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
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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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