POW General Artigas - 05.07.2012

Pora odetchnąć od tych monstrualnych projektów;) Dla odmiany proponuję coś skromnego – mały pancernik dla floty Urugwaju. Kraj ten pod koniec XIX w. praktycznie nie miał żadnych liczących się jednostek bojowych, za to dwóch wielkich sąsiadów ze znacznymi siłami morskimi. Stąd moja propozycja dość taniego okrętu mogącego służyć do ewentualnej obrony wybrzeża. Wielkość i kaliber artylerii jednostki (brytyjskie 9,2 calówki Mk X mogące strzelać 172 kg pociskami 3-4 razy na minutę!) zostały dobrane tak, by nie była ona słabsza od najsilniejszych ówcześnie pancerników flot Argentyny i Brazylii.   

 

General Artigas, uruguayan coastal battleship laid down 1900 (Engine 1901)

Displacement:
    3 686 t light; 3 815 t standard; 4 062 t normal; 4 259 t full load

Dimensions: Length overall / water x beam x draught
    299,28 ft / 299,28 ft x 48,43 ft x 17,45 ft (normal load)
    91,22 m / 91,22 m x 14,76 m  x 5,32 m

Armament:
      2 - 9,21" / 234 mm guns in single mounts, 390,95lbs / 177,33kg shells, 1900 Model
      Breech loading guns in turrets (on barbettes)
      on centreline ends, evenly spread
      4 - 4,72" / 120 mm guns in single mounts, 52,72lbs / 23,91kg shells, 1900 Model
      Quick firing guns in turrets (on barbettes)
      on side, all amidships
      6 - 2,99" / 76,0 mm guns in single mounts, 13,39lbs / 6,07kg shells, 1900 Model
      Quick firing guns in deck mounts
      on side, evenly spread
    Weight of broadside 1 073 lbs / 487 kg
    Shells per gun, main battery: 75

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    7,09" / 180 mm    198,65 ft / 60,55 m    10,01 ft / 3,05 m
    Ends:    2,17" / 55 mm      83,73 ft / 25,52 m    7,38 ft / 2,25 m
      16,90 ft / 5,15 m Unarmoured ends
    Upper:    4,92" / 125 mm      98,59 ft / 30,05 m    6,30 ft / 1,92 m
      Main Belt covers 102% of normal length

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    7,87" / 200 mm    3,94" / 100 mm        7,87" / 200 mm
    2nd:    3,94" / 100 mm    1,97" / 50 mm        3,94" / 100 mm

   - Armour deck: 1,57" / 40 mm, Conning tower: 6,89" / 175 mm

Machinery:
    Coal fired boilers, complex reciprocating steam engines,
    Direct drive, 2 shafts, 5 506 ihp / 4 107 Kw = 17,00 kts
    Range 3 050nm at 10,00 kts
    Bunker at max displacement = 444 tons (100% coal)

Complement:
    253 - 330

Cost:
    £0,360 million / $1,438 million

Distribution of weights at normal displacement:
    Armament: 134 tons, 3,3%
    Armour: 1 430 tons, 35,2%
       - Belts: 826 tons, 20,3%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 268 tons, 6,6%
       - Armour Deck: 298 tons, 7,3%
       - Conning Tower: 38 tons, 0,9%
    Machinery: 842 tons, 20,7%
    Hull, fittings & equipment: 1 280 tons, 31,5%
    Fuel, ammunition & stores: 376 tons, 9,2%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      4 512 lbs / 2 046 Kg = 11,5 x 9,2 " / 234 mm shells or 1,1 torpedoes
    Stability (Unstable if below 1.00): 1,20
    Metacentric height 2,4 ft / 0,7 m
    Roll period: 13,2 seconds
    Steadiness    - As gun platform (Average = 50 %): 61 %
            - Recoil effect (Restricted arc if above 1.00): 0,40
    Seaboat quality  (Average = 1.00): 1,48

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,562
    Length to Beam Ratio: 6,18 : 1
    'Natural speed' for length: 17,30 kts
    Power going to wave formation at top speed: 49 %
    Trim (Max stability = 0, Max steadiness = 100): 41
    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:        15,03 ft / 4,58 m
       - Forecastle (17%):    12,04 ft / 3,67 m
       - Mid (50%):        12,04 ft / 3,67 m
       - Quarterdeck (16%):    12,04 ft / 3,67 m
       - Stern:        12,50 ft / 3,81 m
       - Average freeboard:    12,28 ft / 3,74 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 92,0%
        - Above water (accommodation/working, high = better): 92,7%
    Waterplane Area: 10 229 Square feet or 950 Square metres
    Displacement factor (Displacement / loading): 97%
    Structure weight / hull surface area: 83 lbs/sq ft or 405 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,92
        - Longitudinal: 2,18
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is adequate
    Room for accommodation and workspaces is adequate
    Good seaboat, rides out heavy weather easily