The Ger/CS/1905 Mod.A

From the Red book, the next page is the Ger/CS/1905 Mod.A sketch design. This was a remodelled Ger/CS/1905 scout cruiser with 3-6in QF guns and 4-21in TT. By using lightweight machinery, the ship can keep within the dimensions and displacement and still achieve 34 knots. The basic concept was trying to follow the much later Super Swift design parameters. This is the Springsharp report:

Ger/CS/1905 Mod.A, Enter country Enter ship type laid down 1905 (Engine 1941)

Displacement:
 2,446 t light; 2,522 t standard; 2,730 t normal; 2,896 t full load

Dimensions: Length overall / water x beam x draught
 371.36 ft / 370.00 ft x 38.00 ft x 13.00 ft (normal load)
 113.19 m / 112.78 m x 11.58 m  x 3.96 m

Armament:
      3 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1905 Model
   Quick firing guns in deck mounts with hoists
   on centreline ends, majority forward
 Weight of broadside 324 lbs / 147 kg
 Shells per gun, main battery: 120
 4 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 2.00" / 51 mm 255.00 ft / 77.72 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 2.00" / 51 mm 150.00 ft / 45.72 m 8.00 ft / 2.44 m
   Main Belt covers 106 % of normal length
   Main belt does not fully cover magazines and engineering spaces

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

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 62,646 shp / 46,734 Kw = 34.00 kts
 Range 3,750nm at 15.00 kts
 Bunker at max displacement = 375 tons

Complement:
 188 - 245

Cost:
 £0.316 million / $1.263 million

Distribution of weights at normal displacement:
 Armament: 41 tons, 1.5 %
 Armour: 310 tons, 11.3 %
    - Belts: 278 tons, 10.2 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 32 tons, 1.2 %
    - Armour Deck: 0 tons, 0.0 %
    - Conning Tower: 0 tons, 0.0 %
 Machinery: 1,401 tons, 51.3 %
 Hull, fittings & equipment: 695 tons, 25.5 %
 Fuel, ammunition & stores: 284 tons, 10.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   719 lbs / 326 Kg = 6.7 x 6.0 " / 152 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.35
 Metacentric height 2.0 ft / 0.6 m
 Roll period: 11.3 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.36
 Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.523
 Length to Beam Ratio: 9.74 : 1
 'Natural speed' for length: 19.24 kts
 Power going to wave formation at top speed: 71 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  26.00 ft / 7.92 m
    - Forecastle (20 %): 24.00 ft / 7.32 m
    - Mid (36 %):  24.00 ft / 7.32 m (16.00 ft / 4.88 m aft of break)
    - Quarterdeck (15 %): 16.00 ft / 4.88 m
    - Stern:  16.00 ft / 4.88 m
    - Average freeboard: 19.04 ft / 5.80 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 176.8 %
  - Above water (accommodation/working, high = better): 140.0 %
 Waterplane Area: 9,566 Square feet or 889 Square metres
 Displacement factor (Displacement / loading): 69 %
 Structure weight / hull surface area: 34 lbs/sq ft or 164 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.42
  - Longitudinal: 2.50
  - Overall: 0.51
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent