Ger/CL/1927, Germany Light Cruiser laid down 1927
Displacement:
8,667 t light; 8,983 t standard; 9,937 t normal; 10,701 t full load
Dimensions: Length overall / water x beam x draught
590.94 ft / 590.00 ft x 58.00 ft x 22.00 ft (normal load)
180.12 m / 179.83 m x 17.68 m x 6.71 m
Armament:
9 - 5.91" / 150 mm guns (3x3 guns), 102.98lbs / 46.71kg shells, 1927 Model
Quick firing guns in turrets (on barbettes)
on centreline ends, majority forward, all raised mounts - superfiring
10 - 4.13" / 105 mm guns (5x2 guns), 35.32lbs / 16.02kg shells, 1927 Model
Dual purpose guns in deck mounts with hoists
on side ends, majority aft, all raised mounts - superfiring
18 - 1.46" / 37.0 mm guns (9x2 guns), 1.55lbs / 0.70kg shells, 1927 Model
Dual purpose guns in deck mounts
on side ends, majority forward
Weight of broadside 1,308 lbs / 593 kg
Shells per gun, main battery: 150
12 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 465.00 ft / 141.73 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 121 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.00" / 25 mm 465.00 ft / 141.73 m 16.00 ft / 4.88 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 2.00" / 51 mm 3.00" / 76 mm
2nd: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm
- Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 80,944 shp / 60,384 Kw = 33.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 1,718 tons
Complement:
496 - 646
Cost:
£2.903 million / $11.613 million
Distribution of weights at normal displacement:
Armament: 163 tons, 1.6 %
Armour: 2,115 tons, 21.3 %
- Belts: 675 tons, 6.8 %
- Torpedo bulkhead: 275 tons, 2.8 %
- Armament: 288 tons, 2.9 %
- Armour Deck: 848 tons, 8.5 %
- Conning Tower: 30 tons, 0.3 %
Machinery: 2,555 tons, 25.7 %
Hull, fittings & equipment: 3,833 tons, 38.6 %
Fuel, ammunition & stores: 1,271 tons, 12.8 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,066 lbs / 5,473 Kg = 117.2 x 5.9 " / 150 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 2.9 ft / 0.9 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 1.03
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.462
Length to Beam Ratio: 10.17 : 1
'Natural speed' for length: 27.81 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 2.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27.00 ft / 8.23 m
- Forecastle (30 %): 23.00 ft / 7.01 m
- Mid (50 %): 23.00 ft / 7.01 m (15.00 ft / 4.57 m aft of break)
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 19.48 ft / 5.94 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 147.5 %
- Above water (accommodation/working, high = better): 119.5 %
Waterplane Area: 22,908 Square feet or 2,128 Square metres
Displacement factor (Displacement / loading): 116 %
Structure weight / hull surface area: 102 lbs/sq ft or 499 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.35
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
This is a forum for discussion of topics relating to the Dreadnought era, prior to the ascendency of naval aviation. We will be discussing history, ship design, and naval wargaming.
Saturday, January 29, 2005
The Ger/CL/1927 design
I have a 1927 design for the Germans, and it works quite nicely, except for the size. Again, the SHP/ton is the problem.
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