GB/CL/1932, Great Britain Light Cruiser laid down 1932 (Engine 1950) Displacement: 12,524 t light; 12,989 t standard; 14,045 t normal; 14,889 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (669.64 ft / 665.00 ft) x 64.00 ft x (21.00 / 21.96 ft) (204.11 m / 202.69 m) x 19.51 m x (6.40 / 6.69 m) Armament: 15 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun Quick firing guns in turret on barbette mounts, 1932 Model 5 x Triple mounts on centreline forward 2 raised mounts - superfiring 12 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun Anti-air guns in deck and hoist mounts, 1932 Model 6 x Twin mounts on sides, forward deck aft 24 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 150 per gun Anti-air guns in deck mounts, 1932 Model 4 x 2 row sextuple mounts on sides, aft deck forward 4 raised mounts Weight of broadside 1,935 lbs / 877 kg 16 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.469 t each, 23.507 t total In 4 sets of deck mounted side rotating tubes Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 3.00" / 76 mm 460.00 ft / 140.21 m 16.00 ft / 4.88 m Ends: Unarmoured Main Belt covers 106 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 0.80" / 20 mm 460.00 ft / 140.21 m 21.00 ft / 6.40 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 3.00" / 76 mm 3.00" / 76 mm 3.00" / 76 mm - Armoured deck - multiple decks: 2.00" / 51 mm For and Aft decks Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 4 shafts, 158,334 shp / 118,117 Kw = 37.00 kts Range 5,600nm at 17.00 kts Bunker at max displacement = 1,900 tons Complement: 644 - 838 Cost: £5.405 million / $21.620 million Distribution of weights at normal displacement: Armament: 556 tons, 4.0 % - Guns: 532 tons, 3.8 % - Torpedoes: 24 tons, 0.2 % Armour: 2,731 tons, 19.4 % - Belts: 898 tons, 6.4 % - Torpedo bulkhead: 286 tons, 2.0 % - Armament: 394 tons, 2.8 % - Armour Deck: 1,152 tons, 8.2 % Machinery: 3,788 tons, 27.0 % Hull, fittings & equipment: 5,449 tons, 38.8 % Fuel, ammunition & stores: 1,521 tons, 10.8 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 17,609 lbs / 7,987 Kg = 163.0 x 6.0 " / 152 mm shells or 2.2 torpedoes Stability (Unstable if below 1.00): 1.11 Metacentric height 3.1 ft / 1.0 m Roll period: 15.2 seconds Steadiness - As gun platform (Average = 50 %): 52 % - Recoil effect (Restricted arc if above 1.00): 0.46 Seaboat quality (Average = 1.00): 1.05 Hull form characteristics: Hull has rise forward of midbreak, a normal bow and large transom stern Block coefficient (normal/deep): 0.550 / 0.558 Length to Beam Ratio: 10.39 : 1 'Natural speed' for length: 29.19 kts Power going to wave formation at top speed: 62 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 8.00 degrees Stern overhang: 0.00 ft / 0.00 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 32.00 %, 33.00 ft / 10.06 m, 27.00 ft / 8.23 m - Forward deck: 30.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m - Aft deck: 23.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Quarter deck: 15.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Average freeboard: 24.73 ft / 7.54 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 148.6 % - Above water (accommodation/working, high = better): 211.5 % Waterplane Area: 30,923 Square feet or 2,873 Square metres Displacement factor (Displacement / loading): 113 % Structure weight / hull surface area: 110 lbs/sq ft or 538 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.95 - Longitudinal: 1.65 - Overall: 1.00 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent
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Monday, December 31, 2007
A 37 knot British light cruiser
I thought that the next step would be to create a British light cruiser that was like the Japanese Mogami class ships. Obviously, such a ship must be larger than 10,000 tons standard. The amazing thing is the displacement is not that extreme, due to the use of very lightweight machinery. This is the Springsharp report for the GB/CL/1932:
Sunday, December 30, 2007
A 35 knot British light cruiser for 1921
I was hoping that a British light cruiser for 1921 that could make 35 knots might not have to be so large, but this one is over 10,000 tons standard. The armament is 9-6in/50 QF guns, 6-4.7in AA guns, and 12-21in TT. The armour belt is 3in and the deck is 2in. I suppose that having the underwater protection like this is what makes the design have to be large:
GB/CL/1921, Great Britain Light Cruiser laid down 1921 (Engine 1941) Displacement: 10,248 t light; 10,605 t standard; 11,409 t normal; 12,053 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (640.08 ft / 636.00 ft) x 62.00 ft x (19.00 / 19.81 ft) (195.10 m / 193.85 m) x 18.90 m x (5.79 / 6.04 m) Armament: 9 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun Quick firing guns in turret on barbette mounts, 1921 Model 3 x Triple mounts on centreline ends, evenly spread 6 - 4.70" / 119 mm 45.0 cal guns - 52.35lbs / 23.75kg shells, 150 per gun Anti-air guns in deck and hoist mounts, 1921 Model 6 x Single mounts on sides, aft deck forward 6 raised mounts Weight of broadside 1,343 lbs / 609 kg 12 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.425 t each, 17.102 t total In 4 sets of deck mounted side rotating tubes Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 3.00" / 76 mm 415.00 ft / 126.49 m 16.00 ft / 4.88 m Ends: Unarmoured Main Belt covers 100 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 0.70" / 18 mm 415.00 ft / 126.49 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 - Armoured deck - multiple decks: 2.00" / 51 mm For and Aft decks Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm - Conning towers: Forward 4.00" / 102 mm, Aft 0.00" / 0 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 4 shafts, 120,149 shp / 89,631 Kw = 35.00 kts Range 5,200nm at 16.00 kts Bunker at max displacement = 1,448 tons Complement: 551 - 717 Cost: £2.396 million / $9.584 million Distribution of weights at normal displacement: Armament: 363 tons, 3.2 % - Guns: 346 tons, 3.0 % - Torpedoes: 17 tons, 0.1 % Armour: 2,373 tons, 20.8 % - Belts: 818 tons, 7.2 % - Torpedo bulkhead: 204 tons, 1.8 % - Armament: 273 tons, 2.4 % - Armour Deck: 1,035 tons, 9.1 % - Conning Tower: 44 tons, 0.4 % Machinery: 3,175 tons, 27.8 % Hull, fittings & equipment: 4,336 tons, 38.0 % Fuel, ammunition & stores: 1,162 tons, 10.2 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 14,633 lbs / 6,637 Kg = 135.5 x 6.0 " / 152 mm shells or 2.0 torpedoes Stability (Unstable if below 1.00): 1.19 Metacentric height 3.4 ft / 1.0 m Roll period: 14.2 seconds Steadiness - As gun platform (Average = 50 %): 52 % - Recoil effect (Restricted arc if above 1.00): 0.30 Seaboat quality (Average = 1.00): 1.04 Hull form characteristics: Hull has rise forward of midbreak, a normal bow and small transom stern Block coefficient (normal/deep): 0.533 / 0.540 Length to Beam Ratio: 10.26 : 1 'Natural speed' for length: 26.97 kts Power going to wave formation at top speed: 59 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 8.00 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 %, 29.00 ft / 8.84 m, 27.00 ft / 8.23 m - Forward deck: 15.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m - Aft deck: 50.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Quarter deck: 15.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m - Average freeboard: 21.96 ft / 6.69 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 150.3 % - Above water (accommodation/working, high = better): 196.5 % Waterplane Area: 27,746 Square feet or 2,578 Square metres Displacement factor (Displacement / loading): 114 % Structure weight / hull surface area: 102 lbs/sq ft or 499 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.96 - Longitudinal: 1.32 - Overall: 1.00 Hull space for machinery, storage, compartmentation is cramped Room for accommodation and workspaces is excellent
Saturday, December 22, 2007
My concept for a fast battlecruiser with 10-15in guns
The GB/CB/1921 design study is my current concept for what a fast, lightly armoured battlecruiser should be. This is a flush-decked ship with a flared bow and a wide transom stern. The main armament is in two quadruple turrets and one superfiring twin turret. The armour is all-or-nothing style, but only a 5in inclined belt. I thought that the ship needed a 33 knot speed. This is the Springsharp report:
GB/CB/1921, Great Britain Battlecruiser laid down 1921 (Engine 1950) Displacement: 32,346 t light; 34,134 t standard; 36,346 t normal; 38,115 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (813.39 ft / 800.00 ft) x 102.00 ft x (28.50 / 29.55 ft) (247.92 m / 243.84 m) x 31.09 m x (8.69 / 9.01 m) Armament: 10 - 15.00" / 381 mm 45.0 cal guns - 1,950.00lbs / 884.51kg shells, 90 per gun Breech loading guns in turret on barbette mounts, 1921 Model 2 x Quad mounts on centreline ends, evenly spread 1 x Twin mount on centreline, forward deck centre 1 raised mount 16 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun Quick firing guns in deck and hoist mounts, 1921 Model 8 x Twin mounts on sides, evenly spread 4 raised mounts Weight of broadside 20,540 lbs / 9,317 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 5.00" / 127 mm 445.00 ft / 135.64 m 17.00 ft / 5.18 m Ends: Unarmoured Main Belt covers 86 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead: 4.00" / 102 mm 445.00 ft / 135.64 m 28.50 ft / 8.69 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 7.00" / 178 mm 5.00" / 127 mm 7.00" / 178 mm 2nd: 4.00" / 102 mm 3.00" / 76 mm 4.00" / 102 mm - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm - Conning towers: Forward 7.00" / 178 mm, Aft 0.00" / 0 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 4 shafts, 171,431 shp / 127,887 Kw = 33.00 kts Range 6,500nm at 17.00 kts Bunker at max displacement = 3,980 tons Complement: 1,316 - 1,711 Cost: £8.667 million / $34.669 million Distribution of weights at normal displacement: Armament: 3,079 tons, 8.5 % Armour: 8,859 tons, 24.4 % - Belts: 1,656 tons, 4.6 % - Torpedo bulkhead: 1,877 tons, 5.2 % - Armament: 1,853 tons, 5.1 % - Armour Deck: 3,308 tons, 9.1 % - Conning Tower: 165 tons, 0.5 % Machinery: 4,101 tons, 11.3 % Hull, fittings & equipment: 16,307 tons, 44.9 % Fuel, ammunition & stores: 4,000 tons, 11.0 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 53,072 lbs / 24,073 Kg = 31.5 x 15.0 " / 381 mm shells or 8.2 torpedoes Stability (Unstable if below 1.00): 1.20 Metacentric height 7.2 ft / 2.2 m Roll period: 16.0 seconds Steadiness - As gun platform (Average = 50 %): 52 % - Recoil effect (Restricted arc if above 1.00): 0.80 Seaboat quality (Average = 1.00): 1.04 Hull form characteristics: Hull has a flush deck, an extended bulbous bow and large transom stern Block coefficient (normal/deep): 0.547 / 0.553 Length to Beam Ratio: 7.84 : 1 'Natural speed' for length: 32.74 kts Power going to wave formation at top speed: 55 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 17.00 degrees Stern overhang: 3.00 ft / 0.91 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 20.00 %, 34.00 ft / 10.36 m, 27.00 ft / 8.23 m - Forward deck: 30.00 %, 27.00 ft / 8.23 m, 23.00 ft / 7.01 m - Aft deck: 35.00 %, 23.00 ft / 7.01 m, 23.00 ft / 7.01 m - Quarter deck: 15.00 %, 23.00 ft / 7.01 m, 23.00 ft / 7.01 m - Average freeboard: 24.96 ft / 7.61 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 98.4 % - Above water (accommodation/working, high = better): 204.7 % Waterplane Area: 59,118 Square feet or 5,492 Square metres Displacement factor (Displacement / loading): 109 % Structure weight / hull surface area: 213 lbs/sq ft or 1,041 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.96 - Longitudinal: 1.46 - Overall: 1.00 Hull space for machinery, storage, compartmentation is adequate Room for accommodation and workspaces is excellent
Thursday, December 20, 2007
A radical GB/CB/1915 design
This design for a GB/CB/1915 battlecruiser seems inspired by the Super Lion concept. The ship has 10-15in/45 guns (as originally specified, not the real 15in/42 guns) and 16-5in/50 QF guns in shields, mounted on the deck. The armour is light, the machinery is a light as is possible. The speed is 32 knots. The original specification had a beam of 90ft, but a viable design is not possible in Springsharp with such a narrow beam. This is the Springsharp report:
GB/CB/1915, Great Britain Battlecruiser laid down 1915 (Engine 1950) Displacement: 33,175 t light; 34,959 t standard; 36,852 t normal; 38,366 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (807.00 ft / 800.00 ft) x 104.00 ft x (26.50 / 27.38 ft) (245.97 m / 243.84 m) x 31.70 m x (8.08 / 8.35 m) Armament: 10 - 15.00" / 381 mm 45.0 cal guns - 1,920.00lbs / 870.90kg shells, 90 per gun Breech loading guns in turret on barbette mounts, 1915 Model 4 x Twin mounts on centreline ends, evenly spread 2 raised mounts - superfiring 1 x Twin mount on centreline, aft deck forward 16 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun Quick firing guns in deck and hoist mounts, 1915 Model 16 x Single mounts on sides, evenly spread 4 raised mounts Weight of broadside 20,240 lbs / 9,181 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 5.00" / 127 mm 575.00 ft / 175.26 m 17.00 ft / 5.18 m Ends: 3.00" / 76 mm 200.00 ft / 60.96 m 12.00 ft / 3.66 m 25.00 ft / 7.62 m Unarmoured ends Main Belt covers 111 % of normal length - Torpedo Bulkhead: 2.00" / 51 mm 575.00 ft / 175.26 m 26.50 ft / 8.08 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 7.00" / 178 mm 5.00" / 127 mm 7.00" / 178 mm 2nd: 4.00" / 102 mm 2.00" / 51 mm 4.00" / 102 mm - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm - Conning towers: Forward 7.00" / 178 mm, Aft 0.00" / 0 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 4 shafts, 182,116 shp / 135,859 Kw = 32.00 kts Range 6,500nm at 16.00 kts Bunker at max displacement = 3,407 tons Complement: 1,329 - 1,728 Cost: £5.047 million / $20.188 million Distribution of weights at normal displacement: Armament: 3,141 tons, 8.5 % Armour: 9,321 tons, 25.3 % - Belts: 2,304 tons, 6.3 % - Torpedo bulkhead: 1,128 tons, 3.1 % - Armament: 2,368 tons, 6.4 % - Armour Deck: 3,355 tons, 9.1 % - Conning Tower: 167 tons, 0.5 % Machinery: 4,357 tons, 11.8 % Hull, fittings & equipment: 16,355 tons, 44.4 % Fuel, ammunition & stores: 3,677 tons, 10.0 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 54,224 lbs / 24,596 Kg = 32.1 x 15.0 " / 381 mm shells or 7.7 torpedoes Stability (Unstable if below 1.00): 1.17 Metacentric height 7.1 ft / 2.2 m Roll period: 16.4 seconds Steadiness - As gun platform (Average = 50 %): 52 % - Recoil effect (Restricted arc if above 1.00): 0.87 Seaboat quality (Average = 1.00): 1.03 Hull form characteristics: Hull has rise forward of midbreak, a ram bow and a cruiser stern Block coefficient (normal/deep): 0.585 / 0.589 Length to Beam Ratio: 7.69 : 1 'Natural speed' for length: 28.28 kts Power going to wave formation at top speed: 54 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): -3.00 degrees Stern overhang: -2.00 ft / -0.61 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 30.00 %, 32.00 ft / 9.75 m, 29.00 ft / 8.84 m - Forward deck: 37.00 %, 29.00 ft / 8.84 m, 28.00 ft / 8.53 m - Aft deck: 18.00 %, 20.00 ft / 6.10 m, 20.00 ft / 6.10 m - Quarter deck: 15.00 %, 20.00 ft / 6.10 m, 21.00 ft / 6.40 m - Average freeboard: 26.28 ft / 8.01 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 99.3 % - Above water (accommodation/working, high = better): 221.2 % Waterplane Area: 60,003 Square feet or 5,574 Square metres Displacement factor (Displacement / loading): 108 % Structure weight / hull surface area: 210 lbs/sq ft or 1,023 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.96 - Longitudinal: 1.32 - Overall: 1.00 Hull space for machinery, storage, compartmentation is adequate Room for accommodation and workspaces is excellent
Sunday, December 09, 2007
My Ger/BB/1916 concept with 20in guns
When I was working in Minneapolis, in early 2002, I had this concept for a German battleship that I called the Ger/BB/1916, that had 9-20in guns. This version has a fast battleship speed, at least by American standards in 1940. My sketch design had twin funnels and a tower foremast topped by a gun director with a long rangefinder. This is my Springsharp report:
Ger/BB/1916, Germany Battleship laid down 1916 (Engine 1927) Displacement: 70,188 t light; 73,852 t standard; 79,390 t normal; 83,821 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (792.64 ft / 785.00 ft) x 138.00 ft x (38.00 / 39.83 ft) (241.60 m / 239.27 m) x 42.06 m x (11.58 / 12.14 m) Armament: 9 - 20.00" / 508 mm 45.0 cal guns - 4,320.00lbs / 1,959.52kg shells, 90 per gun Breech loading guns in turret on barbette mounts, 1916 Model 3 x Single mounts on centreline ends, majority forward 24 - 5.00" / 127 mm 50.0 cal guns - 66.16lbs / 30.01kg shells, 150 per gun Quick firing guns in turret on barbette mounts, 1916 Model 12 x Twin mounts on sides, evenly spread 4 raised mounts Weight of broadside 40,468 lbs / 18,356 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 20.0" / 508 mm 430.00 ft / 131.06 m 17.00 ft / 5.18 m Ends: Unarmoured Main Belt covers 84 % of normal length - Torpedo Bulkhead: 7.00" / 178 mm 430.00 ft / 131.06 m 38.00 ft / 11.58 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 20.0" / 508 mm 15.0" / 381 mm 20.0" / 508 mm 2nd: 5.00" / 127 mm 3.00" / 76 mm 5.00" / 127 mm - Armoured deck - multiple decks: 8.00" / 203 mm For and Aft decks Forecastle: 6.00" / 152 mm Quarter deck: 8.00" / 203 mm - Conning towers: Forward 20.00" / 508 mm, Aft 0.00" / 0 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 4 shafts, 160,628 shp / 119,828 Kw = 27.00 kts Range 7,500nm at 18.00 kts Bunker at max displacement = 9,970 tons Complement: 2,364 - 3,074 Cost: £10.990 million / $43.961 million Distribution of weights at normal displacement: Armament: 6,867 tons, 8.6 % Armour: 32,576 tons, 41.0 % - Belts: 6,872 tons, 8.7 % - Torpedo bulkhead: 4,232 tons, 5.3 % - Armament: 8,512 tons, 10.7 % - Armour Deck: 12,165 tons, 15.3 % - Conning Tower: 796 tons, 1.0 % Machinery: 5,070 tons, 6.4 % Hull, fittings & equipment: 25,675 tons, 32.3 % Fuel, ammunition & stores: 9,203 tons, 11.6 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 126,859 lbs / 57,542 Kg = 31.7 x 20.0 " / 508 mm shells or 27.7 torpedoes Stability (Unstable if below 1.00): 1.30 Metacentric height 13.0 ft / 4.0 m Roll period: 16.1 seconds Steadiness - As gun platform (Average = 50 %): 59 % - Recoil effect (Restricted arc if above 1.00): 0.44 Seaboat quality (Average = 1.00): 1.18 Hull form characteristics: Hull has a flush deck, an extended bulbous bow and a cruiser stern Block coefficient (normal/deep): 0.675 / 0.680 Length to Beam Ratio: 5.69 : 1 'Natural speed' for length: 28.02 kts Power going to wave formation at top speed: 53 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 8.00 degrees Stern overhang: 3.00 ft / 0.91 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 30.00 %, 33.00 ft / 10.06 m, 26.00 ft / 7.92 m - Forward deck: 25.00 %, 26.00 ft / 7.92 m, 23.00 ft / 7.01 m - Aft deck: 30.00 %, 23.00 ft / 7.01 m, 23.00 ft / 7.01 m - Quarter deck: 15.00 %, 23.00 ft / 7.01 m, 23.00 ft / 7.01 m - Average freeboard: 25.12 ft / 7.66 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 72.0 % - Above water (accommodation/working, high = better): 162.0 % Waterplane Area: 84,899 Square feet or 7,887 Square metres Displacement factor (Displacement / loading): 104 % Structure weight / hull surface area: 256 lbs/sq ft or 1,248 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.95 - Longitudinal: 1.59 - Overall: 1.00 Hull space for machinery, storage, compartmentation is excellent Room for accommodation and workspaces is excellent
Sunday, December 02, 2007
A new version of the "Ger/CB/1905 Flush-Decked" design
I have a new version of my Ger/CB/1905 Flush-Decked Design. This depends on having lightweight machinery to work, as well as oil fuel. Still, the concept seems to work fairly well. The concept dates from the early 1970's and included a pencil sketch. My photo dates from April 2005. This is the Springsharp report:
Ger/CB/1905 Flush Deck, Germany Battlecruiser laid down 1905 (Engine 1921) Displacement: 19,048 t light; 19,917 t standard; 21,432 t normal; 22,644 t full load Dimensions: Length (overall / waterline) x beam x draught (normal/deep) (562.00 ft / 560.00 ft) x 94.00 ft x (25.00 / 26.13 ft) (171.30 m / 170.69 m) x 28.65 m x (7.62 / 7.97 m) Armament: 8 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun Breech loading guns in turret on barbette mounts, 1905 Model 4 x Twin mounts on centreline ends, evenly spread 2 raised mounts - superfiring 12 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun Breech loading guns in casemate mounts, 1905 Model 12 x Single mounts on sides amidships Weight of broadside 8,000 lbs / 3,629 kg Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 10.0" / 254 mm 375.00 ft / 114.30 m 8.00 ft / 2.44 m Ends: Unarmoured Upper: 7.00" / 178 mm 375.00 ft / 114.30 m 8.00 ft / 2.44 m Main Belt covers 103 % of normal length - Torpedo Bulkhead: 3.00" / 76 mm 375.00 ft / 114.30 m 25.00 ft / 7.62 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 9.00" / 229 mm 7.00" / 178 mm 9.00" / 229 mm 2nd: 6.00" / 152 mm 4.00" / 102 mm 6.00" / 152 mm - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm - Conning towers: Forward 9.00" / 229 mm, Aft 0.00" / 0 mm Machinery: Oil fired boilers, steam turbines, Direct drive, 4 shafts, 77,901 shp / 58,114 Kw = 27.00 kts Range 5,600nm at 16.00 kts Bunker at max displacement = 2,727 tons Complement: 885 - 1,151 Cost: £1.755 million / $7.019 million Distribution of weights at normal displacement: Armament: 1,434 tons, 6.7 % Armour: 7,277 tons, 34.0 % - Belts: 2,228 tons, 10.4 % - Torpedo bulkhead: 1,041 tons, 4.9 % - Armament: 1,764 tons, 8.2 % - Armour Deck: 2,094 tons, 9.8 % - Conning Tower: 150 tons, 0.7 % Machinery: 2,683 tons, 12.5 % Hull, fittings & equipment: 7,655 tons, 35.7 % Fuel, ammunition & stores: 2,384 tons, 11.1 % Miscellaneous weights: 0 tons, 0.0 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 34,490 lbs / 15,645 Kg = 39.9 x 12.0 " / 305 mm shells or 6.3 torpedoes Stability (Unstable if below 1.00): 1.29 Metacentric height 7.2 ft / 2.2 m Roll period: 14.7 seconds Steadiness - As gun platform (Average = 50 %): 51 % - Recoil effect (Restricted arc if above 1.00): 0.38 Seaboat quality (Average = 1.00): 1.02 Hull form characteristics: Hull has a flush deck, a normal bow and a cruiser stern Block coefficient (normal/deep): 0.570 / 0.576 Length to Beam Ratio: 5.96 : 1 'Natural speed' for length: 23.66 kts Power going to wave formation at top speed: 58 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 0.00 degrees Stern overhang: 2.00 ft / 0.61 m Freeboard (% = length of deck as a percentage of waterline length): Fore end, Aft end - Forecastle: 20.00 %, 27.00 ft / 8.23 m, 24.00 ft / 7.32 m - Forward deck: 30.00 %, 24.00 ft / 7.32 m, 20.00 ft / 6.10 m - Aft deck: 35.00 %, 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: 20.99 ft / 6.40 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 90.4 % - Above water (accommodation/working, high = better): 164.2 % Waterplane Area: 37,433 Square feet or 3,478 Square metres Displacement factor (Displacement / loading): 110 % Structure weight / hull surface area: 161 lbs/sq ft or 785 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0.94 - Longitudinal: 1.75 - Overall: 1.00 Hull space for machinery, storage, compartmentation is adequate Room for accommodation and workspaces is excellent
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