Ger/DL/1915 alternate version, Germany Destroyer Leader laid down 1915 (Engine 1950) Displacement: 1,745 t light; 1,818 t standard; 2,006 t normal; 2,156 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (394.23 ft / 390.00 ft) x 40.00 ft x (12.00 / 12.54 ft) (120.16 m / 118.87 m) x 12.19 m x (3.66 / 3.82 m) Armament: 4 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun Quick firing guns in deck and hoist mounts, 1915 Model 4 x Single mounts on centreline ends, evenly spread 2 raised mounts - superfiring Weight of broadside 260 lbs / 118 kg 6 - 23.6" / 599 mm, 23.00 ft / 7.01 m torpedoes - 1.818 t each, 10.908 t total In 3 sets of deck mounted carriage/fixed tubes Armour: - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 3.00" / 76 mm 2.00" / 51 mm 3.00" / 76 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 2 shafts, 47,569 shp / 35,487 Kw = 36.00 kts Range 4,000nm at 15.00 kts Bunker at max displacement = 338 tons Complement: 149 - 194 Cost: £0.328 million / $1.311 million Distribution of weights at normal displacement: Armament: 90 tons, 4.5 % - Guns: 79 tons, 4.0 % - Torpedoes: 11 tons, 0.5 % Armour: 60 tons, 3.0 % - Armament: 60 tons, 3.0 % Machinery: 974 tons, 48.5 % Hull, fittings & equipment: 621 tons, 31.0 % Fuel, ammunition & stores: 260 tons, 13.0 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 640 lbs / 290 Kg = 10.2 x 5.0 " / 127 mm shells or 0.4 torpedoes Stability (Unstable if below 1.00): 1.18 Metacentric height 1.7 ft / 0.5 m Roll period: 12.9 seconds Steadiness - As gun platform (Average = 50 %): 58 % - Recoil effect (Restricted arc if above 1.00): 0.36 Seaboat quality (Average = 1.00): 1.01 Hull form characteristics: Hull has rise forward of midbreak, a normal bow and large transom stern Block coefficient (normal/deep): 0.375 / 0.386 Length to Beam Ratio: 9.75 : 1 'Natural speed' for length: 22.99 kts Power going to wave formation at top speed: 67 % Trim (Max stability = 0, Max steadiness = 100): 57 Bow angle (Positive = bow angles forward): 10.00 degrees Stern overhang: 0.00 ft / 0.00 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 20.00 %, 24.00 ft / 7.32 m, 22.00 ft / 6.71 m - Forward deck: 21.00 %, 22.00 ft / 6.71 m, 22.00 ft / 6.71 m - Aft deck: 44.00 %, 14.00 ft / 4.27 m, 14.00 ft / 4.27 m - Quarter deck: 15.00 %, 14.00 ft / 4.27 m, 14.00 ft / 4.27 m - Average freeboard: 17.44 ft / 5.32 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 169.5 % - Above water (accommodation/working, high = better): 202.2 % Waterplane Area: 9,809 Square feet or 911 Square metres Displacement factor (Displacement / loading): 77 % Structure weight / hull surface area: 36 lbs/sq ft or 176 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.44 - Longitudinal: 1.84 - Overall: 0.51 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent
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Friday, September 14, 2007
The Ger/DL/1915 alternate version
An alternative version of a German destroyer leader for 1915 was 390ft long and had a beam of 40ft. I had thought that giving up one 5in mount and adding a twin 23.6in TT mount would be beneficial. With that, the design could achieve a 36 knot speed. The "look" is very German, although of a later era. There is long forecastle and two funnels with prominent caps. This the Springsharp report:
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