The compact version of a Ger/BB/1915

This is the compact version of the Ger/BB/1915 design study. It is not an extreme design, however. This is 755ft x 110ft x 32ft, with a nominal standard displacement of 45,000 tons. The armament is 9-16.5in and 10-6in QF guns. I was not able to put as much armor into the design as I had originally anticipated. I allowed for 120,000 SHP, but underestimated what speed could be achieved with that. The planned SHP/ton was 30. This is the Springsharp report:

Ger/BB/1915 Compact Version, Germany Battleship laid down 1915 (Engine 1927)

Displacement:
 42,259 t light; 44,143 t standard; 46,500 t normal; 48,385 t full load

Dimensions: Length overall / water x beam x draught
 756.57 ft / 755.00 ft x 110.00 ft x 32.00 ft (normal load)
 230.60 m / 230.12 m x 33.53 m  x 9.75 m

Armament:
      9 - 16.50" / 419 mm guns (3x3 guns), 2,246.06lbs / 1,018.80kg shells, 1915 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      10 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships, 2 raised mounts - superfiring
 Weight of broadside 21,295 lbs / 9,659 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 16.5" / 419 mm 410.00 ft / 124.97 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 84 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  3.00" / 76 mm 410.00 ft / 124.97 m 30.00 ft / 9.14 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 16.5" / 419 mm 9.00" / 229 mm  16.5" / 419 mm
 2nd: 4.00" / 102 mm       -         -

   - Armour deck: 5.00" / 127 mm, Conning tower: 16.00" / 406 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 119,805 shp / 89,375 Kw = 27.50 kts
 Range 6,700nm at 15.00 kts
 Bunker at max displacement = 4,242 tons

Complement:
 1,583 - 2,058

Cost:
 £6.174 million / $24.695 million

Distribution of weights at normal displacement:
 Armament: 2,662 tons, 5.7 %
 Armour: 16,866 tons, 36.3 %
    - Belts: 4,897 tons, 10.5 %
    - Torpedo bulkhead: 1,365 tons, 2.9 %
    - Armament: 4,475 tons, 9.6 %
    - Armour Deck: 5,684 tons, 12.2 %
    - Conning Tower: 446 tons, 1.0 %
 Machinery: 3,782 tons, 8.1 %
 Hull, fittings & equipment: 18,949 tons, 40.8 %
 Fuel, ammunition & stores: 4,241 tons, 9.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   68,155 lbs / 30,915 Kg = 30.3 x 16.5 " / 419 mm shells or 10.8 torpedoes
 Stability (Unstable if below 1.00): 1.07
 Metacentric height 6.6 ft / 2.0 m
 Roll period: 18.0 seconds
 Steadiness - As gun platform (Average = 50 %): 64 %
   - Recoil effect (Restricted arc if above 1.00): 0.80
 Seaboat quality  (Average = 1.00): 1.28

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.612
 Length to Beam Ratio: 6.86 : 1
 'Natural speed' for length: 27.48 kts
 Power going to wave formation at top speed: 51 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 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 %): 28.00 ft / 8.53 m
    - Mid (64 %):  28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
    - Quarterdeck (15 %): 20.00 ft / 6.10 m
    - Stern:  20.00 ft / 6.10 m
    - Average freeboard: 25.28 ft / 7.71 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 84.6 %
  - Above water (accommodation/working, high = better): 187.9 %
 Waterplane Area: 61,448 Square feet or 5,709 Square metres
 Displacement factor (Displacement / loading): 102 %
 Structure weight / hull surface area: 222 lbs/sq ft or 1,082 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.52
  - 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