The Ger/CBL/1915 design

Back when I conceived of the Ger/CBL/1915 design, I did not know about the 75,000 SHP limitation on each propellor shaft. Above that loading, the shaft will fail. Frank Fox had told me about that issue when I was doing more active design work on warship designs. I was able to achieve a 40 knot speed with the lightest machinery and with six shafts. The whole idea of this ship is to kill lesser cruisers by running in close and blasting with the 2-12in guns and having the 6in guns in case one of the ships actually has a fight.

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

Displacement:
 21,413 t light; 22,061 t standard; 23,131 t normal; 23,988 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (806.67 ft / 800.00 ft) x 80.00 ft x (23.00 / 23.67 ft)
 (245.87 m / 243.84 m) x 24.38 m  x (7.01 / 7.22 m)

Armament:
      2 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mount, 1915 Model
   1 x Twin mount on centreline, forward deck forward
      12 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1915 Model
   12 x Single mounts on sides, forward deck aft
      Weight of broadside 2,900 lbs / 1,315 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 470.00 ft / 143.26 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 90 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 470.00 ft / 143.26 m 23.00 ft / 7.01 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 2nd: 3.00" / 76 mm 1.00" / 25 mm  3.00" / 76 mm

   - Armoured deck - multiple decks: 2.00" / 51 mm For and Aft decks
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 6.00" / 152 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 319,174 shp / 238,104 Kw = 40.00 kts
 Range 4,800nm at 16.00 kts
 Bunker at max displacement = 1,928 tons

Complement:
 937 - 1,219

Cost:
 £3.061 million / $12.245 million

Distribution of weights at normal displacement:
 Armament: 657 tons, 2.8 %
 Armour: 3,537 tons, 15.3 %
    - Belts: 941 tons, 4.1 %
    - Torpedo bulkhead: 400 tons, 1.7 %
    - Armament: 427 tons, 1.8 %
    - Armour Deck: 1,664 tons, 7.2 %
    - Conning Tower: 105 tons, 0.5 %
 Machinery: 7,636 tons, 33.0 %
 Hull, fittings & equipment: 9,583 tons, 41.4 %
 Fuel, ammunition & stores: 1,719 tons, 7.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   23,402 lbs / 10,615 Kg = 27.1 x 12.0 " / 305 mm shells or 2.5 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 5.0 ft / 1.5 m
 Roll period: 15.0 seconds
 Steadiness - As gun platform (Average = 50 %): 56 %
   - Recoil effect (Restricted arc if above 1.00): 0.31
 Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.550 / 0.554
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 61 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 7.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 35.00 %,  38.00 ft / 11.58 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  32.00 ft / 9.75 m
    - Aft deck: 20.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Quarter deck: 15.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Average freeboard:  30.04 ft / 9.16 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 157.8 %
  - Above water (accommodation/working, high = better): 261.5 %
 Waterplane Area: 44,665 Square feet or 4,150 Square metres
 Displacement factor (Displacement / loading): 107 %
 Structure weight / hull surface area: 134 lbs/sq ft or 655 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.69
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent