GB/BB/1914, Great Britain Battleship laid down 1914 (Engine 1921)
Displacement:
55,114 t light; 57,560 t standard; 60,672 t normal; 63,161 t full load
Dimensions: Length overall / water x beam x draught
801.08 ft / 800.00 ft x 120.00 ft x 35.00 ft (normal load)
244.17 m / 243.84 m x 36.58 m x 10.67 m
Armament:
9 - 18.00" / 457 mm guns (3x3 guns), 2,916.00lbs / 1,322.68kg shells, 1914 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, all raised mounts - superfiring
20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1914 Model
Quick firing guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
Weight of broadside 27,494 lbs / 12,471 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 18.0" / 457 mm 540.00 ft / 164.59 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 104 % of normal length
- Torpedo Bulkhead:
3.00" / 76 mm 540.00 ft / 164.59 m 27.00 ft / 8.23 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18.0" / 457 mm 8.00" / 203 mm 15.0" / 381 mm
2nd: 2.00" / 51 mm - -
- Armour deck: 7.00" / 178 mm, Conning tower: 9.00" / 229 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 85,368 shp / 63,685 Kw = 25.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 5,601 tons
Complement:
1,932 - 2,512
Cost:
£6.653 million / $26.612 million
Distribution of weights at normal displacement:
Armament: 3,437 tons, 5.7 %
Armour: 23,915 tons, 39.4 %
- Belts: 7,154 tons, 11.8 %
- Torpedo bulkhead: 1,618 tons, 2.7 %
- Armament: 5,074 tons, 8.4 %
- Armour Deck: 9,769 tons, 16.1 %
- Conning Tower: 299 tons, 0.5 %
Machinery: 2,940 tons, 4.8 %
Hull, fittings & equipment: 24,822 tons, 40.9 %
Fuel, ammunition & stores: 5,558 tons, 9.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
98,124 lbs / 44,508 Kg = 33.7 x 18.0 " / 457 mm shells or 17.7 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 6.9 ft / 2.1 m
Roll period: 19.2 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.94
Seaboat quality (Average = 1.00): 1.48
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.632
Length to Beam Ratio: 6.67 : 1
'Natural speed' for length: 32.89 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 2.00 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 (18 %): 25.00 ft / 7.62 m
- Mid (0 %): 25.00 ft / 7.62 m (24.00 ft / 7.32 m aft of break)
- Quarterdeck (18 %): 25.00 ft / 7.62 m
- Stern: 25.00 ft / 7.62 m
- Average freeboard: 25.01 ft / 7.62 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 70.0 %
- Above water (accommodation/working, high = better): 181.2 %
Waterplane Area: 75,437 Square feet or 7,008 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 249 lbs/sq ft or 1,213 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.49
- 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
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.
Sunday, March 13, 2005
Another run at the GB/BB/1914 design in Springsharp
Cliff's GB/BB/1914 design was supposed to be somewhere between 45,000 and 48,500 tons normal displacement. To make it work in Springsharp, with the sort of minimal specs I used, the design ended more on the order of 60,000 tons, except with a greater draft (35ft). I was able to make the 18in belt work. I just found the original drawing, and it shows a flush deck, probably with a transom stern, a single, trunked funnel, and a tower mast (very anachronistic, but that's the breaks). I keep wanting to recalculate ships, for better or worse. This is the new Springsharp report:
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