The original concept for the Ger/CB/1905 battlecruiser in Springsharp 3.0b2 Beta

Springsharp 3.0b2 Beta is a great improvement, even over the last beta version. The next design in the "Blue Book" is the original concept for the Ger/CB/1905 design. This is a light battlecruiser with 4-12in/45 and 12-4in QF guns. The armour basis is 4in with 3in+1in decks. The torpedo bulkhead is 2in. The turret faces are 9in and the barbettes, at their thickest point, are 8in. The speed is 31 knots and I have used a range of 7.500nm at 18 knots. This is a photograph of the one ship built, the Blücher:

This is the Springsharp report:

Ger/CB/1905 Original Concept, Germany Battlecruiser laid down 1905 (Engine 1912)

Displacement:
 18,475 t light; 19,136 t standard; 22,760 t normal; 25,660 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (703.00 ft / 700.00 ft) x 80.00 ft x (24.40 / 26.92 ft)
 (214.27 m / 213.36 m) x 24.38 m  x (7.44 / 8.20 m)

Armament:
      4 - 12.00" / 305 mm 45.0 cal guns - 871.00lbs / 395.08kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1905 Model
   2 x Twin mounts on centreline ends, evenly spread
      12 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1905 Model
   12 x Single mounts on sides amidships
      Weight of broadside 3,871 lbs / 1,756 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 4.00" / 102 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
   Main Belt covers 84 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 380.00 ft / 115.82 m 24.40 ft / 7.44 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 4.00" / 102 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Armoured deck - multiple decks: 4.00" / 102 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 9.00" / 229 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 122,269 shp / 91,213 Kw = 31.00 kts
 Range 7,500nm at 18.00 kts
 Bunker at max displacement = 6,523 tons

Complement:
 926 - 1,204

Cost:
 £1.673 million / $6.693 million

Distribution of weights at normal displacement:
 Armament: 689 tons, 3.0 %
 Armour: 5,400 tons, 23.7 %
    - Belts: 1,049 tons, 4.6 %
    - Torpedo bulkhead: 686 tons, 3.0 %
    - Armament: 699 tons, 3.1 %
    - Armour Deck: 2,810 tons, 12.3 %
    - Conning Tower: 156 tons, 0.7 %
 Machinery: 4,875 tons, 21.4 %
 Hull, fittings & equipment: 7,511 tons, 33.0 %
 Fuel, ammunition & stores: 4,286 tons, 18.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   33,961 lbs / 15,405 Kg = 39.3 x 12.0 " / 305 mm shells or 4.4 torpedoes
 Stability (Unstable if below 1.00): 1.35
 Metacentric height 6.1 ft / 1.8 m
 Roll period: 13.6 seconds
 Steadiness - As gun platform (Average = 50 %): 63 %
   - Recoil effect (Restricted arc if above 1.00): 0.29
 Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.583 / 0.596
 Length to Beam Ratio: 8.75 : 1
 'Natural speed' for length: 26.46 kts
 Power going to wave formation at top speed: 54 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 30.00 %,  29.00 ft / 8.84 m,  26.00 ft / 7.92 m
    - Forward deck: 33.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Aft deck: 22.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  23.40 ft / 7.13 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 111.6 %
  - Above water (accommodation/working, high = better): 189.1 %
 Waterplane Area: 40,311 Square feet or 3,745 Square metres
 Displacement factor (Displacement / loading): 124 %
 Structure weight / hull surface area: 129 lbs/sq ft or 632 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.24
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily