Krążownik liniowy proj. 770 - 06.05.2010

Na początku lat 30-tych we Włoszech narodził się pomysł zbudowania czegoś w rodzaju pancernika kieszonkowego (czy jak kto woli - krążownika liniowego lub wielkiego krążownika). Projekt 770 zakładał okręt ok. 18000-tonowy, uzbrojony w 6 dział 343 mm i posiadający prędkość 26 w. Przeznaczenie takiej jednostki pozostaje niejasne - być może chodziło po prostu o zbudowanie  okrętu szybszego od silniejszych (choć też nie do końca - bo Brytyjczycy mieli wciąż swoje krążowniki liniowe) i silniejszego od szybszych (krążowników waszyngtońskich)?

 
źródło: http://xoomer.virgilio.it/bk/NWS/Fictional/Fake_pictures/image-html/italian770.html

 
źródło: http://www.bobhenneman.info/18000design.htm

Ottaviano Augusto, italian battlecruiser laid down 1931 (Engine 1933)

Displacement:
    17 161 t light; 18 136 t standard; 19 192 t normal; 20 037 t full load

Dimensions: Length overall / water x beam x draught
    606,94 ft / 593,60 ft x 85,96 ft x 25,26 ft (normal load)
    185,00 m / 180,93 m x 26,20 m  x 7,70 m

Armament:
      6 - 13,50" / 343 mm guns (2x3 guns), 1 231,26lbs / 558,49kg shells, 1931 Model
      Breech loading guns in turrets (on barbettes)
      on centreline ends, evenly spread
      8 - 5,98" / 152 mm guns (4x2 guns), 107,15lbs / 48,60kg shells, 1931 Model
      Quick firing guns in turrets (on barbettes)
      on side ends, evenly spread
      12 - 3,94" / 100 mm guns (6x2 guns), 30,51lbs / 13,84kg shells, 1931 Model
      Dual purpose guns in deck mounts with hoists
      on side, all amidships
      12 - 1,46" / 37,0 mm guns (2x6 guns), 1,55lbs / 0,70kg shells, 1931 Model
      Anti-aircraft guns in deck mounts
      on centreline ends, evenly spread
    Weight of broadside 8 629 lbs / 3 914 kg
    Shells per gun, main battery: 120
    10 - 17,7" / 450 mm submerged torpedo tubes

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    11,0" / 280 mm    374,02 ft / 114,00 m    10,50 ft / 3,20 m
    Ends:    6,10" / 155 mm    219,49 ft / 66,90 m    8,20 ft / 2,50 m
    Upper:    8,27" / 210 mm    343,50 ft / 104,70 m    5,58 ft / 1,70 m
      Main Belt covers 97% of normal length
      Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
        1,77" / 45 mm    524,93 ft / 160,00 m    19,69 ft / 6,00 m

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    11,0" / 280 mm    7,87" / 200 mm        8,27" / 210 mm
    2nd:    4,72" / 120 mm    3,54" / 90 mm        3,54" / 90 mm
    3rd:    1,97" / 50 mm          -                  -

   - Armour deck: 1,97" / 50 mm, Conning tower: 12,01" / 305 mm

Machinery:
    Oil fired boilers, steam turbines,
    Geared drive, 2 shafts, 58 334 shp / 43 517 Kw = 26,00 kts
    Range 5 500nm at 15,00 kts
    Bunker at max displacement = 1 900 tons

Complement:
    814 - 1 059

Cost:
    £7,613 million / $30,453 million

Distribution of weights at normal displacement:
    Armament: 1 079 tons, 5,6%
    Armour: 6 426 tons, 33,5%
       - Belts: 2 989 tons, 15,6%
       - Torpedo bulkhead: 677 tons, 3,5%
       - Armament: 1 312 tons, 6,8%
       - Armour Deck: 1 262 tons, 6,6%
       - Conning Tower: 185 tons, 1,0%
    Machinery: 1 700 tons, 8,9%
    Hull, fittings & equipment: 7 956 tons, 41,5%
    Fuel, ammunition & stores: 2 031 tons, 10,6%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      25 358 lbs / 11 502 Kg = 20,6 x 13,5 " / 343 mm shells or 4,4 torpedoes
    Stability (Unstable if below 1.00): 1,17
    Metacentric height 5,4 ft / 1,6 m
    Roll period: 15,6 seconds
    Steadiness    - As gun platform (Average = 50 %): 54 %
            - Recoil effect (Restricted arc if above 1.00): 0,48
    Seaboat quality  (Average = 1.00): 1,08

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,521
    Length to Beam Ratio: 6,91 : 1
    'Natural speed' for length: 24,36 kts
    Power going to wave formation at top speed: 51 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): 22,60 degrees
    Stern overhang: 3,81 ft / 1,16 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        22,90 ft / 6,98 m
       - Forecastle (20%):    17,19 ft / 5,24 m
       - Mid (50%):        17,19 ft / 5,24 m
       - Quarterdeck (15%):    17,19 ft / 5,24 m
       - Stern:        17,19 ft / 5,24 m
       - Average freeboard:    17,65 ft / 5,38 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 100,8%
        - Above water (accommodation/working, high = better): 139,4%
    Waterplane Area: 34 663 Square feet or 3 220 Square metres
    Displacement factor (Displacement / loading): 104%
    Structure weight / hull surface area: 165 lbs/sq ft or 808 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,96
        - Longitudinal: 1,40
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is adequate
    Room for accommodation and workspaces is excellent