Vakt Class, Gothia Works Destroyer laid down 1935
Displacement:
2 940 t light; 3 076 t standard; 3 337 t normal; 3 546 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(446,05 ft / 442,91 ft) x 45,93 ft x (16,40 / 17,01 ft)
(135,96 m / 135,00 m) x 14,00 m x (5,00 / 5,18 m)
Armament:
6 - 5,91" / 150 mm 45,0 cal guns - 103,86lbs / 47,11kg shells, 150 per gun
Breech loading guns in Coles/Ericsson turret mounts, 1935 Model
2 x 2-gun mounts on centreline, evenly spread
1 x 2-gun mount on centreline ends, evenly spread
1 raised mount
Aft Main mounts separated by engine room
16 - 1,57" / 40,0 mm 45,0 cal guns - 1,97lbs / 0,89kg shells, 1 000 per gun
Anti-air guns in deck mounts, 1935 Model
8 x 2-gun mounts on sides, evenly spread
Weight of broadside 655 lbs / 297 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2,00" / 51 mm 310,04 ft / 94,50 m 8,13 ft / 2,48 m
Ends: 1,00" / 25 mm 132,85 ft / 40,49 m 8,13 ft / 2,48 m
Upper: 1,00" / 25 mm 310,04 ft / 94,50 m 8,00 ft / 2,44 m
Main Belt covers 108 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,50" / 38 mm - -
- Armoured deck - multiple decks: 0,50" / 13 mm For and Aft decks
Forecastle: 0,50" / 13 mm Quarter deck: 0,50" / 13 mm
- Conning towers: Forward 2,00" / 51 mm, Aft 0,00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 57 668 shp / 43 020 Kw = 34,00 kts
Range 4 000nm at 15,00 kts
Bunker at max displacement = 471 tons
Complement:
219 - 285
Cost:
£1,904 million / $7,616 million
Distribution of weights at normal displacement:
Armament: 186 tons, 5,6 %
Armour: 481 tons, 14,4 %
- Belts: 343 tons, 10,3 %
- Armament: 15 tons, 0,4 %
- Armour Deck: 113 tons, 3,4 %
- Conning Tower: 10 tons, 0,3 %
Machinery: 1 502 tons, 45,0 %
Hull, fittings & equipment: 771 tons, 23,1 %
Fuel, ammunition & stores: 398 tons, 11,9 %
Miscellaneous weights: 0 tons, 0,0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
956 lbs / 434 Kg = 9,3 x 5,9 " / 150 mm shells or 0,5 torpedoes
Stability (Unstable if below 1.00): 1,40
Metacentric height 2,8 ft / 0,9 m
Roll period: 11,5 seconds
Steadiness - As gun platform (Average = 50 %): 40 %
- Recoil effect (Restricted arc if above 1.00): 0,29
Seaboat quality (Average = 1.00): 0,65
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0,350 / 0,359
Length to Beam Ratio: 9,64 : 1
'Natural speed' for length: 21,05 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 12,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15,00 %, 14,76 ft / 4,50 m, 13,12 ft / 4,00 m
- Forward deck: 35,00 %, 13,12 ft / 4,00 m, 13,12 ft / 4,00 m
- Aft deck: 35,00 %, 13,12 ft / 4,00 m, 13,12 ft / 4,00 m
- Quarter deck: 15,00 %, 13,12 ft / 4,00 m, 13,12 ft / 4,00 m
- Average freeboard: 13,22 ft / 4,03 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 162,7 %
- Above water (accommodation/working, high = better): 128,3 %
Waterplane Area: 12 147 Square feet or 1 128 Square metres
Displacement factor (Displacement / loading): 77 %
Structure weight / hull surface area: 46 lbs/sq ft or 223 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,51
- Longitudinal: 0,89
- Overall: 0,54
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Caution: Lacks seaworthiness - very limited seakeeping ability
Revised design
Comments welcome