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Audaciaux class destroyer
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The Audaciaux class destroyer begins the replacement of French pre-Great War destroyers, and introduces the 120mm gun in service on French destroyers.

French Audaciaux class destroyer, laid down 1921

Length, 100.0 m x Beam, 8.8 m x Depth, 3.6 m
1366 tonnes normal displacement (1231 tonnes standard)

Main battery: 3 x 12.0-cm (3 x 1; 1 superfiring)
AA battery: 4 x 4.0-cm
Light battery: 4 x 1.3-cm

Weight of broadside: 75 kg

8 TT, 53.0 cm in two quadruple mounts

50 tons depth charges

Hull unarmored

Maximum speed for 26049 shaft kw = 33.00 knots
Approximate cruising radius, 5100 nm / 12 knots

Typical complement: 112-146


Estimated cost, $1.667 million (417,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

Ship has slow, easy roll; a good, steady gun platform.

Good seaboat; rides out heavy weather easily.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.

Cramped ship; poor crew accommodation, limited working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 21 tonnes = 2 pct
Machinery ........................ 749 tonnes = 55 pct
Hull and fittings; equipment ..... 370 tonnes = 27 pct
Fuel, ammunition, stores ......... 176 tonnes = 13 pct
Miscellaneous weights ............ 50 tonnes = 4 pct
-----
1366 tonnes = 100 pct

Estimated metacentric height, 0.3 m

Displacement summary:

Light ship: 1190 tonnes
Standard displacement: 1231 tonnes
Normal service: 1366 tonnes
Full load: 1468 tonnes

Loading submergence 501 tonnes/metre

+++++++++++++++++++++++++

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.17

Shellfire needed to sink: 132 kg = 5.5 x 12.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.2
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 70 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.59

Relative quality as a seaboat: 1.20

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.43
Sharpness coefficient: 0.29
Hull speed coefficient 'M' = 9.04
'Natural speed' for length = 18.1 knots
Power going to wave formation
at top speed: 67 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 192 percent

Relative accommodation and working space: 57 percent


Displacement factor: 52 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.50
(Structure weight per square
metre of hull surface: 158 kg)

Relative longitudinal hull strength: 1.42
(for 4.51 m average freeboard;
freeboard adjustment +1.41 m)

Relative composite hull strength: 0.55

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

328.00 x 28.70 x 11.81; 14.81 -- Dimensions
0.43 -- Block coefficient
1921 -- Year laid down
33.00 / 5100 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
50 tons -- Miscellaneous weights
++++++++++
3 x 4.72; 3; 1 -- Main battery; turrets; superfiring
:
0 -- No secondary battery
4 x 1.57 -- Tertiary (QF/AA) battery
:
4 x 0.51 -- Fourth (light) battery
8 / 0 / 20.87 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
0.00 -- No battery armor


(Note: For portability, values are stored in Anglo-American units)


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