GB/DL/1906, Great Britain Destroyer Leader laid down 1906 (Engine 1917) Displacement: 1,023 t light; 1,054 t standard; 1,200 t normal; 1,317 t full load Dimensions: Length overall / water x beam x draught 326.77 ft / 326.00 ft x 30.00 ft x 9.00 ft (normal load) 99.60 m / 99.36 m x 9.14 m x 2.74 m Armament: 4 - 3.46" / 88.0 mm guns in single mounts, 20.00lbs / 9.07kg shells, 1906 Model Breech loading guns in deck mounts with hoists on centreline ends, evenly spread, 2 raised mounts - superfiring Weight of broadside 80 lbs / 36 kg Shells per gun, main battery: 150 2 - 21.0" / 533.4 mm above water torpedoes Machinery: Oil fired boilers, steam turbines, Direct drive, 2 shafts, 29,369 shp / 21,909 Kw = 32.00 kts Range 3,200nm at 15.00 kts Bunker at max displacement = 263 tons Complement: 101 - 132 Cost: £0.138 million / $0.554 million Distribution of weights at normal displacement: Armament: 10 tons, 0.9 % Machinery: 671 tons, 55.9 % Hull, fittings & equipment: 342 tons, 28.5 % Fuel, ammunition & stores: 177 tons, 14.7 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 330 lbs / 150 Kg = 15.9 x 3.5 " / 88 mm shells or 0.2 torpedoes Stability (Unstable if below 1.00): 1.51 Metacentric height 1.7 ft / 0.5 m Roll period: 9.8 seconds Steadiness - As gun platform (Average = 50 %): 57 % - Recoil effect (Restricted arc if above 1.00): 0.18 Seaboat quality (Average = 1.00): 1.15 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.477 Length to Beam Ratio: 10.87 : 1 'Natural speed' for length: 18.06 kts Power going to wave formation at top speed: 68 % 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 %): 20.00 ft / 6.10 m - Mid (28 %): 20.00 ft / 6.10 m (12.00 ft / 3.66 m aft of break) - Quarterdeck (15 %): 12.00 ft / 3.66 m - Stern: 12.00 ft / 3.66 m - Average freeboard: 14.40 ft / 4.39 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 187.0 % - Above water (accommodation/working, high = better): 134.3 % Waterplane Area: 6,384 Square feet or 593 Square metres Displacement factor (Displacement / loading): 54 % Structure weight / hull surface area: 26 lbs/sq ft or 127 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.45 - Longitudinal: 1.93 - Overall: 0.53 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent
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Friday, July 22, 2005
The GB/DL/1906 redesigned
My friend Cliff's design for a large destroyer or destroyer leader armed with 88mm guns and having a speed of 32 knots works quite nicely, now that I understand better how to use Springsharp. I had originally expected to have to use a much later date for the machinery, and found that wasn't necessary. The dimensions, displacement, armament, and speed are what were originally planned. This is the Springsharp report:
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