Ger/DD/1905, Germany Destroyer laid down 1905 (Engine 1933) Displacement: 711 t light; 736 t standard; 797 t normal; 846 t full load Dimensions: Length overall / water x beam x draught 270.33 ft / 270.00 ft x 28.00 ft x 10.00 ft (normal load) 82.40 m / 82.30 m x 8.53 m x 3.05 m Armament: 2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model Quick firing guns in deck mounts with hoists on centreline ends, evenly spread, all raised mounts Weight of broadside 64 lbs / 29 kg Shells per gun, main battery: 250 2 - 18.0" / 457.2 mm above water torpedoes Machinery: Oil fired boilers, steam turbines, Direct drive, 2 shafts, 23,972 shp / 17,883 Kw = 32.00 kts Range 3,600nm at 12.00 kts Bunker at max displacement = 110 tons Complement: 74 - 97 Cost: £0.090 million / $0.361 million Distribution of weights at normal displacement: Armament: 8 tons, 1.0 % Machinery: 420 tons, 52.7 % Hull, fittings & equipment: 283 tons, 35.5 % Fuel, ammunition & stores: 86 tons, 10.8 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 233 lbs / 106 Kg = 7.3 x 4.0 " / 102 mm shells or 0.2 torpedoes Stability (Unstable if below 1.00): 1.24 Metacentric height 1.1 ft / 0.3 m Roll period: 11.2 seconds Steadiness - As gun platform (Average = 50 %): 63 % - Recoil effect (Restricted arc if above 1.00): 0.25 Seaboat quality (Average = 1.00): 1.02 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.369 Length to Beam Ratio: 9.64 : 1 'Natural speed' for length: 16.43 kts Power going to wave formation at top speed: 70 % Trim (Max stability = 0, Max steadiness = 100): 62 Bow angle (Positive = bow angles forward): 1.00 degrees Stern overhang: 0.00 ft / 0.00 m Freeboard (% = measuring location as a percentage of overall length): - Stem: 19.00 ft / 5.79 m - Forecastle (31 %): 18.00 ft / 5.49 m - Mid (31 %): 18.00 ft / 5.49 m (11.00 ft / 3.35 m aft of break) - Quarterdeck (15 %): 11.00 ft / 3.35 m - Stern: 11.00 ft / 3.35 m - Average freeboard: 13.29 ft / 4.05 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 178.2 % - Above water (accommodation/working, high = better): 112.7 % Waterplane Area: 4,594 Square feet or 427 Square metres Displacement factor (Displacement / loading): 55 % Structure weight / hull surface area: 29 lbs/sq ft or 140 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.49 - Longitudinal: 3.28 - Overall: 0.59 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is adequate
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Friday, February 04, 2005
Yet another run at the Ger/DD/1905 design
So, by going to higher power output machinery, I can make my F-class like design for a German destroyer for 1905 work. The ship was intended to make 32 knots and have 2-4in QF and 2-18in TT. That should be a pretty conservative design, only marginally edgy on speed.
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