2nd Class Cruiser Size Comparison.
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Cruisers2.png)
Top to bottom: Naniwa, Matsushima, Hashidate, Yoshino, Takasago, Chitose, Tone, Mirai.
Naniwa, Japan Cruiser Class 2 laid down 1884
Redesignated as Coast Defense Ship Class 2 as of 1/1/1912.
(http://upload.wikimedia.org/wikipedia/commons/6/61/HIJMS_Naniwa.jpg)
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Naniwa.png)
Ships: Naniwa, Takachiho
Displacement:
3,428 t light; 3,622 t standard; 3,964 t normal; 4,237 t full load
Dimensions: Length overall / water x beam x draught
301.84 ft / 301.84 ft x 45.93 ft x 20.01 ft (normal load)
92.00 m / 92.00 m x 14.00 m x 6.10 m
Armament:
2 - 10.24" / 260 mm guns in single mounts, 488.01lbs / 221.36kg shells, 1884 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
6 - 6.00" / 152 mm guns in single mounts, 98.28lbs / 44.58kg shells, 1884 Model
Breech loading guns in casemate mounts
on side, all amidships
6 guns in hull casemates - Limited use in any sea
2 - 2.24" / 57.0 mm guns in single mounts, 5.14lbs / 2.33kg shells, 1884 Model
Quick firing guns in deck mounts
on side, evenly spread
2 guns in hull casemates - Limited use in any sea
40 - 1.00" / 25.4 mm guns (10x4 guns), 0.46lbs / 0.21kg shells, 1884 Model
Machine guns in deck mounts
on side, evenly spread
40 - 0.45" / 11.4 mm guns (4x10 guns), 0.04lbs / 0.02kg shells, 1884 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 1,596 lbs / 724 kg
Shells per gun, main battery: 120
4 - 15.0" / 380 mm submerged torpedo tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.46" / 37 mm - -
2nd: 1.18" / 30 mm - 0.79" / 20 mm
- Armour deck: 1.97" / 50 mm, Conning tower: 1.46" / 37 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 3 shafts, 7,755 ihp / 5,785 Kw = 18.50 kts
Range 3,000nm at 10.00 kts
Bunker at max displacement = 616 tons (100% coal)
Complement:
249 - 324
Cost:
£0.490 million / $1.961 million
Distribution of weights at normal displacement:
Armament: 199 tons, 5.0 %
Armour: 389 tons, 9.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 44 tons, 1.1 %
- Armour Deck: 336 tons, 8.5 %
- Conning Tower: 8 tons, 0.2 %
Machinery: 1,448 tons, 36.5 %
Hull, fittings & equipment: 1,342 tons, 33.8 %
Fuel, ammunition & stores: 536 tons, 13.5 %
Miscellaneous weights: 50 tons, 1.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,104 lbs / 501 Kg = 2.3 x 10.2 " / 260 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 2.2 ft / 0.7 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.54
Seaboat quality (Average = 1.00): 1.24
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 6.57 : 1
'Natural speed' for length: 17.37 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 81
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 9.84 ft / 3.00 m
- Forecastle (20 %): 9.84 ft / 3.00 m
- Mid (50 %): 9.84 ft / 3.00 m
- Quarterdeck (7 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 9.84 ft / 3.00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 172.2 %
- Above water (accommodation/working, high = better): 69.5 %
Waterplane Area: 9,237 Square feet or 858 Square metres
Displacement factor (Displacement / loading): 78 %
Structure weight / hull surface area: 93 lbs/sq ft or 453 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 2.21
- Overall: 1.02
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
1 inch MG => Nordenfeld gun
0.45 inch MG => 10 barreled Gatling MG
Matsushima A, Japan Cruiser Class 2 laid down 1888
Redesignated as Coast Defense Ship Class 2 as of 1/1/1912.
(http://upload.wikimedia.org/wikipedia/commons/d/d6/Hashidate.jpg)
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Matsushima1.png)
Ships: Matsushima
Displacement:
3,839 t light; 4,050 t standard; 4,371 t normal; 4,629 t full load
Dimensions: Length overall / water x beam x draught
301.21 ft / 301.21 ft x 51.18 ft x 19.85 ft (normal load)
91.81 m / 91.81 m x 15.60 m x 6.05 m
Armament:
1 - 12.60" / 320 mm guns in single mounts, 969.82lbs / 439.90kg shells, 1888 Model
Breech loading gun in a turret (on a barbette)
on centreline aft
12 - 4.72" / 120 mm guns in single mounts, 51.14lbs / 23.20kg shells, 1888 Model
Breech loading guns in casemate mounts
on side, all amidships
16 - 2.24" / 57.0 mm guns in single mounts, 5.48lbs / 2.49kg shells, 1888 Model
Quick firing guns in deck mounts
on side, evenly spread
6 - 1.30" / 33.0 mm guns in single mounts, 1.06lbs / 0.48kg shells, 1888 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 1,678 lbs / 761 kg
Shells per gun, main battery: 120
4 - 14.2" / 360 mm submerged torpedo tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.8" / 300 mm 3.94" / 100 mm 3.94" / 100 mm
2nd: 3.94" / 100 mm - 1.97" / 50 mm
- Armour deck: 1.97" / 50 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 3 shafts, 5,134 ihp / 3,830 Kw = 16.50 kts
Range 3,000nm at 10.00 kts
Bunker at max displacement = 579 tons (100% coal)
Complement:
268 - 349
Cost:
£0.450 million / $1.800 million
Distribution of weights at normal displacement:
Armament: 210 tons, 4.8 %
Armour: 617 tons, 14.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 243 tons, 5.6 %
- Armour Deck: 374 tons, 8.6 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 996 tons, 22.8 %
Hull, fittings & equipment: 1,916 tons, 43.8 %
Fuel, ammunition & stores: 532 tons, 12.2 %
Miscellaneous weights: 100 tons, 2.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,966 lbs / 1,345 Kg = 3.1 x 12.6 " / 320 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.6 ft / 0.8 m
Roll period: 13.2 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.59
Seaboat quality (Average = 1.00): 1.81
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 5.89 : 1
'Natural speed' for length: 17.36 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 55
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13.12 ft / 4.00 m
- Forecastle (20 %): 13.12 ft / 4.00 m
- Mid (50 %): 13.12 ft / 4.00 m
- Quarterdeck (7 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 13.12 ft / 4.00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.9 %
- Above water (accommodation/working, high = better): 95.8 %
Waterplane Area: 10,272 Square feet or 954 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 119 lbs/sq ft or 581 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.05
- Longitudinal: 3.40
- Overall: 1.18
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Matsushima B, Japan Cruiser Class 2 laid down 1888
Redesignated as Coast Defense Ship Class 2 as of 1/1/1912.
(http://upload.wikimedia.org/wikipedia/commons/9/98/Itsukushima.jpg)
Itsukushima
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Hashidate.png)
Hashidate
Ships: Itsukushima, Hashidate
Displacement:
3,846 t light; 4,050 t standard; 4,371 t normal; 4,629 t full load
Dimensions: Length overall / water x beam x draught
301.21 ft / 301.21 ft x 51.18 ft x 19.85 ft (normal load)
91.81 m / 91.81 m x 15.60 m x 6.05 m
Armament:
1 - 12.60" / 320 mm guns in single mounts, 969.82lbs / 439.90kg shells, 1888 Model
Breech loading gun in a turret (on a barbette)
on centreline aft
11 - 4.72" / 120 mm guns in single mounts, 51.14lbs / 23.20kg shells, 1888 Model
Breech loading guns in casemate mounts
on side, all amidships
5 - 2.24" / 57.0 mm guns in single mounts, 5.48lbs / 2.49kg shells, 1888 Model
Quick firing guns in deck mounts
on side, evenly spread
11 - 1.85" / 47.0 mm guns in single mounts, 3.07lbs / 1.39kg shells, 1888 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 1,594 lbs / 723 kg
Shells per gun, main battery: 120
4 - 14.2" / 360 mm submerged torpedo tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.8" / 300 mm 3.94" / 100 mm 3.94" / 100 mm
2nd: 3.94" / 100 mm - 1.97" / 50 mm
- Armour deck: 1.97" / 50 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 3 shafts, 5,134 ihp / 3,830 Kw = 16.50 kts
Range 3,000nm at 10.00 kts
Bunker at max displacement = 579 tons (100% coal)
Complement:
268 - 349
Cost:
£0.441 million / $1.766 million
Distribution of weights at normal displacement:
Armament: 199 tons, 4.6 %
Armour: 606 tons, 13.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 232 tons, 5.3 %
- Armour Deck: 374 tons, 8.6 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 997 tons, 22.8 %
Hull, fittings & equipment: 1,944 tons, 44.5 %
Fuel, ammunition & stores: 525 tons, 12.0 %
Miscellaneous weights: 100 tons, 2.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,056 lbs / 1,386 Kg = 3.2 x 12.6 " / 320 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.6 ft / 0.8 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.81
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 5.89 : 1
'Natural speed' for length: 17.36 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 55
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13.12 ft / 4.00 m
- Forecastle (20 %): 13.12 ft / 4.00 m
- Mid (50 %): 13.12 ft / 4.00 m
- Quarterdeck (7 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 13.12 ft / 4.00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 120.0 %
- Above water (accommodation/working, high = better): 95.8 %
Waterplane Area: 10,272 Square feet or 954 Square metres
Displacement factor (Displacement / loading): 102 %
Structure weight / hull surface area: 121 lbs/sq ft or 590 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.07
- Longitudinal: 3.48
- Overall: 1.21
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Yoshino , Japan Cruiser Class 2 laid down 1892
Redesignated as Coast Defense Ship Class 2 as of 1/1/1917.
(http://upload.wikimedia.org/wikipedia/commons/5/5e/Yoshino.jpg)
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Yoshino.png)
Displacement:
3,753 t light; 3,907 t standard; 4,198 t normal; 4,430 t full load
Dimensions: Length overall / water x beam x draught
357.61 ft / 357.61 ft x 46.49 ft x 16.99 ft (normal load)
109.00 m / 109.00 m x 14.17 m x 5.18 m
Armament:
4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1892 Model
Breech loading guns in deck mounts with hoists
on centreline, all aft
8 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1892 Model
Breech loading guns in casemate mounts
on side, all amidships
22 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1892 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 923 lbs / 419 kg
Shells per gun, main battery: 120
5 - 14.2" / 360 mm submerged torpedo tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.53" / 115 mm - -
2nd: 1.18" / 30 mm - 0.79" / 20 mm
- Armour deck: 1.77" / 45 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 10,579 ihp / 7,892 Kw = 20.50 kts
Range 3,000nm at 10.00 kts
Bunker at max displacement = 524 tons (100% coal)
Complement:
259 - 338
Cost:
£0.484 million / $1.935 million
Distribution of weights at normal displacement:
Armament: 115 tons, 2.7 %
Armour: 459 tons, 10.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 89 tons, 2.1 %
- Armour Deck: 370 tons, 8.8 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,825 tons, 43.5 %
Hull, fittings & equipment: 1,304 tons, 31.1 %
Fuel, ammunition & stores: 445 tons, 10.6 %
Miscellaneous weights: 50 tons, 1.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,289 lbs / 585 Kg = 11.9 x 6.0 " / 152 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.3 ft / 0.7 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.34
Seaboat quality (Average = 1.00): 1.15
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.520
Length to Beam Ratio: 7.69 : 1
'Natural speed' for length: 18.91 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 87
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 9.84 ft / 3.00 m
- Forecastle (20 %): 9.84 ft / 3.00 m
- Mid (50 %): 9.84 ft / 3.00 m
- Quarterdeck (7 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 9.84 ft / 3.00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 177.8 %
- Above water (accommodation/working, high = better): 81.7 %
Waterplane Area: 11,282 Square feet or 1,048 Square metres
Displacement factor (Displacement / loading): 81 %
Structure weight / hull surface area: 78 lbs/sq ft or 382 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.23
- Overall: 1.02
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Takasago, Japan Cruiser Class 2 laid down 1896
Redesignated as Coast Defense Ship Class 2 as of 1/1/1917.
(http://upload.wikimedia.org/wikipedia/commons/f/f7/Japanese_cruiser_Takasago.jpg)
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Takasago.png)
Displacement:
4,094 t light; 4,277 t standard; 4,565 t normal; 4,796 t full load
Dimensions: Length overall / water x beam x draught
387.80 ft / 387.80 ft x 48.49 ft x 16.99 ft (normal load)
118.20 m / 118.20 m x 14.78 m x 5.18 m
Armament:
2 - 8.00" / 203 mm guns in single mounts, 256.00lbs / 116.12kg shells, 1896 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
10 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1896 Model
Breech loading guns in casemate mounts
on side, all amidships
12 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1896 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 1,201 lbs / 545 kg
Shells per gun, main battery: 120
5 - 17.7" / 450 mm submerged torpedo tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.53" / 115 mm 2.64" / 67 mm -
2nd: 2.64" / 67 mm - -
- Armour deck: 2.48" / 63 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 10,741 ihp / 8,012 Kw = 20.50 kts
Range 3,000nm at 10.00 kts
Bunker at max displacement = 520 tons (100% coal)
Complement:
277 - 361
Cost:
£0.516 million / $2.064 million
Distribution of weights at normal displacement:
Armament: 150 tons, 3.3 %
Armour: 690 tons, 15.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 115 tons, 2.5 %
- Armour Deck: 575 tons, 12.6 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,761 tons, 38.6 %
Hull, fittings & equipment: 1,444 tons, 31.6 %
Fuel, ammunition & stores: 471 tons, 10.3 %
Miscellaneous weights: 50 tons, 1.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,458 lbs / 661 Kg = 5.7 x 8.0 " / 203 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 2.2 ft / 0.7 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.30
Seaboat quality (Average = 1.00): 1.05
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 8.00 : 1
'Natural speed' for length: 19.69 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 95
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 8.20 ft / 2.50 m
- Forecastle (20 %): 8.20 ft / 2.50 m
- Mid (50 %): 8.20 ft / 2.50 m
- Quarterdeck (7 %): 8.20 ft / 2.50 m
- Stern: 8.20 ft / 2.50 m
- Average freeboard: 8.20 ft / 2.50 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 166.6 %
- Above water (accommodation/working, high = better): 70.7 %
Waterplane Area: 12,529 Square feet or 1,164 Square metres
Displacement factor (Displacement / loading): 83 %
Structure weight / hull surface area: 82 lbs/sq ft or 400 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.07
- Longitudinal: 1.01
- Overall: 1.02
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Chitose, Japan Cruiser Class 2 laid down 1897
Redesignated as Coast Defense Ship Class 2 as of 1/1/1917.
(http://upload.wikimedia.org/wikipedia/commons/0/08/IJN_Chitose.jpg)
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Chitose.png)
Ships: Kasagi, Chitose
Displacement:
4,495 t light; 4,687 t standard; 4,987 t normal; 5,227 t full load
Dimensions: Length overall / water x beam x draught
387.14 ft / 387.14 ft x 49.21 ft x 17.62 ft (normal load)
118.00 m / 118.00 m x 15.00 m x 5.37 m
Armament:
2 - 8.00" / 203 mm guns in single mounts, 256.00lbs / 116.12kg shells, 1897 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
10 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1897 Model
Breech loading guns in casemate mounts
on side, all amidships
12 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1897 Model
Quick firing guns in deck mounts
on side, evenly spread
6 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1897 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 1,220 lbs / 553 kg
Shells per gun, main battery: 120
4 - 17.7" / 450 mm submerged torpedo tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.53" / 115 mm 2.64" / 67 mm -
2nd: 2.64" / 67 mm - -
- Armour deck: 2.48" / 63 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 12,555 ihp / 9,366 Kw = 21.00 kts
Range 3,000nm at 10.00 kts
Bunker at max displacement = 539 tons (100% coal)
Complement:
296 - 385
Cost:
£0.573 million / $2.294 million
Distribution of weights at normal displacement:
Armament: 153 tons, 3.1 %
Armour: 708 tons, 14.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 115 tons, 2.3 %
- Armour Deck: 593 tons, 11.9 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 2,057 tons, 41.2 %
Hull, fittings & equipment: 1,527 tons, 30.6 %
Fuel, ammunition & stores: 492 tons, 9.9 %
Miscellaneous weights: 50 tons, 1.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,662 lbs / 754 Kg = 6.5 x 8.0 " / 203 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 2.6 ft / 0.8 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.31
Seaboat quality (Average = 1.00): 1.15
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.520
Length to Beam Ratio: 7.87 : 1
'Natural speed' for length: 19.68 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 87
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 9.84 ft / 3.00 m
- Forecastle (20 %): 9.84 ft / 3.00 m
- Mid (50 %): 9.84 ft / 3.00 m
- Quarterdeck (7 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 9.84 ft / 3.00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 170.3 %
- Above water (accommodation/working, high = better): 81.9 %
Waterplane Area: 12,929 Square feet or 1,201 Square metres
Displacement factor (Displacement / loading): 82 %
Structure weight / hull surface area: 81 lbs/sq ft or 397 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.04
- Longitudinal: 1.18
- Overall: 1.05
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Tone, Japan Cruiser Class 2 laid down 1905
(http://upload.wikimedia.org/wikipedia/commons/3/37/IJN_Tone_in_1918.jpg)
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Tone.png)
Displacement:
3,526 t light; 3,672 t standard; 4,216 t normal; 4,652 t full load
Dimensions: Length overall / water x beam x draught
385.60 ft / 373.36 ft x 47.24 ft x 16.73 ft (normal load)
117.53 m / 113.80 m x 14.40 m x 5.10 m
Armament:
2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1905 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
10 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1905 Model
Breech loading guns in casemate mounts
on side, all amidships
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1905 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 797 lbs / 362 kg
Shells per gun, main battery: 120
3 - 17.7" / 450 mm submerged torpedo tubes
Armour:
- Armour deck: 1.57" / 40 mm, Conning tower: 3.94" / 100 mm
Machinery:
Coal and oil fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 13,045 ihp / 9,731 Kw = 21.75 kts
Range 7,500nm at 10.00 kts
Bunker at max displacement = 980 tons (90% coal)
Complement:
261 - 340
Cost:
£0.463 million / $1.850 million
Distribution of weights at normal displacement:
Armament: 100 tons, 2.4 %
Armour: 365 tons, 8.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 342 tons, 8.1 %
- Conning Tower: 22 tons, 0.5 %
Machinery: 1,825 tons, 43.3 %
Hull, fittings & equipment: 1,186 tons, 28.1 %
Fuel, ammunition & stores: 691 tons, 16.4 %
Miscellaneous weights: 50 tons, 1.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,534 lbs / 696 Kg = 14.2 x 6.0 " / 152 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.37
Metacentric height 2.8 ft / 0.9 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.16
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 7.90 : 1
'Natural speed' for length: 19.32 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 87
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 9.84 ft / 3.00 m
- Forecastle (20 %): 9.84 ft / 3.00 m
- Mid (50 %): 9.84 ft / 3.00 m
- Quarterdeck (7 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 9.84 ft / 3.00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 169.4 %
- Above water (accommodation/working, high = better): 84.4 %
Waterplane Area: 11,752 Square feet or 1,092 Square metres
Displacement factor (Displacement / loading): 85 %
Structure weight / hull surface area: 69 lbs/sq ft or 337 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.19
- Overall: 1.02
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Mirai, Japan 2nd Class Cruiser laid down 1912
(http://i249.photobucket.com/albums/gg240/WvRooijen/Navalism/IJN/Mirai.png)
Ships: Mirai, Kibou, Seigi.
Displacement:
4,685 t light; 4,880 t standard; 5,437 t normal; 5,881 t full load
Dimensions: Length overall / water x beam x draught
481.58 ft / 465.00 ft x 46.50 ft x 16.00 ft (normal load)
146.79 m / 141.73 m x 14.17 m x 4.88 m
Armament:
4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model
Breech loading guns in deck mounts with hoists
on side ends, evenly spread
6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
Quick firing guns in deck mounts with hoists
on side, all amidships
Weight of broadside 945 lbs / 429 kg
Shells per gun, main battery: 150
4 - 17.7" / 449.58 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 331.00 ft / 100.89 m 8.50 ft / 2.59 m
Ends: 1.50" / 38 mm 134.00 ft / 40.84 m 8.50 ft / 2.59 m
Main Belt covers 110% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 0.50" / 13 mm 1.00" / 25 mm
2nd: 1.00" / 25 mm 0.50" / 13 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm 0.50" / 13 mm 1.00" / 25 mm
- Armour deck: 1.00" / 25 mm, Conning tower: 4.00" / 102 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 36,531 shp / 27,252 Kw = 27.70 kts
Range 10,000nm at 10.00 kts
Bunker at max displacement = 1,001 tons
Complement:
316 - 411
Cost:
£0.467 million / $1.868 million
Distribution of weights at normal displacement:
Armament: 118 tons, 2.2%
Armour: 753 tons, 13.9%
- Belts: 411 tons, 7.6%
- Torpedo bulkhead: 0 tons, 0.0%
- Armament: 37 tons, 0.7%
- Armour Deck: 279 tons, 5.1%
- Conning Tower: 27 tons, 0.5%
Machinery: 1,457 tons, 26.8%
Hull, fittings & equipment: 2,087 tons, 38.4%
Fuel, ammunition & stores: 752 tons, 13.8%
Miscellaneous weights: 270 tons, 5.0%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,825 lbs / 2,642 Kg = 53.9 x 6.0 " / 152 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 2.1 ft / 0.6 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.37
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 21.56 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.25 ft / 7.70 m
- Forecastle (15%): 17.50 ft / 5.33 m
- Mid (50%): 17.50 ft / 5.33 m
- Quarterdeck (15%): 17.50 ft / 5.33 m
- Stern: 17.50 ft / 5.33 m
- Average freeboard: 17.97 ft / 5.48 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 109.4%
- Above water (accommodation/working, high = better): 144.8%
Waterplane Area: 15,090 Square feet or 1,402 Square metres
Displacement factor (Displacement / loading): 111%
Structure weight / hull surface area: 79 lbs/sq ft or 387 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.85
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
100 tons - FC
25 tons - radio