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
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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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