GB/CB/1915, Great Britain Battlecruiser laid down 1915 (Engine 1919)
Displacement:
41,011 t light; 43,359 t standard; 46,714 t normal; 49,398 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(860.06 ft / 855.00 ft) x 105.00 ft x (29.00 / 30.39 ft)
(262.15 m / 260.60 m) x 32.00 m x (8.84 / 9.26 m)
Armament:
8 - 15.00" / 381 mm 42.0 cal guns - 1,950.00lbs / 884.51kg shells, 150 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
16 - 5.50" / 140 mm 50.0 cal guns - 85.00lbs / 38.56kg 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 16,960 lbs / 7,693 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.00" / 203 mm 600.00 ft / 182.88 m 17.00 ft / 5.18 m
Ends: 4.00" / 102 mm 255.00 ft / 77.72 m 12.00 ft / 3.66 m
Main Belt covers 108 % of normal length
Main belt does not fully cover magazines and engineering spaces
Main Belt inclined 12.00 degrees (positive = in)
- Torpedo Bulkhead - Additional damage containing bulkheads:
2.00" / 51 mm 600.00 ft / 182.88 m 29.00 ft / 8.84 m
Beam between torpedo bulkheads 70.00 ft / 21.34 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.0" / 254 mm 7.00" / 178 mm 10.0" / 254 mm
2nd: 4.00" / 102 mm 2.00" / 51 mm 4.00" / 102 mm
- Armoured deck - multiple decks:
For and Aft decks: 3.00" / 76 mm
Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm
- Conning towers: Forward 10.00" / 254 mm, Aft 8.00" / 203 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 207,000 shp / 154,422 Kw = 32.00 kts
Range 6,500nm at 17.00 kts
Bunker at max displacement = 6,039 tons
Complement:
1,588 - 2,065
Cost:
£5.458 million / $21.830 million
Distribution of weights at normal displacement:
Armament: 2,446 tons, 5.2 %
- Guns: 2,446 tons, 5.2 %
Armour: 12,626 tons, 27.0 %
- Belts: 3,863 tons, 8.3 %
- Torpedo bulkhead: 1,288 tons, 2.8 %
- Armament: 3,209 tons, 6.9 %
- Armour Deck: 3,764 tons, 8.1 %
- Conning Towers: 503 tons, 1.1 %
Machinery: 7,351 tons, 15.7 %
Hull, fittings & equipment: 18,588 tons, 39.8 %
Fuel, ammunition & stores: 5,703 tons, 12.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
73,288 lbs / 33,243 Kg = 43.4 x 15.0 " / 381 mm shells or 9.6 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 7.2 ft / 2.2 m
Roll period: 16.5 seconds
Steadiness - As gun platform (Average = 50 %): 58 %
- Recoil effect (Restricted arc if above 1.00): 0.81
Seaboat quality (Average = 1.00): 1.17
Hull form characteristics:
Hull has low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.628 / 0.634
Length to Beam Ratio: 8.14 : 1
'Natural speed' for length: 29.24 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: 28.00 %, 36.00 ft / 10.97 m, 32.00 ft / 9.75 m
- Forward deck: 30.00 %, 32.00 ft / 9.75 m, 30.00 ft / 9.14 m
- Aft deck: 14.00 %, 30.00 ft / 9.14 m, 30.00 ft / 9.14 m
- Quarter deck: 28.00 %, 20.00 ft / 6.10 m, 22.00 ft / 6.71 m
- Average freeboard: 28.79 ft / 8.77 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 116.9 %
- Above water (accommodation/working, high = better): 248.0 %
Waterplane Area: 67,393 Square feet or 6,261 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 203 lbs/sq ft or 991 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.22
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Sunday, July 27, 2008
My idea of the Hood as it might have been built: GB/CB/1915
The basis for the original Hood concept in 1915 has always interested me. Here is another attempt at such a ship: the GB/CB/1915 design with 8-15in/42 BLR, 16-5.5in QF, an armour basis of 8in and a speed of 32 knots. This is the Springsharp report:
Saturday, July 12, 2008
Another try at a Super Lion (GB/CB/1912)
GB/CB/1912 Super Lion, Great Britain Battlecruiser laid down 1912 (Engine 1918)
Displacement:
41,153 t light; 43,216 t standard; 47,751 t normal; 51,378 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(823.00 ft / 815.00 ft) x 105.00 ft x (31.00 / 32.97 ft)
(250.85 m / 248.41 m) x 32.00 m x (9.45 / 10.05 m)
Armament:
10 - 15.00" / 381 mm 42.0 cal guns - 1,950.00lbs / 884.51kg shells, 90 per gun
Breech loading guns in turret on barbette mounts, 1912 Model
4 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
1 x Twin mount on centreline, aft deck forward
14 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
Quick firing guns in casemate mounts, 1912 Model
14 x Single mounts on sides, evenly spread
14 hull mounts in casemates- Limited use in heavy seas
Weight of broadside 21,101 lbs / 9,571 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.0" / 305 mm 525.00 ft / 160.02 m 9.00 ft / 2.74 m
Ends: 5.00" / 127 mm 290.00 ft / 88.39 m 16.00 ft / 4.88 m
Upper: 8.00" / 203 mm 525.00 ft / 160.02 m 8.00 ft / 2.44 m
Main Belt covers 99 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead - Additional damage containing bulkheads:
1.50" / 38 mm 525.00 ft / 160.02 m 31.00 ft / 9.45 m
Beam between torpedo bulkheads 72.00 ft / 21.95 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.0" / 305 mm 8.00" / 203 mm 12.0" / 305 mm
2nd: 5.00" / 127 mm 5.00" / 127 mm 5.00" / 127 mm
- Armoured deck - multiple decks:
For and Aft decks: 3.00" / 76 mm
Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm
- Conning towers: Forward 12.00" / 305 mm, Aft 8.00" / 203 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 165,755 shp / 123,653 Kw = 30.00 kts
Range 7,500nm at 18.00 kts
Bunker at max displacement = 8,162 tons
Complement:
1,614 - 2,099
Cost:
£3.785 million / $15.142 million
Distribution of weights at normal displacement:
Armament: 2,838 tons, 5.9 %
- Guns: 2,838 tons, 5.9 %
Armour: 14,193 tons, 29.7 %
- Belts: 4,720 tons, 9.9 %
- Torpedo bulkhead: 903 tons, 1.9 %
- Armament: 4,407 tons, 9.2 %
- Armour Deck: 3,596 tons, 7.5 %
- Conning Towers: 567 tons, 1.2 %
Machinery: 5,980 tons, 12.5 %
Hull, fittings & equipment: 18,143 tons, 38.0 %
Fuel, ammunition & stores: 6,598 tons, 13.8 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
77,044 lbs / 34,946 Kg = 45.7 x 15.0 " / 381 mm shells or 10.3 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 6.8 ft / 2.1 m
Roll period: 16.9 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.94
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has low quarterdeck ,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.630 / 0.637
Length to Beam Ratio: 7.76 : 1
'Natural speed' for length: 28.55 kts
Power going to wave formation at top speed: 52 %
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: 25.00 %, 31.00 ft / 9.45 m, 30.00 ft / 9.14 m
- Forward deck: 30.00 %, 30.00 ft / 9.14 m, 29.00 ft / 8.84 m
- Aft deck: 18.00 %, 29.00 ft / 8.84 m, 29.00 ft / 8.84 m
- Quarter deck: 27.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- Average freeboard: 27.34 ft / 8.33 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102.3 %
- Above water (accommodation/working, high = better): 222.6 %
Waterplane Area: 64,359 Square feet or 5,979 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 209 lbs/sq ft or 1,020 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.29
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Good seaboat, rides out heavy weather easily
Sunday, July 06, 2008
My attempt at an Italian armoured cruiser: It/CA/1897
I am interested in the Spanish cruiser Cristobal Colon, lost at the Battle of Santiago Bay in 1898. The Cristobal Colon was Italian-built along the lines of a series of armoured cruisers. My It/CA/1897 has 2-10in/45, 14-6in/50 QF, and 10-3in QF guns. The armour basis is 6in and the deck is 2in. The speed is a modest 20 knots. I struggled with the Springsharp 3.0 Beta 3, as I kept having "NaN" (not a number). The problem was that I had missed some settings. Once I had found all the places, then I had a workable design. I had to greatly increase the displacement and lighten the machinery for the power. This is the Springsharp report:
It/CA/1897, Italy Armoured Cruiser laid down 1897 (Engine 1904)
Displacement:
8,028 t light; 8,405 t standard; 9,073 t normal; 9,608 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(354.00 ft / 345.00 ft) x 60.00 ft x (23.00 / 24.16 ft)
(107.90 m / 105.16 m) x 18.29 m x (7.01 / 7.36 m)
Armament:
2 - 10.00" / 254 mm 45.0 cal guns - 504.26lbs / 228.73kg shells, 90 per gun
Breech loading guns in turret on barbette mounts, 1897 Model
2 x Single mounts on centreline ends, evenly spread
14 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
Quick firing guns in casemate mounts, 1897 Model
10 x Single mounts on sides, evenly spread
10 hull mounts in casemates- Limited use in all but light seas
4 x Single mounts layout not set
10 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 150 per gun
Quick firing guns in deck mounts, 1897 Model
10 x Single mounts on sides, evenly spread
10 raised mounts
Weight of broadside 2,745 lbs / 1,245 kg
Main Torpedoes
4 - 18.0" / 457 mm, 19.00 ft / 5.79 m torpedoes - 0.618 t each, 2.471 t total
In 4 sets of deck mounted carriage/fixed tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 200.00 ft / 60.96 m 25.00 ft / 7.62 m
Ends: 4.50" / 114 mm 145.00 ft / 44.20 m 9.00 ft / 2.74 m
Main Belt covers 89 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead - Additional damage containing bulkheads:
1.00" / 25 mm 200.00 ft / 60.96 m 23.00 ft / 7.01 m
Beam between torpedo bulkheads 43.00 ft / 13.11 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 4.00" / 102 mm 6.00" / 152 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
3rd: 1.00" / 25 mm - -
- Protected deck - single deck:
For and Aft decks: 2.00" / 51 mm
Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm
- Conning towers: Forward 6.00" / 152 mm, Aft 0.00" / 0 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 17,193 ihp / 12,826 Kw = 20.00 kts
Range 3,500nm at 12.00 kts
Bunker at max displacement = 1,203 tons (100% coal)
Complement:
464 - 604
Cost:
£0.820 million / $3.280 million
Distribution of weights at normal displacement:
Armament: 612 tons, 6.7 %
- Guns: 609 tons, 6.7 %
- Weapons: 3 tons, 0.0 %
Armour: 2,895 tons, 31.9 %
- Belts: 1,602 tons, 17.7 %
- Torpedo bulkhead: 170 tons, 1.9 %
- Armament: 466 tons, 5.1 %
- Armour Deck: 600 tons, 6.6 %
- Conning Tower: 56 tons, 0.6 %
Machinery: 2,528 tons, 27.9 %
Hull, fittings & equipment: 1,993 tons, 22.0 %
Fuel, ammunition & stores: 1,045 tons, 11.5 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,570 lbs / 3,887 Kg = 17.1 x 10.0 " / 254 mm shells or 3.0 torpedoes
Stability (Unstable if below 1.00): 1.48
Metacentric height 4.6 ft / 1.4 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.33
Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.667 / 0.672
Length to Beam Ratio: 5.75 : 1
'Natural speed' for length: 18.57 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 53
Bow angle (Positive = bow angles forward): -7.00 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 %, 19.00 ft / 5.79 m, 18.00 ft / 5.49 m
- Forward deck: 30.00 %, 18.00 ft / 5.49 m, 17.00 ft / 5.18 m
- Aft deck: 30.00 %, 17.00 ft / 5.18 m, 17.00 ft / 5.18 m
- Quarter deck: 20.00 %, 17.00 ft / 5.18 m, 18.00 ft / 5.49 m
- Average freeboard: 17.53 ft / 5.34 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 153.3 %
- Above water (accommodation/working, high = better): 113.2 %
Waterplane Area: 16,105 Square feet or 1,496 Square metres
Displacement factor (Displacement / loading): 93 %
Structure weight / hull surface area: 96 lbs/sq ft or 469 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.63
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily