The KM, in 1938, is feeling CL poor with the transfer of the Karlsruhe's to Turkey and no new construction CLs since the Leipzigs of 1929. Given the success of the General Belgrano design for Argentina, a cousin of that design and the Peruvian Quechua is being commissioned for the KM.
Ersatz Karlsruhe, Germany Light Cruiser laid down 1938
Displacement:
9,790 t light; 10,224 t standard; 11,215 t normal; 12,007 t full load
Dimensions: Length overall / water x beam x draught
644.64 ft / 623.36 ft x 63.98 ft x 19.69 ft (normal load)
196.48 m / 190.00 m x 19.50 m x 6.00 m
Armament:
15 - 5.91" / 150 mm guns (5x3 guns), 100.31lbs / 45.50kg shells, 1938 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 2 raised mounts - superfiring
12 - 4.13" / 105 mm guns (6x2 guns), 35.32lbs / 16.02kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Dual purpose guns in deck mounts
on side, evenly spread
8 - 0.79" / 20.0 mm guns (2x4 guns), 0.24lbs / 0.11kg shells, 1936 Model
Machine guns in deck mounts
on side ends, evenly spread, all raised mounts
32 - 0.79" / 20.0 mm guns (8x4 guns), 0.24lbs / 0.11kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 1,963 lbs / 890 kg
Shells per gun, main battery: 180
16 - 23.6" / 600 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 405.18 ft / 123.50 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 2.76" / 70 mm 4.72" / 120 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
3rd: 0.79" / 20 mm 0.39" / 10 mm -
4th: 0.39" / 10 mm - -
5th: 0.39" / 10 mm - -
- Armour deck: 1.97" / 50 mm, Conning tower: 5.91" / 150 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 77,647 shp / 57,925 Kw = 32.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 1,783 tons
Complement:
544 - 708
Cost:
£4.795 million / $19.178 million
Distribution of weights at normal displacement:
Armament: 250 tons, 2.2 %
Armour: 2,593 tons, 23.1 %
- Belts: 917 tons, 8.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 606 tons, 5.4 %
- Armour Deck: 1,006 tons, 9.0 %
- Conning Tower: 64 tons, 0.6 %
Machinery: 2,126 tons, 19.0 %
Hull, fittings & equipment: 4,661 tons, 41.6 %
Fuel, ammunition & stores: 1,424 tons, 12.7 %
Miscellaneous weights: 160 tons, 1.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
17,955 lbs / 8,144 Kg = 174.4 x 5.9 " / 150 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 3.2 ft / 1.0 m
Roll period: 15.1 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.46
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.74 : 1
'Natural speed' for length: 28.55 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.17 ft / 9.50 m
- Forecastle (20 %): 21.33 ft / 6.50 m
- Mid (50 %): 21.33 ft / 6.50 m (20.51 ft / 6.25 m aft of break)
- Quarterdeck (15 %): 20.51 ft / 6.25 m
- Stern: 20.51 ft / 6.25 m
- Average freeboard: 21.70 ft / 6.62 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 81.3 %
- Above water (accommodation/working, high = better): 131.4 %
Waterplane Area: 27,632 Square feet or 2,567 Square metres
Displacement factor (Displacement / loading): 124 %
Structure weight / hull surface area: 109 lbs/sq ft or 531 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.38
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
30 tons reserved for radar
80 tons reserved for aircraft
40 tons reserved for reload torpedoes