GB/CB/1921 14in guns 38 knots, Great Britain Battlecruiser laid down 1923 (Engine 1940) Displacement: 43,543 t light; 45,203 t standard; 48,500 t normal; 51,137 t full load Dimensions: Length overall / water x beam x draught 881.32 ft / 878.00 ft x 114.00 ft x 33.00 ft (normal load) 268.63 m / 267.61 m x 34.75 m x 10.06 m Armament: 9 - 14.00" / 356 mm guns (3x3 guns), 1,372.00lbs / 622.33kg shells, 1923 Model Breech loading guns in turrets (on barbettes) on centreline ends, majority forward, 1 raised mount - superfiring 16 - 4.70" / 119 mm guns (6 mounts), 51.91lbs / 23.55kg shells, 1923 Model Quick firing guns in turrets (on barbettes) on side, all amidships, 4 raised mounts - superfiring 6 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1923 Model Anti-aircraft guns in deck mounts with hoists on side, all amidships, all raised mounts - superfiring 24 - 1.57" / 40.0 mm guns (6x4 guns), 1.95lbs / 0.89kg shells, 1923 Model Anti-aircraft guns in deck mounts with hoists on side, evenly spread, all raised mounts Weight of broadside 13,537 lbs / 6,140 kg Shells per gun, main battery: 90 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 7.00" / 178 mm 580.00 ft / 176.78 m 16.00 ft / 4.88 m Ends: Unarmoured Main Belt covers 102 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 1.00" / 25 mm 580.00 ft / 176.78 m 33.00 ft / 10.06 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 9.00" / 229 mm 6.00" / 152 mm 9.00" / 229 mm 2nd: 3.00" / 76 mm 3.00" / 76 mm 3.00" / 76 mm - Armour deck: 4.00" / 102 mm, Conning tower: 9.00" / 229 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 6 shafts, 337,652 shp / 251,888 Kw = 38.00 kts Range 7,500nm at 18.00 kts Bunker at max displacement = 5,934 tons Complement: 1,633 - 2,124 Cost: £12.245 million / $48.981 million Distribution of weights at normal displacement: Armament: 1,692 tons, 3.5 % Armour: 11,812 tons, 24.4 % - Belts: 2,763 tons, 5.7 % - Torpedo bulkhead: 708 tons, 1.5 % - Armament: 2,884 tons, 5.9 % - Armour Deck: 5,200 tons, 10.7 % - Conning Tower: 258 tons, 0.5 % Machinery: 9,028 tons, 18.6 % Hull, fittings & equipment: 21,010 tons, 43.3 % Fuel, ammunition & stores: 4,957 tons, 10.2 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 69,860 lbs / 31,688 Kg = 50.9 x 14.0 " / 356 mm shells or 8.0 torpedoes Stability (Unstable if below 1.00): 1.16 Metacentric height 8.0 ft / 2.4 m Roll period: 16.9 seconds Steadiness - As gun platform (Average = 50 %): 51 % - Recoil effect (Restricted arc if above 1.00): 0.49 Seaboat quality (Average = 1.00): 1.03 Hull form characteristics: Hull has a flush deck and transom stern Block coefficient: 0.514 Length to Beam Ratio: 7.70 : 1 'Natural speed' for length: 34.49 kts Power going to wave formation at top speed: 60 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 5.00 degrees Stern overhang: 0.00 ft / 0.00 m Freeboard (% = measuring location as a percentage of overall length): - Stem: 38.00 ft / 11.58 m - Forecastle (20 %): 32.00 ft / 9.75 m - Mid (35 %): 32.00 ft / 9.75 m - Quarterdeck (15 %): 32.00 ft / 9.75 m - Stern: 32.00 ft / 9.75 m - Average freeboard: 32.48 ft / 9.90 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 105.3 % - Above water (accommodation/working, high = better): 262.3 % Waterplane Area: 70,264 Square feet or 6,528 Square metres Displacement factor (Displacement / loading): 112 % Structure weight / hull surface area: 206 lbs/sq ft or 1,008 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.95 - Longitudinal: 1.65 - Overall: 1.00 Hull space for machinery, storage, compartmentation is adequate Room for accommodation and workspaces is excellent
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Thursday, November 30, 2006
"Up to my old tricks": a 38 knot ship with 9-14in guns
I could not resist doing my usual thing ("My old tricks"). I tried a 38 knot battlecruiser with 9-14in guns. The belt is 7in and the deck is 4in. The secondary and AA armaments are what I have been using. They are unchanged from the other ships in this series. I still like having a big ship that will outrun smaller ships in a seaway. There is essentially nothing at sea that this ship cannot catch. Some smaller ships may be faster in a flat calm, for a short time, but in normal conditions, they will not be able to run away. This ship can outrun anything, but aircraft, that could damage it. This is the Springsharp report:
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