Project 743, Netherlands Battleship laid down 1912 Displacement: 18,331 t light; 19,384 t standard; 21,300 t normal; 22,832 t full load Dimensions: Length overall / water x beam x draught 541.78 ft / 541.34 ft x 88.58 ft x 27.89 ft (normal load) 165.13 m / 165.00 m x 27.00 m x 8.50 m Armament: 8 - 13.50" / 343 mm guns (4x2 guns), 1,231.27lbs / 558.49kg shells, 1912 Model Breech loading guns in turrets (on barbettes) on side ends, evenly spread, all raised mounts - superfiring 12 - 5.91" / 150 mm guns in single mounts, 102.98lbs / 46.71kg shells, 1912 Model Breech loading guns in casemate mounts on side, all amidships 12 guns in hull casemates - Limited use in heavy seas Weight of broadside 11,086 lbs / 5,028 kg Shells per gun, main battery: 100 Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 9.84" / 250 mm 360.89 ft / 110.00 m 1.97 ft / 0.60 m Ends: 3.94" / 100 mm 164.04 ft / 50.00 m 1.97 ft / 0.60 m 16.40 ft / 5.00 m Unarmoured ends Upper: 7.87" / 200 mm 360.89 ft / 110.00 m 0.82 ft / 0.25 m Main Belt covers 103 % of normal length - Torpedo Bulkhead: 1.57" / 40 mm 360.89 ft / 110.00 m 21.33 ft / 6.50 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 13.5" / 343 mm 6.69" / 170 mm 11.8" / 300 mm 2nd: 5.91" / 150 mm - - - Armour deck: 1.97" / 50 mm, Conning tower: 15.75" / 400 mm Machinery: Coal fired boilers, steam turbines, Direct drive, 3 shafts, 34,263 shp / 25,560 Kw = 22.00 kts Range 7,500nm at 12.00 kts Bunker at max displacement = 3,448 tons (100% coal) Complement: 881 - 1,146 Cost: £2.016 million / $8.064 million Distribution of weights at normal displacement: Armament: 1,386 tons, 6.5 % Armour: 5,256 tons, 24.7 % - Belts: 453 tons, 2.1 % - Torpedo bulkhead: 448 tons, 2.1 % - Armament: 2,866 tons, 13.5 % - Armour Deck: 1,227 tons, 5.8 % - Conning Tower: 261 tons, 1.2 % Machinery: 1,503 tons, 7.1 % Hull, fittings & equipment: 10,186 tons, 47.8 % Fuel, ammunition & stores: 2,969 tons, 13.9 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 30,680 lbs / 13,916 Kg = 24.9 x 13.5 " / 343 mm shells or 5.0 torpedoes Stability (Unstable if below 1.00): 1.03 Metacentric height 4.4 ft / 1.3 m Roll period: 17.7 seconds Steadiness - As gun platform (Average = 50 %): 49 % - Recoil effect (Restricted arc if above 1.00): 0.98 Seaboat quality (Average = 1.00): 1.47 Hull form characteristics: Hull has rise forward of midbreak Block coefficient: 0.557 Length to Beam Ratio: 6.11 : 1 'Natural speed' for length: 23.27 kts Power going to wave formation at top speed: 48 % Trim (Max stability = 0, Max steadiness = 100): 33 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: 25.26 ft / 7.70 m - Forecastle (20 %): 25.26 ft / 7.70 m - Mid (67 %): 26.25 ft / 8.00 m (16.40 ft / 5.00 m aft of break) - Quarterdeck (15 %): 16.40 ft / 5.00 m - Stern: 16.40 ft / 5.00 m - Average freeboard: 22.57 ft / 6.88 m Ship tends to be wet forward Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 93.1 % - Above water (accommodation/working, high = better): 168.8 % Waterplane Area: 33,702 Square feet or 3,131 Square metres Displacement factor (Displacement / loading): 110 % Structure weight / hull surface area: 206 lbs/sq ft or 1,008 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.97 - Longitudinal: 2.30 - Overall: 1.06 Hull space for machinery, storage, compartmentation is adequate Room for accommodation and workspaces is excellent Good seaboat, rides out heavy weather easily
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Thursday, May 12, 2005
There is an interesting page about Dutch battleships considered prior to WWI
While I was looking to see if I could find anything about the Dutch navy during 1890-1910, I found this page, which tells about the ships that the Dutch considered building. The idea was to replace the older coast defense battleships with more potent designs. The page is titled: Road to Strength: Battleshipplan 1912. There is data and drawings. The Dreadnought-style design from Krupp-Germania (Project 743) is particularly interesting. The ship was to carry 8-13.5in and 12-5.9in guns. The speed was 22 knots. The displacement was to be 21,300 tons. The belt was a maximum of 250mm. There is only the drawing and no dimensions, but tried to estimate the size. This is a Springsharp report for what I tried:
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