Ger/BB/1905, Germany Battleship laid down 1905
Displacement:
20,998 t light; 21,870 t standard; 25,100 t normal; 27,684 t full load
Dimensions: Length overall / water x beam x draught
580.00 ft / 580.00 ft x 90.00 ft x 26.60 ft (normal load)
176.78 m / 176.78 m x 27.43 m x 8.11 m
Armament:
8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1905 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
Quick firing guns in casemate mounts
on side, all amidships
Weight of broadside 7,296 lbs / 3,309 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.0" / 254 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m
Ends: 4.00" / 102 mm 130.00 ft / 39.62 m 8.00 ft / 2.44 m
80.00 ft / 24.38 m Unarmoured ends
Upper: 8.00" / 203 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m
Main Belt covers 98 % of normal length
- Torpedo Bulkhead:
2.00" / 51 mm 370.00 ft / 112.78 m 26.00 ft / 7.92 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.0" / 279 mm 8.00" / 203 mm 11.0" / 279 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
- Armour deck: 3.00" / 76 mm, Conning tower: 11.00" / 279 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 45,227 shp / 33,739 Kw = 23.00 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 5,814 tons
Complement:
996 - 1,296
Cost:
£1.981 million / $7.923 million
Distribution of weights at normal displacement:
Armament: 912 tons, 3.6 %
Armour: 7,782 tons, 31.0 %
- Belts: 2,496 tons, 9.9 %
- Torpedo bulkhead: 712 tons, 2.8 %
- Armament: 2,187 tons, 8.7 %
- Armour Deck: 2,184 tons, 8.7 %
- Conning Tower: 203 tons, 0.8 %
Machinery: 3,426 tons, 13.7 %
Hull, fittings & equipment: 8,878 tons, 35.4 %
Fuel, ammunition & stores: 4,102 tons, 16.3 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
38,109 lbs / 17,286 Kg = 44.1 x 12.0 " / 305 mm shells or 5.9 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 5.3 ft / 1.6 m
Roll period: 16.4 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0.64
Seaboat quality (Average = 1.00): 1.60
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.633
Length to Beam Ratio: 6.44 : 1
'Natural speed' for length: 24.08 kts
Power going to wave formation at top speed: 49 %
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: 29.00 ft / 8.84 m
- Forecastle (20 %): 26.00 ft / 7.92 m
- Mid (67 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
- Quarterdeck (15 %): 18.00 ft / 5.49 m
- Stern: 18.00 ft / 5.49 m
- Average freeboard: 23.60 ft / 7.19 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92.6 %
- Above water (accommodation/working, high = better): 179.0 %
Waterplane Area: 39,356 Square feet or 3,656 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 158 lbs/sq ft or 771 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.73
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
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, July 31, 2006
From the original high-level specification for the Ger/BB/1905 in the Blue Book
We have finished a pass through the Red Book and I am now going through the Blue Book. I am starting with the original high level specifications for the ships in the German 1905 building program. The first are the four battleships to be built in 1905, which were 580ft x 90ft x 26.6ft, with a Standard displacement of 22,000 tons, 8-12in/45 BLR and 12-4in QF guns. The belt is specified to be 10in. The speed wanted is 23 knots. I am using normal weight machinery. All boilers are oil-fired. This is the Springsharp report:
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