A little coastdefence ship for my swedish navy. site updated since last visited.
Dalarö, Sweden Coast defence ship laid down 1896
Displacement:
4 186 t light; 4 441 t standard; 4 500 t normal; 4 529 t full load
Loading submergence 395 tons/feet
Dimensions:
311,68 ft x 59,06 ft x 13,12 ft (normal load)
95,00 m x 18,00 m x 4,00 m
Armament:
2 - 10,83" / 275 mm guns (2 Main turrets x 1 guns)
6 - 6,00" / 152 mm guns
10 - 2,24" / 57 mm QF guns
QF guns mounted low & subject to being washed down in a seaway
4 - 0,79" / 20 mm guns
Weight of broadside 1 975 lbs / 896 kg
2 - 18,0" / 457,2 mm submerged torpedo tubes
Armour:
Belt 7,28" / 185 mm, upper belt 1,97" / 50 mm, end belts 1,97" / 50 mm
Belts cover 100 % of normal area
Main belt does not fully protect magazines and engineering spaces
Main turrets 7,28" / 185 mm, 2nd gun shields 1,97" / 50 mm
QF casemates 1,97" / 50 mm
Armour deck 1,97" / 50 mm, Conning tower 7,28" / 185 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 3 shafts, 4 958 ihp / 3 699 Kw = 16,00 kts
Range 1 000nm at 8,00 kts
Complement:
274 - 357
Cost:
£0,468 million / $1,870 million
Distribution of weights at normal displacement:
Armament: 247 tons, 5,5 %
Armour: 1 709 tons, 38,0 %
Belts: 822 tons, 18,3 %, Armament: 342 tons, 7,6 %, Armour Deck: 503 tons, 11,2 %
Conning Tower: 43 tons, 0,9 %, Torpedo bulkhead: 0 tons, 0,0 %
Machinery: 812 tons, 18,1 %
Hull, fittings & equipment: 1 418 tons, 31,5 %
Fuel, ammunition & stores: 314 tons, 7,0 %
Miscellaneous weights: 0 tons, 0,0 %
Metacentric height 3,3
Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable and able to fight her guns in the heaviest weather
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1,24
Shellfire needed to sink: 3 832 lbs / 1 738 Kg = 6,0 x 10,8 " / 275 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 1,0
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 90 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0,67
Relative quality as seaboat: 1,80
Hull form characteristics:
Block coefficient: 0,652
Sharpness coefficient: 0,47
Hull speed coefficient 'M': 5,77
'Natural speed' for length: 17,65 kts
Power going to wave formation at top speed: 47 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 105,1 %
Relative accommodation and working space: 157,6 %
(Average = 100%)
Displacement factor: 84 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0,63
(Structure weight / hull surface area: 74 lbs / square foot or 361 Kg / square metre)
Relative longitudinal hull strength: 1,76
(for 16,40 ft / 5,00 m average freeboard, freeboard adjustment 3,50 ft)
Relative composite hull strength: 0,69