GB/CB/1905 design study C1, Great Britain Battlecruiser laid down 1905
Displacement:
29,611 t light; 30,692 t standard; 35,293 t normal; 38,973 t full load
Dimensions: Length overall / water x beam x draught
770.00 ft / 770.00 ft x 85.00 ft x 27.00 ft (normal load)
234.70 m / 234.70 m x 25.91 m x 8.23 m
Armament:
8 - 12.00" / 305 mm guns (3 mounts), 864.00lbs / 391.90kg shells, 1905 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, all raised mounts - superfiring
Main guns limited to end-on fire
12 - 6.00" / 152 mm guns (9 mounts), 108.00lbs / 48.99kg shells, 1905 Model
Quick firing guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 8,208 lbs / 3,723 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 500.00 ft / 152.40 m 16.00 ft / 4.88 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.50" / 38 mm 500.00 ft / 152.40 m 23.00 ft / 7.01 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.0" / 254 mm 4.00" / 102 mm 8.00" / 203 mm
2nd: 2.00" / 51 mm - -
- Armour deck: 2.50" / 64 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 107,644 shp / 80,303 Kw = 28.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 8,282 tons
Complement:
1,286 - 1,673
Cost:
£3.040 million / $12.160 million
Distribution of weights at normal displacement:
Armament: 1,026 tons, 2.9 %
Armour: 7,132 tons, 20.2 %
- Belts: 2,032 tons, 5.8 %
- Torpedo bulkhead: 638 tons, 1.8 %
- Armament: 2,038 tons, 5.8 %
- Armour Deck: 2,424 tons, 6.9 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 8,155 tons, 23.1 %
Hull, fittings & equipment: 13,299 tons, 37.7 %
Fuel, ammunition & stores: 5,681 tons, 16.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
44,112 lbs / 20,009 Kg = 51.1 x 12.0 " / 305 mm shells or 4.4 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 4.8 ft / 1.5 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 86 %
- Recoil effect (Restricted arc if above 1.00): 1.16
Seaboat quality (Average = 1.00): 1.72
Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
Block coefficient: 0.699
Length to Beam Ratio: 9.06 : 1
'Natural speed' for length: 27.75 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: 37.00 ft / 11.28 m
- Forecastle (20 %): 34.00 ft / 10.36 m (33.00 ft / 10.06 m aft of break)
- Mid (73 %): 32.00 ft / 9.75 m (22.00 ft / 6.71 m aft of break)
- Quarterdeck (15 %): 22.00 ft / 6.71 m
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 30.21 ft / 9.21 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 126.6 %
- Above water (accommodation/working, high = better): 237.3 %
Waterplane Area: 52,413 Square feet or 4,869 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 163 lbs/sq ft or 794 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.42
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
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
Amazon Ad
Saturday, January 15, 2005
Frank Fox had argued for a armament of 8-12in guns
I just tried out an 8-12in gunned GB/CB/1905 with a 6in belt. The best speed I could get was 28 knots. The size is 35,293, normal displacement. By adjusting dimensions, I could probably do better. Hull strength is the issue. I am sure that my friend Cliff would really enjoy trying out Springsharp.
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