Ger/CS/1905 Mod.A, Germany Scout Cruiser laid down 1905 (Engine 1950) Displacement: 2,028 t light; 2,103 t standard; 2,312 t normal; 2,479 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (372.95 ft / 370.00 ft) x 36.00 ft x (13.50 / 14.19 ft) (113.67 m / 112.78 m) x 10.97 m x (4.11 / 4.32 m) Armament: 3 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun Quick firing guns in deck and hoist mounts , 1905 Model 3 x Single mounts on centreline, evenly spread Aft Main mounts separated by engine room Weight of broadside 343 lbs / 343 kg 4 - 21.0" / 533 mm above water torpedoes Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 2.00" / 51 mm 185.00 ft / 56.39 m 8.00 ft / 2.44 m Ends: Unarmoured Upper: 2.00" / 51 mm 90.00 ft / 27.43 m 8.00 ft / 2.44 m Main Belt covers 77 % of normal length Main belt does not fully cover magazines and engineering spaces - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 2.00" / 51 mm - 2.00" / 51 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 2 shafts, 53,231 shp / 39,711 Kw = 34.00 kts Range 5,400nm at 14.00 kts Bunker at max displacement = 376 tons Complement: 166 - 216 Cost: £0.259 million / $1.036 million Distribution of weights at normal displacement: Armament: 101 tons, 4.4 % Armour: 219 tons, 9.5 % - Belts: 201 tons, 8.7 % - Torpedo bulkhead: 0 tons, 0.0 % - Armament: 18 tons, 0.8 % - Armour Deck: 0 tons, 0.0 % - Conning Tower: 0 tons, 0.0 % Machinery: 1,086 tons, 47.0 % Hull, fittings & equipment: 680 tons, 29.4 % Fuel, ammunition & stores: 284 tons, 12.3 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 684 lbs / 310 Kg = 6.3 x 6.0 " / 152 mm shells or 0.4 torpedoes Stability (Unstable if below 1.00): 1.23 Metacentric height 1.6 ft / 0.5 m Roll period: 12.0 seconds Steadiness - As gun platform (Average = 50 %): 51 % - Recoil effect (Restricted arc if above 1.00): 0.40 Seaboat quality (Average = 1.00): 1.02 Hull form characteristics: Hull has raised forecastle, a normal bow and a round stern Block coefficient (normal/deep): 0.450 / 0.459 Length to Beam Ratio: 10.28 : 1 'Natural speed' for length: 19.24 kts Power going to wave formation at top speed: 68 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 7.00 degrees Stern overhang: 0.00 ft / 0.00 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 29.00 %, 24.00 ft / 7.32 m, 22.00 ft / 6.71 m - Forward deck: 30.00 %, 14.00 ft / 4.27 m, 14.00 ft / 4.27 m - Aft deck: 26.00 %, 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: 16.55 ft / 5.05 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 166.0 % - Above water (accommodation/working, high = better): 108.2 % Waterplane Area: 8,496 Square feet or 789 Square metres Displacement factor (Displacement / loading): 74 % Structure weight / hull surface area: 38 lbs/sq ft or 186 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.51 - Longitudinal: 2.22 - Overall: 0.59 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is adequate
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Friday, June 15, 2007
Destroyers in Springsharp 3.0b1 Beta
One question that came to mind is if you can just accept the fact that destroyers will have a hard time in heavy weather and accept a seakeeping standard where they have less than 1.0 seakeeping in Springsharp 3.0b1. I have not been willing to do that, but the idea seems worth some experimentation. I have a design for the Ger/CS/1905 Mod.A scout cruiser that has 3-6in guns and four 21in TT with reloads. with my usual methods, I had to accept a 34 knot speed and some modifications to the dimensions to have adequate strength and seakeeping. What I found is that with a 35 knot speed, the design has seakeeping of 0.89. This is the Springsharp report for the design with acceptable seakeeping:
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