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Admiral Lazarev Class Light Cruisers
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The Admiral Lazarev Class were the first modern cruiser in Russian Navy  service.

admlazarev.gif

Admiral Lazarev class light cruisers, laid down 1914
     Length, 163.2 m x Beam, 15.7 m x Depth, 6.2 m
          8491 tonnes normal displacement (7540 tonnes standard)
     Main battery:          4 x 15.0-cm (2 x 2)
     Secondary battery:  8 x 15.0-cm
     AA battery:             6 x  4.5-cm (6 x 1)
     Light battery:           6 x  1.3-cm (3 x 2)
          Weight of broadside: 571 kg
     12 TT, 53.0 cm
     Main belt, 9.0 cm; bow and stern, 3.0 cm
     Upper belt, 5.0 cm
     Armor deck, average 2.5 cm
     Conning tower, 10.0 cm
     Battery armor:
          Main, 7.5 cm / secondary, 7.5 cm
          AA, 2.5 cm shields 
     Maximum speed for 52695 shaft kw = 31.00 knots
          Approximate cruising radius, 5800 nm / 15 knots
     Typical complement: 442-575

                    Estimated cost, $3.904 million (£976,000)
          Remarks:
     Oil firing.
     Relative extent of belt armor, 119 percent of 'typical' coverage.
     Ship has slow, easy roll; a good, steady gun platform.
     Good seaboat; rides out heavy weather easily.
     Magazines and engineering spaces are cramped, with poor
     watertight subdivision.
     Roomy upper decks; superior accommodation and working space.
     Main deck secondary guns subject to being washed down
     in a seaway.

          Distribution of weights:
                                                       Percent
                                                       normal
                                                    displacement:
          Armament .........................    157 tonnes =   2 pct
          Armor, total .....................   1426 tonnes =  17 pct
               Belt                             868 tonnes =  10 pct
               Deck                             327 tonnes =   4 pct
               C.T.                              35 tonnes =   0 pct
               Armament                         197 tonnes =   2 pct
          Machinery ........................   2720 tonnes =  32 pct
          Hull and fittings; equipment .....   2912 tonnes =  34 pct
          Fuel, ammunition, stores .........   1225 tonnes =  14 pct
          Miscellaneous weights ............     50 tonnes =   1 pct
                                              -----
                                               8491 tonnes = 100 pct
          Estimated metacentric height, 0.8 m
     Displacement summary:
          Light ship:              7266 tonnes
          Standard displacement:   7540 tonnes
          Normal service:          8491 tonnes
          Full load:               9218 tonnes
          Loading submergence 1688 tonnes/metre
     +++++++++++++++++++++++++

     Estimated overall survivability and seakeeping ability:
          Relative margin of stability: 1.17
          Shellfire needed to sink: 3208 kg = 68.4 x 15.0-cm shells
               (Approximates weight of penetrating
               shell hits needed to sink ship,
               not counting critical hits)
          Torpedoes needed to sink: 1.0
               (Approximates number of 'typical'
               torpedo hits needed to sink ship)
          Relative steadiness as gun platform, 70 percent
               (50 percent is 'average')
          Relative rocking effect from firing to beam, 0.55
          Relative quality as a seaboat: 1.20
     +++++++++++++++++++++++++

     Hull form characteristics:
          Block coefficient: 0.53
          Sharpness coefficient: 0.34
          Hull speed coefficient 'M' = 8.02
          'Natural speed' for length = 23.1 knots
          Power going to wave formation
               at top speed: 58 percent

     Estimated hull characteristics and strength:
          Relative underwater volume absorbed by
               magazines and engineering spaces: 119 percent
          Relative accommodation and working space: 123 percent

          Displacement factor: 104 percent
               (Displacement relative to loading factors)

          Relative cross-sectional hull strength: 0.96
               (Structure weight per square
               metre of hull surface: 445 kg)
          Relative longitudinal hull strength: 1.45
               (for 5.89 m average freeboard;
               freeboard adjustment +1.42 m)
          Relative composite hull strength: 1.00
     +++++++++++++++++++++++++

[Machine-readable parameters: Spring Style v. 1.2.1]
535.30 x 51.50 x 20.34; 19.32 -- Dimensions
0.53 -- Block coefficient
1914 -- Year laid down
31.00 / 5800 / 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
50 tons -- Miscellaneous weights
++++++++++
4 x 5.91; 2; 0 -- Main battery; turrets; superfiring
   :
8 x 5.91; 0 -- Secondary battery; turrets
  Main deck battery
   :
6 x 1.77 -- Tertiary (QF/AA) battery
  Gun-shields
   :
6 x 0.51 -- Fourth (light) battery
12 / 0 / 20.87 -- TT / submerged / size
++++++++++
3.54 / 1.18 / 1.97 / 0.00; 119 -- Belt armor; relative extent
0.98 / 3.94 -- Deck / CT
2.95 / 2.95 / 0.98 / 0.00 -- Battery armor

     (Note: For portability, values are stored in Anglo-American units)

     +++++++++++++++++++++++++++++++++++++++++++++++++++++++


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