Ger/CL/1915 design study, Germany Light Cruiser laid down 1915 (Engine 1950)
Displacement:
8,806 t light; 9,085 t standard; 9,491 t normal; 9,815 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(555.00 ft / 555.00 ft) x 50.00 ft x (19.00 / 19.54 ft)
(169.16 m / 169.16 m) x 15.24 m x (5.79 / 5.96 m)
Armament:
8 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
Quick firing guns in turret on barbette mounts, 1915 Model
4 x Single mounts on centreline ends, evenly spread
4 - 3.50" / 88.9 mm 45.0 cal guns - 21.62lbs / 9.81kg shells, 150 per gun
Anti-air guns in deck and hoist mounts, 1915 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 1,001 lbs / 454 kg
4 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.401 t each, 5.605 t total
In 2 sets of deck mounted side rotating tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.00" / 51 mm 320.00 ft / 97.54 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 89 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
0.60" / 15 mm 320.00 ft / 97.54 m 19.00 ft / 5.79 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
- Armoured deck - multiple decks: 1.00" / 25 mm For and Aft decks
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
- Conning towers: Forward 4.00" / 102 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 161,782 shp / 120,689 Kw = 37.00 kts
Range 4,200nm at 14.00 kts
Bunker at max displacement = 730 tons
Complement:
480 - 625
Cost:
£1.388 million / $5.554 million
Distribution of weights at normal displacement:
Armament: 320 tons, 3.4 %
- Guns: 314 tons, 3.3 %
- Torpedoes: 6 tons, 0.1 %
Armour: 1,042 tons, 11.0 %
- Belts: 320 tons, 3.4 %
- Torpedo bulkhead: 135 tons, 1.4 %
- Armament: 159 tons, 1.7 %
- Armour Deck: 389 tons, 4.1 %
- Conning Tower: 39 tons, 0.4 %
Machinery: 3,870 tons, 40.8 %
Hull, fittings & equipment: 3,573 tons, 37.7 %
Fuel, ammunition & stores: 685 tons, 7.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,948 lbs / 2,698 Kg = 55.1 x 6.0 " / 152 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 2.1 ft / 0.6 m
Roll period: 14.6 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.51
Seaboat quality (Average = 1.00): 1.03
Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a round stern
Block coefficient (normal/deep): 0.630 / 0.633
Length to Beam Ratio: 11.10 : 1
'Natural speed' for length: 23.56 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: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 30.00 ft / 9.14 m, 29.00 ft / 8.84 m
- Forward deck: 15.00 %, 29.00 ft / 8.84 m, 29.00 ft / 8.84 m
- Aft deck: 50.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- Quarter deck: 15.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- Average freeboard: 23.88 ft / 7.28 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 236.9 %
- Above water (accommodation/working, high = better): 185.2 %
Waterplane Area: 20,870 Square feet or 1,939 Square metres
Displacement factor (Displacement / loading): 97 %
Structure weight / hull surface area: 89 lbs/sq ft or 437 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.71
- Overall: 1.00
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is excellent
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