Wroclaw IV Class, Poland Destroyer laid down 1941
Displacement:
2.326 t light; 2.429 t standard; 2.679 t normal; 2.878 t full load
Dimensions: Length overall / water x beam x draught
386,08 ft / 377,72 ft x 40,03 ft x 14,76 ft (normal load)
117,68 m / 115,13 m x 12,20 m x 4,50 m
Armament:
8 - 3,94" / 100 mm guns (4x2 guns), 30,51lbs / 13,84kg shells, 1941 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread, 2 raised mounts - superfiring
14 - 0,79" / 20,0 mm guns (7x2 guns), 0,24lbs / 0,11kg shells, 1941 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
2 - 0,50" / 12,7 mm guns in single mounts, 0,06lbs / 0,03kg shells, 1941 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 248 lbs / 112 kg
Shells per gun, main battery: 350
8 - 20,9" / 530 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,87" / 22 mm 0,71" / 18 mm -
2nd: 0,39" / 10 mm - -
- Conning tower: 0,87" / 22 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 45.563 shp / 33.990 Kw = 33,65 kts
Range 5.000nm at 15,00 kts
Bunker at max displacement = 450 tons
Complement:
186 - 242
Cost:
£1,698 million / $6,791 million
Distribution of weights at normal displacement:
Armament: 31 tons, 1,2%
Armour: 20 tons, 0,7%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 16 tons, 0,6%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 4 tons, 0,1%
Machinery: 1.194 tons, 44,6%
Hull, fittings & equipment: 1.031 tons, 38,5%
Fuel, ammunition & stores: 352 tons, 13,2%
Miscellaneous weights: 50 tons, 1,9%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1.480 lbs / 671 Kg = 48,5 x 3,9 " / 100 mm shells or 0,5 torpedoes
Stability (Unstable if below 1.00): 1,23
Metacentric height 1,9 ft / 0,6 m
Roll period: 12,3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,18
Seaboat quality (Average = 1.00): 1,19
Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0,420
Length to Beam Ratio: 9,44 : 1
'Natural speed' for length: 22,52 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22,97 ft / 7,00 m
- Forecastle (20%): 19,03 ft / 5,80 m
- Mid (40%): 19,03 ft / 5,80 m
- Quarterdeck (15%): 11,81 ft / 3,60 m (19,03 ft / 5,80 m before break)
- Stern: 11,81 ft / 3,60 m
- Average freeboard: 18,26 ft / 5,57 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 156,2%
- Above water (accommodation/working, high = better): 122,0%
Waterplane Area: 9.785 Square feet or 909 Square metres
Displacement factor (Displacement / loading): 98%
Structure weight / hull surface area: 52 lbs/sq ft or 253 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,69
- Longitudinal: 3,59
- Overall: 0,81
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform