The original concept for the Ger/CS/1905 scouts

My original concept for the Ger/CS/1905 scouts was to be a ship of 2,200 tons, with dimensions 365ft x 37ft x 12ft, with a speed of 37 knots. I had optimistically hoped that about 45,000 SHP would be sufficient to make that speed. The armament was 6-4in QF guns in the lozenge arrangement and there were 2-18in TT. There was no armour, except guns shields and protection to the hoists. The cost was to be £198,000. To make the design work in Springsharp, the machinery had to be very light and the displacement was reduced considerably below the 2,200 tons. Somewhat more than 45,000 SHP was required just to reach 34 knots, much less 37 knots. This is the Springsharp report:

Ger/CS/1905 Original Concept, Germany Scout Cruiser laid down 1905 (Engine 1950)

Displacement:
 1,624 t light; 1,683 t standard; 1,898 t normal; 2,071 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (365.00 ft / 365.00 ft) x 37.00 ft x (12.00 / 12.72 ft)
 (111.25 m / 111.25 m) x 11.28 m  x (3.66 / 3.88 m)

Armament:
      6 - 4.00" / 102 mm 50.0 cal guns - 32.00lbs / 14.51kg shells, 180 per gun
   Quick firing guns in deck and hoist mounts, 1905 Model
   2 x Single mounts on centreline ends, evenly spread
   4 x Single mounts on sides, evenly spread
      Weight of broadside 192 lbs / 87 kg
      2 - 18.0" / 457 mm, 20.00 ft / 6.10 m torpedoes - 0.865 t each, 1.729 t total
 In 2 sets of deck mounted centre rotating tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 46,400 shp / 34,614 Kw = 34.00 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 389 tons

Complement:
 143 - 186

Cost:
 £0.209 million / $0.838 million

Distribution of weights at normal displacement:
 Armament: 64 tons, 3.4 %
    - Guns: 62 tons, 3.3 %
    - Torpedoes: 2 tons, 0.1 %
 Armour: 80 tons, 4.2 %
    - Armament: 80 tons, 4.2 %
 Machinery: 934 tons, 49.2 %
 Hull, fittings & equipment: 546 tons, 28.7 %
 Fuel, ammunition & stores: 275 tons, 14.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   597 lbs / 271 Kg = 18.6 x 4.0 " / 102 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.27
 Metacentric height 1.7 ft / 0.5 m
 Roll period: 11.8 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.24
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.410 / 0.422
 Length to Beam Ratio: 9.86 : 1
 'Natural speed' for length: 19.10 kts
 Power going to wave formation at top speed: 67 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 18.00 %,  23.00 ft / 7.01 m,  22.00 ft / 6.71 m
    - Forward deck: 15.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 52.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Quarter deck: 15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Average freeboard:  16.71 ft / 5.09 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 169.5 %
  - Above water (accommodation/working, high = better): 144.7 %
 Waterplane Area: 8,363 Square feet or 777 Square metres
 Displacement factor (Displacement / loading): 76 %
 Structure weight / hull surface area: 34 lbs/sq ft or 168 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.46
  - Longitudinal: 1.98
  - Overall: 0.54
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent