Swego czasu japończycy wykombinowali sobie monstrualne
działo kalibru 480 mm
(oficjalnie zwane 360 mm).
Zbudowano dwa jego egzemplarze, z których jeden uległ zniszczeniu w trakcie
prób. Później, jakiekolwiek prace nad działem zostały wstrzymane w związku z
podpisaniem Traktatu Waszyngtońskiego, choć drugi egzemplarz służył ponoć w
latach 30-tych do testów pancerza dla pancerników typu Yamato, przetrwał wojnę
i został odnaleziony w 1945 r. przez Amerykanów na poligonie Kamegakubi.
Zastanawiałem się, na jaki okręt działo to mogło by trafić gdyby zostało
wprowadzone do służby. Pancernik wyposażony w takie działa musiałby być
gigantyczny – pewnie minimum z 80.000 ton, więc mało realny, ale można by
wymyślić cos mniejszego – np. monitor do ostrzeliwania wybrzeża. Taki właśnie
okręt prezentuję poniżej.
Rysunek wykonałem korzystając z rysunku krążownika Tone
autorstwa Colosseum z shipbucket.com.
Displacement:
8 604 t light; 9 116 t standard; 9 226 t normal; 9 314 t full load
Dimensions: Length overall / water x beam x draught
412,02 ft / 406,43 ft x 97,38 ft x 14,24 ft (normal load)
125,58 m / 123,88 m x 29,68 m x 4,34 m
Armament:
2 - 18,90" / 480 mm guns (1x2 guns), 3 374,37lbs / 1 530,59kg shells, 1929 Model
Breech loading guns in a turret (on a barbette)
on centreline forward
8 - 5,00" / 127 mm guns (4x2 guns), 62,50lbs / 28,35kg shells, 1929 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
12 - 0,98" / 25,0 mm guns (6x2 guns), 0,48lbs / 0,22kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 7 255 lbs / 3 291 kg
Shells per gun, main battery: 80
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3,94" / 100 mm 205,15 ft / 62,53 m 8,10 ft / 2,47 m
Ends: 1,46" / 37 mm 47,34 ft / 14,43 m 8,10 ft / 2,47 m
153,94 ft / 46,92 m Unarmoured ends
Main Belt covers 78% of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
0,79" / 20 mm 205,15 ft / 62,53 m 18,18 ft / 5,54 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8,66" / 220 mm 4,72" / 120 mm 7,87" / 200 mm
2nd: 1,57" / 40 mm - -
- Armour deck: 1,57" / 40 mm, Conning tower: 7,87" / 200 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 1 472 shp / 1 098 Kw = 10,00 kts
Range 3 750nm at 6,00 kts
Bunker at max displacement = 198 tons
Complement:
469 - 611
Cost:
£4,276 million / $17,104 million
Distribution of weights at normal displacement:
Armament: 907 tons, 9,8%
Armour: 1 801 tons, 19,5%
- Belts: 349 tons, 3,8%
- Torpedo bulkhead: 109 tons, 1,2%
- Armament: 447 tons, 4,8%
- Armour Deck: 822 tons, 8,9%
- Conning Tower: 75 tons, 0,8%
Machinery: 44 tons, 0,5%
Hull, fittings & equipment: 5 852 tons, 63,4%
Fuel, ammunition & stores: 622 tons, 6,7%
Miscellaneous weights: 0 tons, 0,0%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15 848 lbs / 7 188 Kg = 4,7 x 18,9 " / 480 mm shells or 3,8 torpedoes
Stability (Unstable if below 1.00): 1,44
Metacentric height 9,1 ft / 2,8 m
Roll period: 13,6 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0,22
Seaboat quality (Average = 1.00): 1,09
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,573
Length to Beam Ratio: 4,17 : 1
'Natural speed' for length: 20,16 kts
Power going to wave formation at top speed: 19 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 19,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16,24 ft / 4,95 m
- Forecastle (32%): 12,89 ft / 3,93 m
- Mid (50%): 12,89 ft / 3,93 m
- Quarterdeck (22%): 12,89 ft / 3,93 m
- Stern: 12,89 ft / 3,93 m
- Average freeboard: 13,32 ft / 4,06 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93,6%
- Above water (accommodation/working, high = better): 147,8%
Waterplane Area: 28 222 Square feet or 2 622 Square metres
Displacement factor (Displacement / loading): 101%
Structure weight / hull surface area: 183 lbs/sq ft or 894 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,93
- Longitudinal: 2,02
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
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