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
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.
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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