Arabe Class Destroyer, laid down 1917
Length, 90.0 m x Beam, 8.5 m x Depth, 4.0 m
1234 tonnes normal displacement (1140 tonnes standard)
Main battery: 1 x 12.0-cm (1 x 1)
Secondary battery: 4 x 7.5-cm
AA battery:
2 x 4.5-cm
Light battery: 6 x 1.3-cm
Weight of broadside: 50 kg
4 TT, 45.0 cm
Hull unarmored
Maximum speed for 22692 shaft kw = 32.00 knots
Approximate cruising radius, 5000 nm / 10 knots
Typical complement: 104-135
Estimated cost, $1.045 million (£261,000)
Remarks:
Caution: Hull structure is subject to strain in open-sea
conditions.
Oil firing.
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.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 14
tonnes = 1 pct
Machinery ........................
667 tonnes = 54 pct
Hull and fittings; equipment .....
325 tonnes = 26 pct
Fuel, ammunition, stores .........
128 tonnes = 10 pct
Miscellaneous weights ............
100 tonnes = 8 pct
-----
1234 tonnes = 100 pct
Estimated metacentric height, 0.3 m
Displacement summary:
Light ship:
1106 tonnes
Standard displacement: 1140 tonnes
Normal service: 1234 tonnes
Full load: 1304 tonnes
Loading submergence 417 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.16
Shellfire needed to sink: 119 kg = 5.0 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, 71 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.45
Relative quality as a seaboat: 1.28
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Hull form characteristics:
Block coefficient: 0.40
Sharpness coefficient: 0.29
Hull speed coefficient 'M' = 8.41
'Natural speed' for length = 17.2 knots
Power going to wave formation
at top speed: 68 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 192 percent
Relative accommodation and working space: 92 percent
Displacement factor: 51 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight per square
metre
of hull surface: 155 kg)
Relative longitudinal hull strength: 1.93
(for 4.50 m average freeboard;
freeboard
adjustment +1.46 m)
Relative composite hull strength: 0.57
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[Machine-readable parameters: Spring Style v. 1.2.1]
295.20 x 27.88 x 13.12; 14.76 -- Dimensions
0.40 -- Block coefficient
1917 -- Year laid down
32.00 / 5000
/ 10.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
100 tons -- Miscellaneous weights
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1
x 4.72; 1 -- Main battery; turrets
Central positioning of guns
:
4 x 2.95; 0 -- Secondary
battery; turrets
:
2 x 1.77 -- Tertiary (QF/AA) battery
:
6 x 0.51 -- Fourth (light)
battery
4 / 0 / 17.72 -- 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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