GB/CA/1941, Great Britain Armoured Cruiser laid down 1941
Displacement:
18,490 t light; 19,179 t standard; 20,198 t normal; 21,012 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(723.93 ft / 720.00 ft) x 80.00 ft x (23.00 / 23.72 ft)
(220.65 m / 219.46 m) x 24.38 m x (7.01 / 7.23 m)
Armament:
9 - 9.20" / 234 mm 50.0 cal guns - 412.17lbs / 186.96kg shells, 120 per gun
Breech loading guns in turret on barbette mounts , 1941 Model
3 x Triple mounts on centreline ends, majority forward
1 raised mount - superfiring
Aft Main mounts separated by engine room
12 - 4.00" / 102 mm 45.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
Anti-air guns in deck and hoist mounts , 1941 Model
6 x Twin mounts on sides, evenly spread
6 raised mounts
24 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 250 per gun
Anti-air guns in deck mounts , 1941 Model
2 x 2 row sextuple mounts on sides, evenly spread
2 raised mounts
2 x 2 row sextuple mounts on centreline, aft deck aft
1 raised mount - superfiring
Weight of broadside 4,141 lbs / 4,141 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 460.00 ft / 140.21 m 8.00 ft / 2.44 m
Ends: Unarmoured
Upper: 5.00" / 127 mm 460.00 ft / 140.21 m 8.00 ft / 2.44 m
Main Belt covers 98 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 4.00" / 102 mm 5.00" / 127 mm
2nd: 1.00" / 25 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm -
- Armour deck: 3.00" / 76 mm, Conning tower: 6.00" / 152 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 178,891 shp / 133,453 Kw = 35.00 kts
Range 5,400nm at 15.00 kts
Bunker at max displacement = 1,833 tons
Complement:
846 - 1,101
Cost:
£10.726 million / $42.906 million
Distribution of weights at normal displacement:
Armament: 1,016 tons, 5.0 %
Armour: 4,625 tons, 22.9 %
- Belts: 1,553 tons, 7.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 779 tons, 3.9 %
- Armour Deck: 2,197 tons, 10.9 %
- Conning Tower: 96 tons, 0.5 %
Machinery: 4,728 tons, 23.4 %
Hull, fittings & equipment: 8,630 tons, 42.7 %
Fuel, ammunition & stores: 1,708 tons, 8.5 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
28,034 lbs / 12,716 Kg = 72.0 x 9.2 " / 234 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 4.5 ft / 1.4 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.51
Seaboat quality (Average = 1.00): 1.14
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.534 / 0.538
Length to Beam Ratio: 9.00 : 1
'Natural speed' for length: 26.83 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 7.00 degrees
Stern overhang: -2.00 ft / -0.61 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 32.00 ft / 9.75 m, 29.00 ft / 8.84 m
- Forward deck: 30.00 %, 29.00 ft / 8.84 m, 27.00 ft / 8.23 m
- Aft deck: 35.00 %, 27.00 ft / 8.23 m, 25.00 ft / 7.62 m
- Quarter deck: 15.00 %, 25.00 ft / 7.62 m, 23.00 ft / 7.01 m
- Average freeboard: 27.14 ft / 8.27 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.4 %
- Above water (accommodation/working, high = better): 240.0 %
Waterplane Area: 39,587 Square feet or 3,678 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 140 lbs/sq ft or 683 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.58
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
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, March 03, 2007
The GB/CA/1941 is a super ship that works well in Springsharp
I have this pencil drawing, dated from the 1980's of the GB/CB/1941, which has considerable specifications, as well as the pencil drawing. I implemented the ship in Springsharp 3.0b Beta, and the ship works very well. The cruiser is armed with 9-9.2in/50 guns and has a top speed of 35 knots. I will post the drawing quite soon, as it is memorable. The armour basis is 5in. This is the Springsharp report:
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