Yamato, laid down 1938
Length, 263.0 m x Beam, 37.0 m x Depth, 10.4 m
65608 tonnes normal displacement (62970 tonnes standard)
Main battery: 9 x 45.7-cm (3 x 3; 1 superfiring)
Secondary battery: 12 x 15.5-cm (4 x 3)
AA battery: 12 x 12.7-cm
Weight of broadside: 12874 kg
Main belt, 41.0 cm; ends unarmored
Torpedo bulkhead, 13.0 cm
Armor deck, average 20.0 cm
Conning tower, 50.0 cm
Battery armor:
Main, 65.0 cm / secondary, 5.1 cm
Maximum speed for 99576 shaft kw = 27.00 knots
Approximate cruising radius, 6000 nm / 16 knots
Typical complement: 2050-2665
Remarks:
Relative extent of belt armor,
73 percent of 'typical' coverage.
Magazines and engineering spaces are roomy,
with superior
watertight subdivision.
Ship is roomy, with
superior accommodation and working space.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 3540 tonnes = 5 pct
Armor, total ..................... 27254 tonnes = 42 pct
Belt 3696 tonnes = 6 pct
Torpedo bulkhead 3622 tonnes = 6 pct
Deck 11344 tonnes = 17 pct
C.T. 694 tonnes = 1 pct
Armament 7898 tonnes = 12 pct
Machinery ........................ 3654 tonnes = 6 pct
Hull and fittings; equipment ..... 24799 tonnes = 38 pct
Fuel, ammunition, stores ......... 6310 tonnes = 10 pct
Miscellaneous weights ............ 50 tonnes = 0 pct
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65608 tonnes = 100 pct
Estimated metacentric height, 2.5 m
Displacement summary:
Light ship: 59297 tonnes
Standard displacement: 62970 tonnes
Normal service: 65608 tonnes
Full load: 67456 tonnes
Loading submergence 7298 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.10
Shellfire needed to sink: 36950 kg = 27.9 x 45.7-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 14.9
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 56 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.49
Relative quality as a seaboat: 1.13
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Hull form characteristics:
Block coefficient: 0.64
Sharpness coefficient: 0.42
Hull speed coefficient 'M' = 6.54
'Natural speed' for length = 29.4 knots
Power going to wave formation
at top speed: 46 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 72 percent
Relative accommodation and working space: 152 percent
Displacement factor: 106 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.01
(Structure weight per square
metre of hull surface: 1176 kg)
Relative longitudinal hull strength: 1.01
(for 6.40 m average freeboard;
freeboard adjustment -0.33 m)
Relative composite hull strength: 1.01
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[Machine-readable parameters: Spring Style v. 1.2.1]
862.64 x 121.36 x 34.11; 20.99 -- Dimensions
0.64 -- Block coefficient
1938 -- Year laid down
27.00 / 6000 / 16.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
50 tons -- Miscellaneous weights
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9 x 17.99; 3; 1 -- Main battery; turrets; superfiring
:
12 x 6.10; 4 -- Secondary battery; turrets
:
12 x 5.00 -- Tertiary (QF/AA) battery
:
0 -- No fourth (light) battery
0 -- No torpedo armament
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16.14 / 0.00 / 0.00 / 5.12; 73 -- Belt armor; relative extent
7.87 / 19.69 -- Deck / CT
25.59 / 2.01 / 0.00 / 0.00 -- Battery armor
(Note: For portability, values are stored in Anglo-American units)
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