GB/DL/1906, Great Britain Destroyer Leader laid down 1906 (Engine 1941) Displacement: 1,167 t light; 1,215 t standard; 1,350 t normal; 1,458 t full load Dimensions: Length overall / water x beam x draught 325.77 ft / 325.00 ft x 30.00 ft x 12.00 ft (normal load) 99.29 m / 99.06 m x 9.14 m x 3.66 m Armament: 4 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1906 Model Quick firing guns in deck mounts with hoists on centreline, evenly spread Aft Main mounts separated by engine room Weight of broadside 83 lbs / 38 kg Shells per gun, main battery: 450 2 - 18.0" / 457.2 mm above water torpedoes Machinery: Oil fired boilers, steam turbines, Direct drive, 2 shafts, 44,471 shp / 33,175 Kw = 35.00 kts Range 3,750nm at 15.00 kts Bunker at max displacement = 243 tons Complement: 110 - 144 Cost: £0.157 million / $0.626 million Distribution of weights at normal displacement: Armament: 10 tons, 0.8 % Machinery: 764 tons, 56.6 % Hull, fittings & equipment: 393 tons, 29.1 % Fuel, ammunition & stores: 183 tons, 13.5 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 326 lbs / 148 Kg = 15.7 x 3.5 " / 88 mm shells or 0.2 torpedoes Stability (Unstable if below 1.00): 1.46 Metacentric height 1.6 ft / 0.5 m Roll period: 10.0 seconds Steadiness - As gun platform (Average = 50 %): 55 % - Recoil effect (Restricted arc if above 1.00): 0.17 Seaboat quality (Average = 1.00): 1.09 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.404 Length to Beam Ratio: 10.83 : 1 'Natural speed' for length: 18.03 kts Power going to wave formation at top speed: 70 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 2.00 degrees Stern overhang: 0.00 ft / 0.00 m Freeboard (% = measuring location as a percentage of overall length): - Stem: 22.00 ft / 6.71 m - Forecastle (20 %): 20.50 ft / 6.25 m - Mid (32 %): 20.50 ft / 6.25 m (12.50 ft / 3.81 m aft of break) - Quarterdeck (15 %): 12.50 ft / 3.81 m - Stern: 12.50 ft / 3.81 m - Average freeboard: 15.18 ft / 4.63 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 189.7 % - Above water (accommodation/working, high = better): 130.5 % Waterplane Area: 6,015 Square feet or 559 Square metres Displacement factor (Displacement / loading): 55 % Structure weight / hull surface area: 28 lbs/sq ft or 136 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.43 - Longitudinal: 2.79 - Overall: 0.52 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent
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Sunday, October 02, 2005
The 2001 version of the GB/DL/1906
If you allow very lightweight machinery, the GB/DL/1906 design works fairly well in Springsharp. I believe that the intended standard displacement was 1,200 tons. I used a greater normal displacement that gives a 1,215 ton standard displacement. I was able to achieve the 35 knot speed with a 15 knot cruising speed. The armament is 4-88mm (2opdr) QF guns and 2-18in TT (I could not in good conscience give them 21in TT in 1906), although that was the original intent. This is the Springsharp report:
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