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Admiral Ushakov class, Russian Light Cruisers laid down 1924
Displacement:
7,523 t light;
7,886 t standard; 9,291 t normal; 10,415 t full load
Dimensions: Length overall / water x beam x draught
604.47
ft / 600.39 ft x 55.12 ft x 21.00 ft (normal load)
184.24 m / 183.00 m x 16.80 m x 6.40 m
Armament:
12 - 5.91"
/ 150 mm guns (4x3 guns), 125.66lbs / 57.00kg shells, 1924 Model
Breech loading guns in turrets (on barbettes)
on
centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 3.94" / 100 mm guns (6x2 guns), 37.48lbs / 17.00kg
shells, 1924 Model
Dual purpose guns in deck mounts
on side, evenly spread
24 - 1.46" / 37.0 mm guns (8x3 guns),
1.54lbs / 0.70kg shells, 1924 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside
1,995 lbs / 905 kg
Shells per gun, main battery: 150
12 - 20.9" / 530 mm above water torpedoes
Armour:
-
Belts: Width (max) Length (avg) Height (avg)
Main: 2.95" / 75 mm 421.75 ft / 128.55 m 9.19 ft / 2.80 m
Ends: Unarmoured
Main Belt covers 108 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main:
2.95" / 75 mm 0.98" / 25 mm 1.97" / 50 mm
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm - -
- Armour
deck: 0.98" / 25 mm, Conning tower: 2.95" / 75 mm
Aviation:
1 Seaplane, 1 Catapult
Machinery:
Oil
fired boilers, steam turbines,
Geared drive, 4 shafts, 78,162 shp / 58,309 Kw = 32.00 kts
Range 10,800nm at 15.00
kts (Bunkerage = 2,529 tons)
Complement:
473 - 615
Cost:
£2.460 million / $9.839 million
Distribution
of weights at normal displacement:
Armament: 205 tons, 2.2 %
Armour: 1,080 tons, 11.6 %
- Belts: 467 tons, 5.0
%
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 195 tons, 2.1 %
- Armour Deck: 390 tons, 4.2 %
- Conning Tower:
28 tons, 0.3 %
Machinery: 2,575 tons, 27.7 %
Hull, fittings & equipment: 3,623 tons, 39.0 %
Fuel, ammunition
& stores: 1,768 tons, 19.0 %
Miscellaneous weights: 40 tons, 0.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,290 lbs / 4,214 Kg = 90.2 x 5.9 " / 150 mm shells
or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 2.8 ft / 0.9 m
Roll period: 13.9
seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.64
Seaboat
quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.468
Length to Beam Ratio: 10.89 : 1
'Natural speed' for length: 24.50 kts
Power going to wave formation at top speed:
53 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern
overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.13 ft
/ 7.05 m
- Forecastle (30 %): 21.65 ft / 6.60 m
- Mid (50 %): 16.73 ft / 5.10 m
- Quarterdeck (15 %): 16.40 ft
/ 5.00 m (16.57 ft / 5.05 m before break)
- Stern: 16.40 ft / 5.00 m
- Average freeboard: 18.80 ft / 5.73 m
Ship
tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low =
better): 108.1 %
- Above water (accommodation/working, high = better): 114.3 %
Waterplane Area: 21,431 Square feet
or 1,991 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 100
lbs/sq ft or 487 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.35
- Overall:
1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
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