The Ger/CL/1917 fast light cruiser

The exact designation of this design is not written in the Red Book, but I am calling it the Ger/CL/1917. The ship was intended to be similar to the later Italian very fast light cruisers. The armament is 8-6in QF guns in turrets, 4-4in QF guns in mounts with shields, and 4-23.6in TT. Protection is limited to the turrets and barbettes. The displacement and draft are greater than was planned, to satisfy Springsharp. The original plan was for 5,000 tons Standard and 6,500 tons full load. The draft was intended to be 16.3ft at normal load. I have previously called this design the Ger/CL/1919. This is the photograph of one of the ships from the broadside:

This is the Springsharp report:

Ger/CL/1917, Germany Light Cruiser laid down 1917 (Engine 1941)

Displacement:
 6,490 t light; 6,720 t standard; 7,250 t normal; 7,674 t full load

Dimensions: Length overall / water x beam x draught
 555.00 ft / 555.00 ft x 55.00 ft x 18.00 ft (normal load)
 169.16 m / 169.16 m x 16.76 m  x 5.49 m

Armament:
      8 - 6.00" / 152 mm guns (4x2 guns), 108.00lbs / 48.99kg shells, 1917 Model
   Quick firing guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1917 Model
   Quick firing guns in deck mounts with hoists
   on side, evenly spread
 Weight of broadside 992 lbs / 450 kg
 Shells per gun, main battery: 150
 4 - 23.6" / 600.0001 mm above water torpedoes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 1.00" / 25 mm 1.00" / 25 mm  1.00" / 25 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 113,060 shp / 84,342 Kw = 36.00 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 954 tons

Complement:
 392 - 510

Cost:
 £1.363 million / $5.452 million

Distribution of weights at normal displacement:
 Armament: 124 tons, 1.7 %
 Armour: 89 tons, 1.2 %
    - Belts: 0 tons, 0.0 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 89 tons, 1.2 %
    - Armour Deck: 0 tons, 0.0 %
    - Conning Tower: 0 tons, 0.0 %
 Machinery: 2,988 tons, 41.2 %
 Hull, fittings & equipment: 3,289 tons, 45.4 %
 Fuel, ammunition & stores: 760 tons, 10.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   4,856 lbs / 2,203 Kg = 45.0 x 6.0 " / 152 mm shells or 0.8 torpedoes
 Stability (Unstable if below 1.00): 1.27
 Metacentric height 3.1 ft / 1.0 m
 Roll period: 13.0 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.36
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.462
 Length to Beam Ratio: 10.09 : 1
 'Natural speed' for length: 23.56 kts
 Power going to wave formation at top speed: 62 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: -1.00 ft / -0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  28.00 ft / 8.53 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (37 %):  26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
    - Quarterdeck (15 %): 18.00 ft / 5.49 m
    - Stern:  18.00 ft / 5.49 m
    - Average freeboard: 21.12 ft / 6.44 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 146.6 %
  - Above water (accommodation/working, high = better): 170.0 %
 Waterplane Area: 19,664 Square feet or 1,827 Square metres
 Displacement factor (Displacement / loading): 103 %
 Structure weight / hull surface area: 95 lbs/sq ft or 463 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.02
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent