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Roland class, French Light cruiser laid down 1924
Displacement:
3,904 t light; 4,086 t
standard; 4,843 t normal; 5,430 t full load
Loading submergence 399 tons/feet
Dimensions:
524.93 ft x 49.21
ft x 16.40 ft (normal load)
160.00 m x 15.00 m x 5.00 m
Armament:
8 - 5.91" / 150 mm guns (3 Main turrets,
1 superfiring turret (A-2, B-3, X-3)
6 - 3.94" / 100 mm guns
8 - 1.57" / 40 mm AA guns
Weight of broadside 1,023
lbs / 464 kg
8 - 20.9" / 530 mm above water torpedoes
Armour:
Main turrets 0.98" / 25 mm, 2nd gun shields
0.98" / 25 mm
AA gun shields 0.98" / 25 mm
Conning tower 0.98" / 25 mm
Aircraft: 1 Seaplane, 1 Catapult
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 72,502 shp / 54,086 Kw = 34.50 kts
Range 13,600nm at
12.00 kts
Complement:
290 - 377
Cost:
£1.781 million / $7.124 million
Distribution of weights
at normal displacement:
Armament: 128 tons, 2.6 %
Armour: 94 tons, 1.9 %
Belts: 0 tons, 0.0 %, Armament: 88 tons,
1.8 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 6 tons, 0.1 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 2,373 tons,
49.0 %
Hull, fittings & equipment: 1,269 tons, 26.2 %
Fuel, ammunition & stores: 940 tons, 19.4 %
Miscellaneous
weights: 40 tons, 0.8 %
Metacentric height 3.1
Remarks:
Caution: Hull subject to strain in open-sea
Hull
space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is excellent
Ship
has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Estimated overall
survivability and seakeeping ability:
Relative margin of stability: 1.41
Shellfire needed to sink: 1,163 lbs / 528
Kg = 11.3 x 5.9 " / 150 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.5
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness
as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.48
Relative quality as seaboat:
1.20
Hull form characteristics:
Block coefficient: 0.400
Sharpness coefficient: 0.29
Hull speed coefficient
'M': 9.49
'Natural speed' for length: 22.91 kts
Power going to wave formation at top speed: 58 %
Trim: 58
(Maximise
stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater
volume absorbed by magazines and engineering spaces: 179.2 %
Relative accommodation and working space: 131.3 %
(Average
= 100%)
Displacement factor: 82 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength:
0.50
(Structure weight / hull surface area: 49 lbs / square foot or 239 Kg / square metre)
Relative longitudinal hull
strength: 0.81
(for 18.11 ft / 5.52 m average freeboard, freeboard adjustment 5.01 ft)
Relative composite hull strength:
0.52
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