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Admiral Ushakov class light cruisers
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These light cruisers introduce a new gun, the 100mm/56, used in the secondary battery in six twin turrets.  The names of this class are Admiral Ushakov, Admiral Essen, Admiral Spiridonov, and Admiral Jones.

ushakov.gif

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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