środa, 29 sierpnia 2012

Flota japońska w XIX w. - cz. VI - 20.09.2011

W kolejnym poście prezentuję dwie jednostki: mały drewniany slup (czy jak kto chce - bo klasyfikacja jest tu sprawą mocno dyskusyjną - nieopancerzony krążownik albo korwetę) oraz eksperymentalną kanonierkę opancerzoną:

Yubari, japanese sloop laid down 1871

Displacement:
    734 t light; 782 t standard; 924 t normal; 1 038 t full load

Dimensions: Length overall / water x beam x draught
    163,25 ft / 163,25 ft x 30,97 ft x 12,40 ft (normal load)
    49,76 m / 49,76 m x 9,44 m  x 3,78 m

Armament:
      2 - 7,01" / 178 mm guns in single mounts, 123,04lbs / 55,81kg shells, 1871 Model
      Muzzle loading guns in broadside mounts
      on side, all forward
      4 - 4,72" / 120 mm guns in single mounts, 37,70lbs / 17,10kg shells, 1871 Model
      Muzzle loading guns in broadside mounts
      on side, all amidships
    Weight of broadside 397 lbs / 180 kg
    Shells per gun, main battery: 125

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 1 136 ihp / 847 Kw = 13,00 kts
    Range 3 200nm at 8,00 kts
    Bunker at max displacement = 256 tons (100% coal)

Complement:
    161

Cost:
    £0,103 million / $0,411 million

Distribution of weights at normal displacement:
    Armament: 50 tons, 5,4%
    Machinery: 252 tons, 27,3%
    Hull, fittings & equipment: 358 tons, 38,7%
    Fuel, ammunition & stores: 190 tons, 20,6%
    Miscellaneous weights: 74 tons, 8,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      392 lbs / 178 Kg = 3,2 x 7,0 " / 178 mm shells or 0,2 torpedoes
    Stability (Unstable if below 1.00): 1,33
    Metacentric height 1,4 ft / 0,4 m
    Roll period: 10,9 seconds
    Steadiness    - As gun platform (Average = 50 %): 93 %
            - Recoil effect (Restricted arc if above 1.00): 0,43
    Seaboat quality  (Average = 1.00): 1,87

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,516
    Length to Beam Ratio: 5,27 : 1
    'Natural speed' for length: 12,78 kts
    Power going to wave formation at top speed: 51 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    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:        10,40 ft / 3,17 m
       - Forecastle (20%):    9,35 ft / 2,85 m
       - Mid (50%):        9,35 ft / 2,85 m
       - Quarterdeck (15%):    9,35 ft / 2,85 m
       - Stern:        9,81 ft / 2,99 m
       - Average freeboard:    9,47 ft / 2,89 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 137,7%
        - Above water (accommodation/working, high = better): 70,7%
    Waterplane Area: 3 296 Square feet or 306 Square metres
    Displacement factor (Displacement / loading): 91%
    Structure weight / hull surface area: 64 lbs/sq ft or 315 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,86
        - Longitudinal: 3,96
        - Overall: 1,00
    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
    Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Okręty w typie:
Yubari (1871)
Chitose (1871)


Omura, japanese armoured gunboat laid down 1872

Displacement:
    830 t light; 860 t standard; 940 t normal; 1 003 t full load

Dimensions: Length overall / water x beam x draught
    161,45 ft / 161,45 ft x 34,65 ft x 11,22 ft (normal load)
    49,21 m / 49,21 m x 10,56 m  x 3,42 m

Armament:
      1 - 7,99" / 203 mm guns in single mounts, 186,33lbs / 84,52kg shells, 1872 Model
      Muzzle loading gun in a deck mount with hoist
      on centreline forward
      1 - 3,74" / 95,0 mm guns in single mounts, 19,10lbs / 8,66kg shells, 1872 Model
      Breech loading gun in a deck mount with hoist
      on centreline aft
    Weight of broadside 205 lbs / 93 kg
    Shells per gun, main battery: 95

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    3,94" / 100 mm      76,71 ft / 23,38 m    6,82 ft / 2,08 m
    Ends:    2,24" / 57 mm      22,24 ft / 6,78 m    6,27 ft / 1,91 m
      62,50 ft / 19,05 m Unarmoured ends
      Main Belt covers 73% of normal length
      Main belt does not fully cover magazines and engineering spaces

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    1,18" / 30 mm          -                  -
    2nd:    1,18" / 30 mm          -                  -

   - Armour deck: 0,98" / 25 mm, Conning tower: 3,35" / 85 mm

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 850 ihp / 634 Kw = 12,00 kts
    Range 2 450nm at 7,00 kts
    Bunker at max displacement = 143 tons (100% coal)

Complement:
    84 - 110

Cost:
    £0,079 million / $0,315 million

Distribution of weights at normal displacement:
    Armament: 26 tons, 2,7%
    Armour: 196 tons, 20,9%
       - Belts: 114 tons, 12,2%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 8 tons, 0,9%
       - Armour Deck: 67 tons, 7,1%
       - Conning Tower: 7 tons, 0,7%
    Machinery: 200 tons, 21,3%
    Hull, fittings & equipment: 408 tons, 43,4%
    Fuel, ammunition & stores: 109 tons, 11,6%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      869 lbs / 394 Kg = 4,7 x 8,0 " / 203 mm shells or 0,4 torpedoes
    Stability (Unstable if below 1.00): 1,31
    Metacentric height 1,6 ft / 0,5 m
    Roll period: 11,3 seconds
    Steadiness    - As gun platform (Average = 50 %): 95 %
            - Recoil effect (Restricted arc if above 1.00): 0,31
    Seaboat quality  (Average = 1.00): 1,90

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,524
    Length to Beam Ratio: 4,66 : 1
    'Natural speed' for length: 12,71 kts
    Power going to wave formation at top speed: 49 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -10,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        8,89 ft / 2,71 m
       - Forecastle (20%):    8,89 ft / 2,71 m
       - Mid (50%):        8,89 ft / 2,71 m
       - Quarterdeck (15%):    8,89 ft / 2,71 m
       - Stern:        8,89 ft / 2,71 m
       - Average freeboard:    8,89 ft / 2,71 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 90,0%
        - Above water (accommodation/working, high = better): 74,2%
    Waterplane Area: 3 678 Square feet or 342 Square metres
    Displacement factor (Displacement / loading): 117%
    Structure weight / hull surface area: 73 lbs/sq ft or 356 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,86
        - Longitudinal: 3,79
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is adequate
    Room for accommodation and workspaces is cramped
    Ship has slow, easy roll, a good, steady gun platform
    Excellent seaboat, comfortable, can fire her guns in the heaviest weather

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