is 12-6in QF guns and the AA armament is 12-4in AA, 42-37mm AA, and 28-20mm AA guns. This is the Springsharp report:

Ger/BB/1939 12in, Germany Battleship laid down 1939

Displacement:
 26,876 t light; 27,976 t standard; 30,298 t normal; 32,155 t full load

Dimensions: Length overall / water x beam x draught
 719.10 ft / 715.00 ft x 98.00 ft x 28.00 ft (normal load)
 219.18 m / 217.93 m x 29.87 m  x 8.53 m

Armament:
      9 - 12.00" / 305 mm guns (3x3 guns), 864.00lbs / 391.90kg shells, 1939 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      12 - 6.00" / 152 mm guns (6x2 guns), 108.00lbs / 48.99kg shells, 1939 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships
      12 - 4.00" / 102 mm guns (6x2 guns), 32.00lbs / 14.51kg shells, 1939 Model
   Anti-aircraft guns in turrets (on barbettes)
   on side, evenly spread, all raised mounts
      42 - 1.46" / 37.0 mm guns (21x2 guns), 1.55lbs / 0.70kg shells, 1939 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread, 16 raised mounts
      28 - 0.79" / 20.0 mm guns (14x2 guns), 0.24lbs / 0.11kg shells, 1939 Model
   Breech loading guns in deck mounts 
   on side, evenly spread, 8 raised mounts
 Weight of broadside 9,528 lbs / 4,322 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 470.00 ft / 143.26 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 101 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 470.00 ft / 143.26 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  12.0" / 305 mm
 2nd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm
 3rd: 1.00" / 25 mm 1.00" / 25 mm  1.00" / 25 mm
 4th: 1.00" / 25 mm       -         -
 5th: 1.00" / 25 mm       -         -

   - Armour deck: 4.00" / 102 mm, Conning tower: 13.00" / 330 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 84,348 shp / 62,923 Kw = 27.00 kts
 Range 6,500nm at 18.00 kts
 Bunker at max displacement = 4,179 tons

Complement:
 1,147 - 1,492

Cost:
 £13.152 million / $52.609 million

Distribution of weights at normal displacement:
 Armament: 1,191 tons, 3.9 %
 Armour: 11,689 tons, 38.6 %
    - Belts: 4,111 tons, 13.6 %
    - Torpedo bulkhead: 939 tons, 3.1 %
    - Armament: 2,780 tons, 9.2 %
    - Armour Deck: 3,587 tons, 11.8 %
    - Conning Tower: 272 tons, 0.9 %
 Machinery: 2,282 tons, 7.5 %
 Hull, fittings & equipment: 11,714 tons, 38.7 %
 Fuel, ammunition & stores: 3,422 tons, 11.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   57,860 lbs / 26,245 Kg = 67.0 x 12.0 " / 305 mm shells or 10.8 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 6.2 ft / 1.9 m
 Roll period: 16.6 seconds
 Steadiness - As gun platform (Average = 50 %): 68 %
   - Recoil effect (Restricted arc if above 1.00): 0.47
 Seaboat quality  (Average = 1.00): 1.36

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.540
 Length to Beam Ratio: 7.30 : 1
 'Natural speed' for length: 26.74 kts
 Power going to wave formation at top speed: 48 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 4.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  30.00 ft / 9.14 m
    - Forecastle (20 %): 21.00 ft / 6.40 m
    - Mid (50 %):  21.00 ft / 6.40 m
    - Quarterdeck (15 %): 21.00 ft / 6.40 m
    - Stern:  21.00 ft / 6.40 m
    - Average freeboard: 21.72 ft / 6.62 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 68.7 %
  - Above water (accommodation/working, high = better): 169.0 %
 Waterplane Area: 48,468 Square feet or 4,503 Square metres
 Displacement factor (Displacement / loading): 118 %
 Structure weight / hull surface area: 173 lbs/sq ft or 846 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.31
  - 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