Sohunden Class Torpedo Boat laid down 1917
All scrapped 1939
Vessels-
K.D.M. Sohunden
K.D.M. Havhesten
K.D.M. Makrelen
K.D.M. Narvhalen
K.D.M. Nordkaperen
K.D.M. Soloven
K.D.M. Springeren - Sunk due to enemy action
K.D.M. Storen
K.D.M. Havornen
K.D.M. Sobjornen
Displacement:
1,254 t light; 1,290 t standard; 1,489 t normal; 1,643 t full load
Loading submergence 140 tons/feet
Dimensions:
270.00 ft x 27.00 ft x 13.00 ft (normal load)
82.30 m x 8.23 m x 3.96 m
Armament:
4 - 3.00" / 76 mm guns
4 - 2.00" / 51 mm AA guns
4 - 0.50" / 13 mm guns
Weight of broadside 70 lbs / 32 kg
8 - 18.0" / 457.2 mm above water torpedoes
Armour:
Main gun shields 1.00" / 25 mm, AA gun shields 0.50" / 13 mm, Light gun shields 0.25" / 6 mm
Conning tower 1.00" / 25 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 40,441 shp / 30,169 Kw = 32.00 kts
Range 6,500nm at 12.00 kts
Complement:
119 - 155
Cost:
£0.320 million / $1.281 million
Distribution of weights at normal displacement:
Armament: 9 tons, 0.6 %
Armour: 8 tons, 0.5 %
Belts: 0 tons, 0.0 %, Armament: 5 tons, 0.3 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 3 tons, 0.2 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 892 tons, 59.9 %
Hull, fittings & equipment: 320 tons, 21.5 %
Fuel, ammunition & stores: 235 tons, 15.8 %
Miscellaneous weights: 25 tons, 1.7 %
Metacentric height 0.9
Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped
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: 1.17
Shellfire needed to sink: 291 lbs / 132 Kg = 21.6 x 3.0 " / 76 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 78 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.19
Relative quality as seaboat: 1.21
Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.35
Hull speed coefficient 'M': 7.23
'Natural speed' for length: 16.43 kts
Power going to wave formation at top speed: 76 %
Trim: 64
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 199.6 %
Relative accommodation and working space: 62.5 %
(Average = 100%)
Displacement factor: 49 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.46
(Structure weight / hull surface area: 29 lbs / square foot or 142 Kg / square metre)
Relative longitudinal hull strength: 2.32
(for 18.00 ft / 5.49 m average freeboard, freeboard adjustment 7.65 ft)
Relative composite hull strength: 0.54
Torpedoes are mounted in 2 X 4 tube turrets placed tandem amidships
This post has been edited 1 times, last edit by "Commodore Green" (Sep 19th 2010, 11:43pm)