In 1942, the Kursk class underwent a partial (25%) reconstruction to modernize them and extend their service life. They got new engines, gun mounts, air and surface search radar, and a modernized ASW suite. RF Naval Staff now consider them a modern, capable combatant.
Kursk class, Russian Destroyer Escort laid down 1924 (Engine 1942)
Displacement:
1,440 t light; 1,521 t standard; 1,683 t normal; 1,812 t full load
Dimensions: Length overall / water x beam x draught
391.29 ft / 377.30 ft x 32.15 ft x 12.14 ft (normal load)
119.26 m / 115.00 m x 9.80 m x 3.70 m
Armament:
4 - 5.12" / 130 mm guns (2x2 guns), 79.37lbs / 36.00kg shells, 1942 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 1.46" / 37.0 mm guns (1x4 guns), 1.55lbs / 0.70kg shells, 1942 Model
Anti-aircraft guns in a deck mount with hoist
on centreline amidships, all raised guns - superfiring
4 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
4 - 0.55" / 14.0 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 330 lbs / 150 kg
Shells per gun, main battery: 250
8 - 20.5" / 520 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 35,965 shp / 26,830 Kw = 33.00 kts
Range 4,000nm at 15.00 kts
Bunker at max displacement = 291 tons
Complement:
130 - 170
Cost:
£0.583 million / $2.334 million
Distribution of weights at normal displacement:
Armament: 35 tons, 2.1 %
Armour: 7 tons, 0.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 778 tons, 46.2 %
Hull, fittings & equipment: 549 tons, 32.6 %
Fuel, ammunition & stores: 243 tons, 14.4 %
Miscellaneous weights: 71 tons, 4.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
488 lbs / 222 Kg = 7.3 x 5.1 " / 130 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 1.3 ft / 0.4 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.70
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.400
Length to Beam Ratio: 11.73 : 1
'Natural speed' for length: 19.42 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 17.55 ft / 5.35 m
- Mid (50 %): 17.55 ft / 5.35 m (10.50 ft / 3.20 m aft of break)
- Quarterdeck (15 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 14.46 ft / 4.41 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 171.3 %
- Above water (accommodation/working, high = better): 85.5 %
Waterplane Area: 7,467 Square feet or 694 Square metres
Displacement factor (Displacement / loading): 75 %
Structure weight / hull surface area: 35 lbs/sq ft or 173 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.80
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Air search radar - 5 tons
Surface search radar - 5 tons
Torpedos - 16 tons
ASW suite - 45 tons
Original statistics:
Kursk class, Russian Destroyer laid down 1924
Displacement:
1,444 t light; 1,500 t standard; 1,683 t normal; 1,822 t full load
Loading submergence 188 tons/feet
Dimensions:
377.30 ft x 32.15 ft x 12.14 ft (normal load)
115.00 m x 9.80 m x 3.70 m
Armament:
4 - 5.12" / 130 mm guns (2 Main turrets x 2 guns)
4 - 1.46" / 37 mm guns
4 - 0.50" / 13 mm AA guns
Weight of broadside 275 lbs / 125 kg
8 - 20.9" / 530 mm above water torpedoes
50 tons depth charges/mines
Armour:
Main turrets 0.98" / 25 mm, 2nd gun shields 0.98" / 25 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 36,021 shp / 26,872 Kw = 33.00 kts
Range 3,800nm at 15.00 kts
Complement:
131 - 170
Cost:
£0.618 million / $2.473 million
Distribution of weights at normal displacement:
Armament: 34 tons, 2.0 %
Armour: 27 tons, 1.6 %
Belts: 0 tons, 0.0 %, Armament: 27 tons, 1.6 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 862 tons, 51.2 %
Hull, fittings & equipment: 470 tons, 27.9 %
Fuel, ammunition & stores: 239 tons, 14.2 %
Miscellaneous weights: 50 tons, 3.0 %
Metacentric height 1.3
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: 1.24
Shellfire needed to sink: 385 lbs / 174 Kg = 5.7 x 5.1 " / 130 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.3
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 71 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.61
Relative quality as seaboat: 1.21
Hull form characteristics:
Block coefficient: 0.400
Sharpness coefficient: 0.28
Hull speed coefficient 'M': 9.69
'Natural speed' for length: 19.42 kts
Power going to wave formation at top speed: 62 %
Trim: 59
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 184.1 %
Relative accommodation and working space: 76.0 %
(Average = 100%)
Displacement factor: 62 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight / hull surface area: 35 lbs / square foot or 171 Kg / square metre)
Relative longitudinal hull strength: 1.04
(for 14.44 ft / 4.40 m average freeboard, freeboard adjustment 3.83 ft)
Relative composite hull strength: 0.53