GB/BB/1908 Design Study, Great Britain Battleship laid down 1908 (Engine 1917) Displacement: 24,739 t light; 25,701 t standard; 27,700 t normal; 29,299 t full load Dimensions: Length overall / water x beam x draught 570.00 ft / 570.00 ft x 105.00 ft x 26.00 ft (normal load) 173.74 m / 173.74 m x 32.00 m x 7.92 m Armament: 8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1908 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread, 2 raised mounts - superfiring 10 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1908 Model Quick firing guns in deck mounts with hoists on side, all amidships Weight of broadside 7,992 lbs / 3,625 kg Shells per gun, main battery: 90 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 10.0" / 254 mm 340.00 ft / 103.63 m 16.00 ft / 4.88 m Ends: Unarmoured Main Belt covers 92 % of normal length - Torpedo Bulkhead: 2.00" / 51 mm 340.00 ft / 103.63 m 26.00 ft / 7.92 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 10.0" / 254 mm 7.00" / 178 mm 10.0" / 254 mm 2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm - Armour deck: 7.00" / 178 mm, Conning tower: 10.00" / 254 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 69,224 shp / 51,641 Kw = 25.00 kts Range 6,500nm at 15.00 kts Bunker at max displacement = 3,598 tons Complement: 1,073 - 1,395 Cost: £2.060 million / $8.241 million Distribution of weights at normal displacement: Armament: 999 tons, 3.6 % Armour: 11,214 tons, 40.5 % - Belts: 2,488 tons, 9.0 % - Torpedo bulkhead: 654 tons, 2.4 % - Armament: 2,083 tons, 7.5 % - Armour Deck: 5,792 tons, 20.9 % - Conning Tower: 197 tons, 0.7 % Machinery: 2,538 tons, 9.2 % Hull, fittings & equipment: 9,988 tons, 36.1 % Fuel, ammunition & stores: 2,961 tons, 10.7 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 56,145 lbs / 25,467 Kg = 65.0 x 12.0 " / 305 mm shells or 10.3 torpedoes Stability (Unstable if below 1.00): 1.20 Metacentric height 7.6 ft / 2.3 m Roll period: 16.0 seconds Steadiness - As gun platform (Average = 50 %): 62 % - Recoil effect (Restricted arc if above 1.00): 0.36 Seaboat quality (Average = 1.00): 1.25 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.623 Length to Beam Ratio: 5.43 : 1 'Natural speed' for length: 23.87 kts Power going to wave formation at top speed: 56 % 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: 29.00 ft / 8.84 m - Forecastle (20 %): 26.00 ft / 7.92 m - Mid (72 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break) - Quarterdeck (15 %): 18.00 ft / 5.49 m - Stern: 18.00 ft / 5.49 m - Average freeboard: 24.00 ft / 7.32 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 71.0 % - Above water (accommodation/working, high = better): 193.7 % Waterplane Area: 44,722 Square feet or 4,155 Square metres Displacement factor (Displacement / loading): 114 % Structure weight / hull surface area: 166 lbs/sq ft or 812 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.93 - Longitudinal: 1.97 - Overall: 1.00 Hull space for machinery, storage, compartmentation is excellent Room for accommodation and workspaces is excellent Good seaboat, rides out heavy weather easily
Amazon Ad
Saturday, July 22, 2006
A rather odd design study for a GB/BB/1909 battleship
My friend Cliff was interested in exploring the space of possible battleship designs. The GB/BB/1909 design had rather thin turret and barbette armour (8in) and very thick deck armour (7in). The design study does not have a specification. I have an inboard profile and armour weights broken down. I also have a 26,000 ton Standard displacement and dimensions. The Cp is specified as 0.61. The drawing is annotated with armour thicknesses and the weights mention the deck thickness and the A/T bulkhead thickness (2in). I have adjusted the speed to be that which is achievable. The barrel lengths indicate that the guns are greater than 12in, so I moved up to 13.5in guns. This is the Springsharp report:
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment