A 1915 German scout cruiser design: Ger/CS/1915

This is based on a pencil drawing with minimal specifications from about 1971 or 1972. This is a small, fast scout cruiser in the spirit of the Ger/CS/1905 and Ger/CS/1909 designs. This one is modest in its speed (34 knots), so that the other characteristics (seakeeping and hull strength) will benefit. The dimensions are 415ft x 42ft x 12ft. The displacement is 2,450 tons with a prismatic coefficient of 0.6 and a midship coefficient of 0.85. The armament is 4-6in QF guns and 4-21in TT. The ship has a raised forecastle and two stacks with a 6in gun between them. This is the Springsharp report:

Ger/CS/1915, Germany Scout Cruiser laid down 1915 (Engine 1927)

Displacement:
 2,125 t light; 2,207 t standard; 2,450 t normal; 2,644 t full load

Dimensions: Length overall / water x beam x draught
 416.84 ft / 415.00 ft x 42.00 ft x 12.00 ft (normal load)
 127.05 m / 126.49 m x 12.80 m  x 3.66 m

Armament:
      4 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1915 Model
   Quick firing guns in deck mounts with hoists
   on centreline, evenly spread
   Aft Main mounts separated by engine room
 Weight of broadside 400 lbs / 181 kg
 Shells per gun, main battery: 150
 4 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 50,789 shp / 37,888 Kw = 34.00 kts
 Range 4,200nm at 15.00 kts
 Bunker at max displacement = 437 tons

Complement:
 173 - 226

Cost:
 £0.441 million / $1.764 million

Distribution of weights at normal displacement:
 Armament: 54 tons, 2.2 %
 Machinery: 1,310 tons, 53.5 %
 Hull, fittings & equipment: 760 tons, 31.0 %
 Fuel, ammunition & stores: 325 tons, 13.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   699 lbs / 317 Kg = 6.5 x 6.0 " / 152 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.54
 Metacentric height 2.8 ft / 0.9 m
 Roll period: 10.5 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.26
 Seaboat quality  (Average = 1.00): 1.09

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.410
 Length to Beam Ratio: 9.88 : 1
 'Natural speed' for length: 20.37 kts
 Power going to wave formation at top speed: 64 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 2.00 degrees
 Stern overhang: 1.00 ft / 0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  24.00 ft / 7.32 m
    - Forecastle (20 %): 22.00 ft / 6.71 m
    - Mid (32 %):  22.00 ft / 6.71 m (14.00 ft / 4.27 m aft of break)
    - Quarterdeck (15 %): 14.00 ft / 4.27 m
    - Stern:  14.00 ft / 4.27 m
    - Average freeboard: 16.72 ft / 5.10 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 189.3 %
  - Above water (accommodation/working, high = better): 154.8 %
 Waterplane Area: 10,794 Square feet or 1,003 Square metres
 Displacement factor (Displacement / loading): 67 %
 Structure weight / hull surface area: 40 lbs/sq ft or 194 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.50
  - Longitudinal: 1.45
  - Overall: 0.56
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent