French Bisson class destroyers, laid down 1910
Length, 70.0 m x Beam, 7.5 m x Depth, 3.8 m
805 tonnes normal displacement (723 tonnes standard)
Main battery: 2 x 10.0-cm
Secondary
battery: 4 x 6.5-cm
QF battery: 2
x 4.5-cm
Light battery: 4 x 1.3-cm
Weight of broadside: 46 kg
4 TT, 45.0 cm
Hull unarmored
40 tons depth charges/mines
Maximum speed for 15624 shaft kw = 30.00 knots
Approximate cruising radius, 3000 nm / 10 knots
Typical complement: 76-98
Estimated cost, $384,000 (£96,000)
Remarks:
Caution: Hull structure is subject to strain in open-sea
conditions.
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 ......................... 13
tonnes = 2 pct
Machinery ........................
435 tonnes = 54 pct
Hull and fittings; equipment .....
211 tonnes = 26 pct
Fuel, ammunition, stores .........
106 tonnes = 13 pct
Miscellaneous weights ............
40 tonnes = 5 pct
-----
805 tonnes = 100 pct
Estimated metacentric height, 0.3 m
Displacement summary:
Light ship:
699 tonnes
Standard displacement: 723 tonnes
Normal service:
805 tonnes
Full load:
867 tonnes
Loading submergence 286 tonnes/metre
+++++++++++++++++++++++++
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.20
Shellfire needed to sink: 78 kg = 5.6 x 10.0-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, 53 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.26
Relative quality as a seaboat: 1.06
+++++++++++++++++++++++++
Hull form characteristics:
Block coefficient: 0.40
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 7.54
'Natural speed' for length = 15.2 knots
Power going to wave formation
at top speed: 72 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 192 percent
Relative accommodation and working space: 66 percent
Displacement factor: 39 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight per square
metre
of hull surface: 143 kg)
Relative longitudinal hull strength: 2.64
(for 4.00 m average freeboard;
freeboard
adjustment +1.21 m)
Relative composite hull strength: 0.59
+++++++++++++++++++++++++
[Machine-readable parameters: Spring Style v. 1.2.1]
229.60 x 24.60 x 12.46; 13.12 -- Dimensions
0.40 -- Block coefficient
1910 -- Year laid down
30.00 / 3000
/ 10.00; Turbine, coal fired -- Speed / radius / cruise
40 tons -- Miscellaneous weights
++++++++++
2 x 3.94;
0 -- Main battery; turrets
Central positioning of guns
:
4 x 2.56; 0 -- Secondary battery;
turrets
:
2 x 1.77 -- Tertiary (QF/AA) battery
:
4 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)
+++++++++++++++++++++++++++++++++++++++++++++++++++++++