Ger/CB/1905, Germany Battlecruiser laid down 1905 (Engine 1909)
Displacement:
16,767 t light; 17,325 t standard; 19,000 t normal; 20,340 t full load
Dimensions: Length overall / water x beam x draught
700.00 ft / 700.00 ft x 80.00 ft x 24.40 ft (normal load)
213.36 m / 213.36 m x 24.38 m x 7.44 m
Armament:
4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1905 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
10 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
Quick firing guns in casemate mounts
on side, evenly spread
4 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
Breech loading guns in deck mounts with hoists
on side, evenly spread, all raised mounts
Weight of broadside 3,904 lbs / 1,771 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 550.00 ft / 167.64 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 121 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.50" / 38 mm 550.00 ft / 167.64 m 24.00 ft / 7.32 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
2nd: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm
3rd: 2.00" / 51 mm - -
- Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 104,749 shp / 78,142 Kw = 31.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 3,014 tons
Complement:
808 - 1,051
Cost:
£1.663 million / $6.653 million
Distribution of weights at normal displacement:
Armament: 488 tons, 2.6 %
Armour: 4,141 tons, 21.8 %
- Belts: 1,524 tons, 8.0 %
- Torpedo bulkhead: 733 tons, 3.9 %
- Armament: 429 tons, 2.3 %
- Armour Deck: 1,364 tons, 7.2 %
- Conning Tower: 92 tons, 0.5 %
Machinery: 4,761 tons, 25.1 %
Hull, fittings & equipment: 7,376 tons, 38.8 %
Fuel, ammunition & stores: 2,233 tons, 11.8 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
24,353 lbs / 11,046 Kg = 28.2 x 12.0 " / 305 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.36
Metacentric height 6.2 ft / 1.9 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 68 %
- Recoil effect (Restricted arc if above 1.00): 0.32
Seaboat quality (Average = 1.00): 1.36
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.487
Length to Beam Ratio: 8.75 : 1
'Natural speed' for length: 26.46 kts
Power going to wave formation at top speed: 52 %
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: 28.00 ft / 8.53 m
- Forecastle (20 %): 25.00 ft / 7.62 m
- Mid (61 %): 25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
- Quarterdeck (15 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 22.12 ft / 6.74 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 134.1 %
- Above water (accommodation/working, high = better): 191.6 %
Waterplane Area: 36,866 Square feet or 3,425 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 133 lbs/sq ft or 650 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.30
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
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, July 09, 2005
A variant of the Ger/CB/1915 design ("Blücher")
I have an early sketch of the Ger/CB/1905 light battlecruiser design that has a better secondary battery than the other versions. The ship has the same 4-12in/45 BLR but has 10-4in QF guns in casemates and then 4-4in QF guns in shields mounted on the superstructure, giving 14-4in QF guns. The ship otherwise is consistent with the rather sparse specification. The original cost was estimated at £1,710,000. This is the Springsharp report:
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