Ger/CM/1914, Germany Cruiser Minelayer laid down 1914 (Engine 1950) Displacement: 3,323 t light; 3,414 t standard; 3,733 t normal; 3,989 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (437.95 ft / 435.00 ft) x 38.00 ft x (17.00 / 17.81 ft) (133.49 m / 132.59 m) x 11.58 m x (5.18 / 5.43 m) Armament: 3 - 5.00" / 127 mm 45.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun Quick firing guns in deck and hoist mounts, 1914 Model 1 x Single mount on centreline forward 1 x Single mount on centreline, aft deck forward Weight of broadside 195 lbs / 88 kg 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, 99,257 shp / 74,046 Kw = 39.00 kts Range 4,800nm at 15.00 kts Bunker at max displacement = 575 tons Complement: 238 - 310 Cost: £0.562 million / $2.248 million Distribution of weights at normal displacement: Armament: 51 tons, 1.4 % Armour: 31 tons, 0.8 % - Armament: 31 tons, 0.8 % Machinery: 2,195 tons, 58.8 % Hull, fittings & equipment: 908 tons, 24.3 % Fuel, ammunition & stores: 411 tons, 11.0 % Miscellaneous weights: 138 tons, 3.7 % - On freeboard deck: 138 tons Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 740 lbs / 335 Kg = 11.8 x 5.0 " / 127 mm shells or 0.3 torpedoes Stability (Unstable if below 1.00): 1.21 Metacentric height 1.7 ft / 0.5 m Roll period: 12.4 seconds Steadiness - As gun platform (Average = 50 %): 60 % - Recoil effect (Restricted arc if above 1.00): 0.25 Seaboat quality (Average = 1.00): 1.10 Hull form characteristics: Hull has a flush deck, a normal bow and large transom stern Block coefficient (normal/deep): 0.465 / 0.474 Length to Beam Ratio: 11.45 : 1 'Natural speed' for length: 23.66 kts Power going to wave formation at top speed: 70 % Trim (Max stability = 0, Max steadiness = 100): 55 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: 20.00 %, 24.00 ft / 7.32 m, 22.00 ft / 6.71 m - Forward deck: 25.00 %, 22.00 ft / 6.71 m, 20.00 ft / 6.10 m - Aft deck: 40.00 %, 20.00 ft / 6.10 m, 18.00 ft / 5.49 m - Quarter deck: 15.00 %, 18.00 ft / 5.49 m, 18.00 ft / 5.49 m - Average freeboard: 20.11 ft / 6.13 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 194.2 % - Above water (accommodation/working, high = better): 175.5 % Waterplane Area: 11,095 Square feet or 1,031 Square metres Displacement factor (Displacement / loading): 73 % Structure weight / hull surface area: 36 lbs/sq ft or 173 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.42 - Longitudinal: 2.56 - Overall: 0.51 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent
Amazon Ad
Friday, September 28, 2007
An alternative Ger/CM/1914 design
There is a sketch of the largest ship in the family of specifications for fast German minelayers. That ship is flush-decked. That inspired me to try a flush-decked alternative to what I last wrote about. This would be a Ger/CM/1914 that tries to have a more typical draft, or at least not an oddly deep draft. That is the main difference. The ship might well not have had the mines on the upper deck, but I kept them there. The Germans only used 5in guns in my alternate universe, of course. This is at least a more rational design, in my opinion, although not quite as fast:
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment