A "better" version of the Ger/CBL/1915 Mod.A design

I wanted to have full coverage of armour over the machinery spaces and to have a 16ft wide belt. I was able to do that and still make 40 knots by using very high power output machinery. The machinery will produce 41.85 SHP/ton of machinery weight. While that is large, realize that HMS Swift, designed in 1905, could produce 50,000 SHP at about 60 SHP/ton. This is the revised Springsharp report:

Ger/CBL/1915 Mod.A, Germany Light Battlecruiser laid down 1915 (Engine 1950)

Displacement:
 20,566 t light; 21,141 t standard; 22,000 t normal; 22,687 t full load

Dimensions: Length overall / water x beam x draught
 801.78 ft / 800.00 ft x 80.00 ft x 25.00 ft (normal load)
 244.38 m / 243.84 m x 24.38 m  x 7.62 m

Armament:
      2 - 12.00" / 305 mm guns (1x2 guns), 864.00lbs / 391.90kg shells, 1915 Model
   Breech loading guns in a turret (on a barbette)
   on centreline forward
      12 - 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
 Weight of broadside 3,024 lbs / 1,372 kg
 Shells per gun, main battery: 75

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 620.00 ft / 188.98 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 119 % of normal length

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 4.00" / 102 mm  5.00" / 127 mm
 2nd: 2.00" / 51 mm       -         -

   - Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 297,389 shp / 221,853 Kw = 40.00 kts
 Range 4,500nm at 15.00 kts
 Bunker at max displacement = 1,546 tons

Complement:
 903 - 1,174

Cost:
 £2.958 million / $11.831 million

Distribution of weights at normal displacement:
 Armament: 378 tons, 1.7 %
 Armour: 3,620 tons, 16.5 %
    - Belts: 1,607 tons, 7.3 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 360 tons, 1.6 %
    - Armour Deck: 1,551 tons, 7.1 %
    - Conning Tower: 101 tons, 0.5 %
 Machinery: 7,115 tons, 32.3 %
 Hull, fittings & equipment: 9,454 tons, 43.0 %
 Fuel, ammunition & stores: 1,434 tons, 6.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   22,462 lbs / 10,189 Kg = 26.0 x 12.0 " / 305 mm shells or 1.9 torpedoes
 Stability (Unstable if below 1.00): 1.25
 Metacentric height 5.4 ft / 1.6 m
 Roll period: 14.5 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.31
 Seaboat quality  (Average = 1.00): 1.11

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.481
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 60 %
 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:  34.00 ft / 10.36 m
    - Forecastle (20 %): 30.00 ft / 9.14 m
    - Mid (69 %):  30.00 ft / 9.14 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: 27.84 ft / 8.49 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 117.7 %
  - Above water (accommodation/working, high = better): 247.9 %
 Waterplane Area: 41,929 Square feet or 3,895 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 138 lbs/sq ft or 675 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.57
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent