Ger/BB/1915 60,000 tons, Germany Enter ship type laid down 1915 (Engine 1927)
Displacement:
57,453 t light; 60,116 t standard; 62,500 t normal; 64,407 t full load
Dimensions: Length overall / water x beam x draught
752.31 ft / 750.00 ft x 130.00 ft x 34.00 ft (normal load)
229.30 m / 228.60 m x 39.62 m x 10.36 m
Armament:
9 - 18.00" / 457 mm guns (3x3 guns), 2,916.00lbs / 1,322.68kg shells, 1915 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 6.00" / 152 mm guns (8x2 guns), 108.00lbs / 48.99kg shells, 1915 Model
Quick firing guns in turrets (on barbettes)
on side, all amidships, 4 raised mounts - superfiring
Weight of broadside 27,972 lbs / 12,688 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 18.0" / 457 mm 400.00 ft / 121.92 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 82 % of normal length
- Torpedo Bulkhead:
8.00" / 203 mm 400.00 ft / 121.92 m 33.00 ft / 10.06 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18.0" / 457 mm 10.0" / 254 mm 18.0" / 457 mm
2nd: 6.00" / 152 mm 6.00" / 152 mm 6.00" / 152 mm
- Armour deck: 8.00" / 203 mm, Conning tower: 18.00" / 457 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 75,252 shp / 56,138 Kw = 23.00 kts
Range 5,400nm at 15.00 kts
Bunker at max displacement = 4,290 tons
Complement:
1,976 - 2,569
Cost:
£7.681 million / $30.723 million
Distribution of weights at normal displacement:
Armament: 3,497 tons, 5.6 %
Armour: 27,773 tons, 44.4 %
- Belts: 5,734 tons, 9.2 %
- Torpedo bulkhead: 3,907 tons, 6.3 %
- Armament: 6,367 tons, 10.2 %
- Armour Deck: 11,155 tons, 17.8 %
- Conning Tower: 611 tons, 1.0 %
Machinery: 2,375 tons, 3.8 %
Hull, fittings & equipment: 23,808 tons, 38.1 %
Fuel, ammunition & stores: 5,047 tons, 8.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
112,576 lbs / 51,063 Kg = 38.6 x 18.0 " / 457 mm shells or 27.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 9.2 ft / 2.8 m
Roll period: 18.0 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.61
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.660
Length to Beam Ratio: 5.77 : 1
'Natural speed' for length: 27.39 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 4.00 degrees
Stern overhang: -1.00 ft / -0.30 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 33.00 ft / 10.06 m
- Forecastle (20 %): 25.00 ft / 7.62 m
- Mid (50 %): 25.00 ft / 7.62 m
- Quarterdeck (15 %): 25.00 ft / 7.62 m
- Stern: 25.00 ft / 7.62 m
- Average freeboard: 25.64 ft / 7.82 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 64.7 %
- Above water (accommodation/working, high = better): 181.6 %
Waterplane Area: 75,369 Square feet or 7,002 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 241 lbs/sq ft or 1,175 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.64
- 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
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.
Sunday, June 11, 2006
The Ger/BB/1915 60,000 tons from a weight perspective
I had tried to go with the weight specifications given on the next page in the Red Book for the Ger/BB/1915 60,000 tons design, but the armour was too much for the ship and I had to decrease the protection weight, and lower the freeboard to stay at about 60,000 tons standard. The armament is 9-18in BLR and 16-6in QF guns. This ship was designed for the wargame campaign where there were aircraft and submarines were not used. It was intended as a counterweight to the GB/BB/1915 BBX design. This is the Springsharp report:
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