środa, 29 sierpnia 2012

Francuski krążownik kolonialny - 01.06.2010

Oto propozycja małego i taniego krążownika kolonialnego dla francuskiej MW. W latach 1890-tych we Francji postulowano posiadanie 34 krążowników do obrony kolonii. W tej liczbie mieściły się oczywiście różne stare jednostki, jak pancerniki kazamatowe, krążowniki nieopancerzone i inne. Te okręty mogły by być uzupełnione, a w dalszej perspektywie - zastąpione, przez nowy typ małego krążownika, który dzięki niskiej cenie mógłby być zbudowany w większej liczbie. Proponowany okręt mógłby wyglądać następująco:

Aquilon, french cruiser laid down 1891 (Engine 1892)

Displacement:
    1 520 t light; 1 584 t standard; 1 772 t normal; 1 923 t full load

Dimensions: Length overall / water x beam x draught
    283,46 ft / 283,46 ft x 30,18 ft x 13,45 ft (normal load)
    86,40 m / 86,40 m x 9,20 m  x 4,10 m

Armament:
      4 - 3,94" / 100 mm guns in single mounts, 30,51lbs / 13,84kg shells, 1891 Model
      Quick firing guns in deck mounts with hoists
      on side ends, evenly spread
      6 - 2,24" / 57,0 mm guns in single mounts, 5,65lbs / 2,56kg shells, 1891 Model
      Breech loading guns in deck mounts
      on side, all amidships
    Weight of broadside 156 lbs / 71 kg
    Shells per gun, main battery: 300
    1 - 14,0" / 356 mm submerged torpedo tubes

Armour:
   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    0,59" / 15 mm          -                  -

   - Armour deck: 0,87" / 22 mm

Machinery:
    Coal fired boilers, complex reciprocating steam engines,
    Direct drive, 2 shafts, 4 941 ihp / 3 686 Kw = 19,00 kts
    Range 4 200nm at 9,00 kts
    Bunker at max displacement = 339 tons (100% coal)

Complement:
    136 - 177

Cost:
    £0,183 million / $0,732 million

Distribution of weights at normal displacement:
    Armament: 19 tons, 1,1%
    Armour: 100 tons, 5,6%
       - Belts: 0 tons, 0,0%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 5 tons, 0,3%
       - Armour Deck: 95 tons, 5,3%
       - Conning Tower: 0 tons, 0,0%
    Machinery: 811 tons, 45,7%
    Hull, fittings & equipment: 590 tons, 33,3%
    Fuel, ammunition & stores: 252 tons, 14,2%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      853 lbs / 387 Kg = 27,9 x 3,9 " / 100 mm shells or 0,3 torpedoes
    Stability (Unstable if below 1.00): 1,41
    Metacentric height 1,5 ft / 0,5 m
    Roll period: 10,3 seconds
    Steadiness    - As gun platform (Average = 50 %): 100 %
            - Recoil effect (Restricted arc if above 1.00): 0,35
    Seaboat quality  (Average = 1.00): 2,00

Hull form characteristics:
    Hull has raised quarterdeck
    Block coefficient: 0,539
    Length to Beam Ratio: 9,39 : 1
    'Natural speed' for length: 16,84 kts
    Power going to wave formation at top speed: 49 %
    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:        17,39 ft / 5,30 m
       - Forecastle (20%):    12,14 ft / 3,70 m
       - Mid (50%):        12,14 ft / 3,70 m
       - Quarterdeck (15%):    12,14 ft / 3,70 m (11,78 ft / 3,59 m before break)
       - Stern:        13,12 ft / 4,00 m
       - Average freeboard:    12,57 ft / 3,83 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 162,7%
        - Above water (accommodation/working, high = better): 99,7%
    Waterplane Area: 5 910 Square feet or 549 Square metres
    Displacement factor (Displacement / loading): 88%
    Structure weight / hull surface area: 51 lbs/sq ft or 249 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,90
        - Longitudinal: 2,63
        - Overall: 1,00
    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

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