F/CA/1917, France Armoured Cruiser laid down 1917 (Engine 1927) Displacement: 15,142 t light; 15,884 t standard; 16,962 t normal; 17,825 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (703.59 ft / 694.00 ft) x 74.00 ft x (20.00 / 20.82 ft) (214.45 m / 211.53 m) x 22.56 m x (6.10 / 6.35 m) Armament: 8 - 9.40" / 239 mm 55.0 cal guns - 449.00lbs / 203.66kg shells, 150 per gun Breech loading guns in turret on barbette mounts, 1917 Model 2 x Quad mounts on centreline, forward deck forward 1 raised mount - superfiring 12 - 5.50" / 140 mm 55.0 cal guns - 90.00lbs / 40.82kg shells, 150 per gun Quick firing guns in turret on barbette mounts, 1917 Model 4 x Triple mounts on sides, aft deck forward 8 - 3.40" / 86.4 mm 50.0 cal guns - 20.80lbs / 9.44kg shells, 150 per gun Anti-air guns in deck and hoist mounts, 1917 Model 4 x Twin mounts on sides, aft deck aft 4 raised mounts Weight of broadside 4,838 lbs / 2,195 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 6.00" / 152 mm 450.00 ft / 137.16 m 12.00 ft / 3.66 m Ends: Unarmoured Main Belt covers 100 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 1.00" / 25 mm 450.00 ft / 137.16 m 19.00 ft / 5.79 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 4.00" / 102 mm 3.00" / 76 mm 4.00" / 102 mm 2nd: 3.00" / 76 mm 3.00" / 76 mm 3.00" / 76 mm - Box over magazines: 3.00" / 76 mm - Conning towers: Forward 6.00" / 152 mm, Aft 0.00" / 0 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 4 shafts, 130,832 shp / 97,601 Kw = 33.00 kts Range 5,600nm at 15.00 kts Bunker at max displacement = 1,940 tons Complement: 743 - 966 Cost: £3.021 million / $12.082 million Distribution of weights at normal displacement: Armament: 1,320 tons, 7.8 % Armour: 2,527 tons, 14.9 % - Belts: 1,345 tons, 7.9 % - Torpedo bulkhead: 316 tons, 1.9 % - Armament: 657 tons, 3.9 % - Armour Deck: 123 tons, 0.7 % - Conning Tower: 85 tons, 0.5 % Machinery: 4,130 tons, 24.3 % Hull, fittings & equipment: 7,165 tons, 42.2 % Fuel, ammunition & stores: 1,820 tons, 10.7 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 18,873 lbs / 8,561 Kg = 45.4 x 9.4 " / 239 mm shells or 2.4 torpedoes Stability (Unstable if below 1.00): 1.13 Metacentric height 4.0 ft / 1.2 m Roll period: 15.5 seconds Steadiness - As gun platform (Average = 50 %): 53 % - Recoil effect (Restricted arc if above 1.00): 0.71 Seaboat quality (Average = 1.00): 1.06 Hull form characteristics: Hull has rise forward of midbreak, an extended bulbous bow and a cruiser stern Block coefficient (normal/deep): 0.578 / 0.583 Length to Beam Ratio: 9.38 : 1 'Natural speed' for length: 26.34 kts Power going to wave formation at top speed: 56 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 12.00 degrees Stern overhang: 3.00 ft / 0.91 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 27.00 %, 31.00 ft / 9.45 m, 27.00 ft / 8.23 m - Forward deck: 36.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m - Aft deck: 21.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Quarter deck: 16.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Average freeboard: 24.47 ft / 7.46 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 149.1 % - Above water (accommodation/working, high = better): 226.9 % Waterplane Area: 36,795 Square feet or 3,418 Square metres Displacement factor (Displacement / loading): 106 % Structure weight / hull surface area: 141 lbs/sq ft or 690 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.96 - Longitudinal: 1.34 - Overall: 1.00 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent
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Monday, July 02, 2007
My concept for a fast French armoured cruiser
I have had this concept for a fast armoured cruiser with two turrets forward. I usually cast it as a French ship. This version has 8-9.4in/55 BLR, 12-5.5in/55, and 8-3.4in AA guns. With armour basis is 6in with a 3in deck. This is the Springsharp report:
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