First of a series of design studies from 1999 (Revised)

In early February 1999, I did a series of design studies for German-looking battleships and battlecruisers. They were testing the dynamic range of the "design space". The first one is a moderate sized ship rather Scharnhorst-like, except smaller, but with 12in guns. I actually am somewhat unsure of what I had intended for the nationality, but the look is very German. I realized that the secondary armament was wrong, so this is a slightly revised version. My original specifications were:

Displacement=30,015 tons

9-12in/50

Length= 741ft
Beam=    98ft 
Draft=   27ft

Cp= 0.57
Cm= 0.94

Speed=29 knots
Belt= 11in
Deck= 4in + 2in

Springsharp doesn't model multiple armored decks, so I have generally opted to omit one. This is the Springsharp report for what I entered for this specification:

Ger/CB/1937, Germany Battlecruiser laid down 1937

Displacement:
 27,233 t light; 28,259 t standard; 30,015 t normal; 31,420 t full load

Dimensions: Length overall / water x beam x draught
 744.36 ft / 741.00 ft x 98.00 ft x 27.00 ft (normal load)
 226.88 m / 225.86 m x 29.87 m  x 8.23 m

Armament:
      9 - 12.00" / 305 mm guns (3x3 guns), 864.00lbs / 391.90kg shells, 1937 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1937 Model
   Dual purpose guns in turrets (on barbettes)
   on side, all amidships
 Weight of broadside 9,276 lbs / 4,208 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 11.0" / 279 mm 490.00 ft / 149.35 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 102 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 490.00 ft / 149.35 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 11.0" / 279 mm 7.00" / 178 mm  11.0" / 279 mm
 2nd: 5.00" / 127 mm 5.00" / 127 mm  5.00" / 127 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 11.00" / 279 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 109,045 shp / 81,348 Kw = 29.00 kts
 Range 7,250nm at 15.00 kts
 Bunker at max displacement = 3,161 tons

Complement:
 1,139 - 1,482

Cost:
 £12.820 million / $51.278 million

Distribution of weights at normal displacement:
 Armament: 1,160 tons, 3.9 %
 Armour: 11,438 tons, 38.1 %
    - Belts: 3,909 tons, 13.0 %
    - Torpedo bulkhead: 943 tons, 3.1 %
    - Armament: 2,657 tons, 8.9 %
    - Armour Deck: 3,701 tons, 12.3 %
    - Conning Tower: 229 tons, 0.8 %
 Machinery: 3,022 tons, 10.1 %
 Hull, fittings & equipment: 11,613 tons, 38.7 %
 Fuel, ammunition & stores: 2,782 tons, 9.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   50,988 lbs / 23,128 Kg = 59.0 x 12.0 " / 305 mm shells or 8.9 torpedoes
 Stability (Unstable if below 1.00): 1.18
 Metacentric height 6.6 ft / 2.0 m
 Roll period: 16.1 seconds
 Steadiness - As gun platform (Average = 50 %): 57 %
   - Recoil effect (Restricted arc if above 1.00): 0.38
 Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.536
 Length to Beam Ratio: 7.56 : 1
 'Natural speed' for length: 27.22 kts
 Power going to wave formation at top speed: 50 %
 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:  26.00 ft / 7.92 m
    - Forecastle (20 %): 20.00 ft / 6.10 m
    - Mid (50 %):  20.00 ft / 6.10 m
    - Quarterdeck (15 %): 20.00 ft / 6.10 m
    - Stern:  20.00 ft / 6.10 m
    - Average freeboard: 20.48 ft / 6.24 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 78.0 %
  - Above water (accommodation/working, high = better): 167.3 %
 Waterplane Area: 50,010 Square feet or 4,646 Square metres
 Displacement factor (Displacement / loading): 112 %
 Structure weight / hull surface area: 170 lbs/sq ft or 829 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.10
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent