Ger/BB/1909A, Germany Enter ship type laid down 1909
Displacement:
27,603 t light; 28,674 t standard; 31,587 t normal; 33,917 t full load
Dimensions: Length overall / water x beam x draught
645.00 ft / 645.00 ft x 106.00 ft x 30.00 ft (normal load)
196.60 m / 196.60 m x 32.31 m x 9.14 m
Armament:
9 - 12.00" / 305 mm guns (3x3 guns), 864.00lbs / 391.90kg shells, 1909 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread, all raised mounts
Aft Main mounts separated by engine room
8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1909 Model
Quick firing guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 8,640 lbs / 3,919 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 395.00 ft / 120.40 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 94 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.0" / 356 mm 6.00" / 152 mm 14.0" / 356 mm
2nd: 2.00" / 51 mm - -
- Armour deck: 5.00" / 127 mm, Conning tower: 14.00" / 356 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 67,534 shp / 50,380 Kw = 25.00 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 5,244 tons
Complement:
1,184 - 1,540
Cost:
£2.303 million / $9.212 million
Distribution of weights at normal displacement:
Armament: 1,080 tons, 3.4 %
Armour: 10,652 tons, 33.7 %
- Belts: 2,949 tons, 9.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3,033 tons, 9.6 %
- Armour Deck: 4,368 tons, 13.8 %
- Conning Tower: 301 tons, 1.0 %
Machinery: 3,070 tons, 9.7 %
Hull, fittings & equipment: 12,801 tons, 40.5 %
Fuel, ammunition & stores: 3,984 tons, 12.6 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
61,039 lbs / 27,687 Kg = 70.6 x 12.0 " / 305 mm shells or 5.7 torpedoes
Stability (Unstable if below 1.00): 1.04
Metacentric height 5.9 ft / 1.8 m
Roll period: 18.4 seconds
Steadiness - As gun platform (Average = 50 %): 86 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.73
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.539
Length to Beam Ratio: 6.08 : 1
'Natural speed' for length: 25.40 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 m
- Forecastle (20 %): 30.00 ft / 9.14 m
- Mid (72 %): 30.00 ft / 9.14 m (20.00 ft / 6.10 m aft of break)
- Quarterdeck (15 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 27.28 ft / 8.31 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 57.9 %
- Above water (accommodation/working, high = better): 212.7 %
Waterplane Area: 47,226 Square feet or 4,387 Square metres
Displacement factor (Displacement / loading): 124 %
Structure weight / hull surface area: 188 lbs/sq ft or 920 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.28
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
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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Saturday, January 08, 2005
The Ger/BB/1909A design is another good one
The Ger/BB/1909A design actually outperformed what I had calculated back in the the early 1970's. I was able to have about the same displacement and still have a 14in armor basis, with 25 knot speed. The armament is 9-12in guns in triple turrets: two forward and one aft. The secondary armament is too light, but what I had though adequate at the time: 8-6in QF. Too boot, it is a good seaboat. This is the report:
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