GB/CA/1905, Great Britain Armored Cruiser laid down 1905 (Engine 1914)
Displacement:
16,384 t light; 17,349 t standard; 19,602 t normal; 21,405 t full load
Dimensions: Length overall / water x beam x draught
565.00 ft / 565.00 ft x 84.00 ft x 26.00 ft (normal load)
172.21 m / 172.21 m x 25.60 m x 7.92 m
Armament:
16 - 9.20" / 234 mm guns (8x2 guns), 389.34lbs / 176.60kg shells, 1905 Model
Breech loading guns in turrets (on barbettes)
on side ends, evenly spread, all raised mounts - superfiring
16 - 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, all raised mounts - superfiring
Weight of broadside 6,742 lbs / 3,058 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 320.00 ft / 97.54 m 17.00 ft / 5.18 m
Ends: 4.00" / 102 mm 230.00 ft / 70.10 m 17.00 ft / 5.18 m
15.00 ft / 4.57 m Unarmoured ends
Main Belt covers 87 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.50" / 38 mm 320.00 ft / 97.54 m 24.00 ft / 7.32 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 4.00" / 102 mm 6.00" / 152 mm
2nd: 2.00" / 51 mm - -
- Armour deck: 2.50" / 64 mm, Conning tower: 6.00" / 152 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 52,378 shp / 39,074 Kw = 25.00 kts
Range 8,500nm at 15.00 kts
Bunker at max displacement = 4,056 tons
Complement:
827 - 1,076
Cost:
£1.564 million / $6.255 million
Distribution of weights at normal displacement:
Armament: 843 tons, 4.3 %
Armour: 5,872 tons, 30.0 %
- Belts: 2,040 tons, 10.4 %
- Torpedo bulkhead: 426 tons, 2.2 %
- Armament: 1,771 tons, 9.0 %
- Armour Deck: 1,541 tons, 7.9 %
- Conning Tower: 94 tons, 0.5 %
Machinery: 2,018 tons, 10.3 %
Hull, fittings & equipment: 7,652 tons, 39.0 %
Fuel, ammunition & stores: 3,218 tons, 16.4 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
31,049 lbs / 14,084 Kg = 79.7 x 9.2 " / 234 mm shells or 5.1 torpedoes
Stability (Unstable if below 1.00): 1.03
Metacentric height 4.1 ft / 1.2 m
Roll period: 17.5 seconds
Steadiness - As gun platform (Average = 50 %): 64 %
- Recoil effect (Restricted arc if above 1.00): 0.82
Seaboat quality (Average = 1.00): 1.28
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.556
Length to Beam Ratio: 6.73 : 1
'Natural speed' for length: 23.77 kts
Power going to wave formation at top speed: 52 %
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: 28.00 ft / 8.53 m
- Forecastle (20 %): 25.00 ft / 7.62 m
- Mid (67 %): 25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
- Quarterdeck (15 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 22.60 ft / 6.89 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88.4 %
- Above water (accommodation/working, high = better): 174.8 %
Waterplane Area: 33,309 Square feet or 3,094 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 156 lbs/sq ft or 759 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.69
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
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.
Saturday, April 30, 2005
A British armored cruiser design
This is similar to one of the altenative designs being considered in 1904-1905. This is like an armored cruiser version of the Untakeable battleship design. The armament is 9.2 in guns with an anti-torpedo boat armament of 4in QF guns. This is the Springsharp report:
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