Danton Class Predreadnought Battleships, laid down 1908
Length, 145.0 m x Beam, 25.6 m x Depth, 9.2 m
17904 tonnes normal displacement (17242 tonnes standard)
Main battery: 4 x 30.5-cm (2 x 2)
Secondary battery: 12 x 24.0-cm (6 x 2)
QF battery:
10 x 4.7-cm
Light battery: 12 x 7.5-cm
Weight of broadside: 3959 kg
2 TT, 45.0 cm (submerged)
Main belt, 25.0 cm; bow and stern, 10.0 cm
Upper belt, 10.0 cm
Torpedo bulkhead, 3.0 cm
Armor deck, average 9.0 cm
Conning tower, 30.5 cm
Battery armor:
Main, 30.0 cm / secondary,
22.0 cm
QF, 22.0 cm / light guns, 5.0 cm shields
Maximum speed for 16408 shaft kw = 20.00 knots
Approximate cruising radius, 3500 nm / 10 knots
Typical complement: 774-1006
Estimated cost, $6.605 million (£1.651 million)
Remarks:
Relative extent of belt armor, 120 percent of 'typical' coverage.
Good seaboat; rides out heavy weather easily.
Main deck QF guns subject to being washed down in a seaway.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 1089 tonnes =
6 pct
Armor, total ..................... 7432 tonnes
= 42 pct
Belt
2602 tonnes = 15 pct
Torpedo
bulkhead 408 tonnes =
2 pct
Deck
1689 tonnes = 9 pct
C.T.
177 tonnes = 1 pct
Armament
2555 tonnes = 14 pct
Machinery ........................ 1221 tonnes =
7 pct
Hull and fittings; equipment ..... 6416 tonnes
= 36 pct
Fuel, ammunition, stores ......... 1746
tonnes = 10 pct
Miscellaneous weights ............
0 tonnes = 0 pct
-----
17904 tonnes = 100 pct
Estimated metacentric height, 1.3 m
Displacement summary:
Light ship:
16158 tonnes
Standard displacement: 17242 tonnes
Normal service: 17904 tonnes
Full load: 18362 tonnes
Loading submergence 2415 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.06
Shellfire needed to sink: 7499 kg = 19.1 x 30.5-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not
counting critical hits)
Torpedoes needed to sink: 2.8
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 53 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.55
Relative quality as a seaboat: 1.32
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Hull form characteristics:
Block coefficient: 0.52
Sharpness coefficient: 0.41
Hull speed coefficient 'M' = 5.56
'Natural speed' for length = 21.8 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: 93 percent
Relative accommodation and working space: 102 percent
Displacement factor: 96 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.93
(Structure weight per square
metre
of hull surface: 817 kg)
Relative longitudinal hull strength: 2.02
(for 4.90 m average freeboard;
freeboard
adjustment -0.29 m)
Relative composite hull strength: 1.01
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[Machine-readable parameters: Spring Style v. 1.2.1]
475.60 x 83.97 x 30.18; 16.07 -- Dimensions
0.52 -- Block coefficient
1908 -- Year laid down
20.00 / 3500
/ 10.00; Turbine, coal fired -- Speed / radius / cruise
0 tons -- Miscellaneous weights
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4 x 12.01;
2; 0 -- Main battery; turrets; superfiring
:
12 x 9.45; 6 -- Secondary battery; turrets
:
10 x 1.85 -- Tertiary (QF/AA) battery
Main deck battery
:
12 x 2.95 -- Fourth (light)
battery
2 / 2 / 17.72 -- TT / submerged / size
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9.84 / 3.94 / 3.94 / 1.18; 120 -- Belt armor; relative
extent
3.54 / 12.01 -- Deck / CT
11.81 / 8.66 / 8.66 / 1.97 -- Battery armor
(Note: For portability, values are stored in Anglo-American units)
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