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
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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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