Ger/CL/1914, Germany Light Cruiser laid down 1914 (Engine 1933)
Displacement:
3,820 t light; 3,957 t standard; 4,307 t normal; 4,588 t full load
Dimensions: Length overall / water x beam x draught
437.80 ft / 435.00 ft x 43.00 ft x 20.00 ft (normal load)
133.44 m / 132.59 m x 13.11 m x 6.10 m
Armament:
9 - 5.12" / 130 mm guns in single mounts, 67.03lbs / 30.41kg shells, 1914 Model
Breech loading guns in deck mounts with hoists
on side ends, majority forward, all raised mounts - superfiring
Weight of broadside 603 lbs / 274 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: 2.00" / 51 mm - -
- Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 54,846 shp / 40,915 Kw = 32.00 kts
Range 4,500nm at 15.00 kts
Bunker at max displacement = 632 tons
Complement:
265 - 345
Cost:
£0.536 million / $2.142 million
Distribution of weights at normal displacement:
Armament: 75 tons, 1.8 %
Armour: 496 tons, 11.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 52 tons, 1.2 %
- Armour Deck: 427 tons, 9.9 %
- Conning Tower: 17 tons, 0.4 %
Machinery: 1,598 tons, 37.1 %
Hull, fittings & equipment: 1,651 tons, 38.3 %
Fuel, ammunition & stores: 487 tons, 11.3 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,605 lbs / 1,182 Kg = 38.9 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.9 ft / 0.6 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.403
Length to Beam Ratio: 10.12 : 1
'Natural speed' for length: 20.86 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 2.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (32 %): 21.00 ft / 6.40 m
- Mid (32 %): 21.00 ft / 6.40 m (13.00 ft / 3.96 m aft of break)
- Quarterdeck (15 %): 13.00 ft / 3.96 m
- Stern: 13.00 ft / 3.96 m
- Average freeboard: 15.82 ft / 4.82 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 133.7 %
- Above water (accommodation/working, high = better): 87.7 %
Waterplane Area: 11,534 Square feet or 1,072 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 75 lbs/sq ft or 368 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.14
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
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Monday, January 31, 2005
My latest attempt at the Ger/CL/1914 design
The Ger/CL/1914 design is essentially a 3rd Class protected cruiser, whose sole protection is a 2in deck. That does some interesting things. For one, hull strength is easier to achieve. My current strategy for increasing hull strength while having a good seakeeping ability is to increase the draft. That will increase the composite strength by some amount. From there, I reduce the displacement to reduce the composite strength back to 1.0. That should increase the seakeeping ability. I keep doing that until I have a seakeeping ability above 1.0 along with adequate composite strength. As you can see, I increased the date on the engine, to get a better SHP/ton of machinery (to 34.32 SHP/ton). Real ships in 1914 actually were better than that. This is an issue with Springsharp that we can hope will be corrected.
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