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Dneipr class gunboat
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Dneipr class river gunboat, laid down 1913
     Length, 45.0 m x Beam, 6.0 m x Depth, 1.8 m
          392 tonnes normal displacement (332 tonnes standard)
     Main battery:       1 x 12.2-cm
     Secondary battery:  2 x  4.5-cm
     QF battery:         6 x  1.3-cm
          Weight of broadside: 28 kg
     50 tons cargo/mines
     Main belt, 3.0 cm; bow and stern, 2.0 cm
     Upper belt, 3.0 cm
     Armor deck, average 1.0 cm
     Conning tower, 3.0 cm
     Battery armor:
          Main, 3.0 cm shields / secondary, 3.0 cm shields
          QF, 3.0 cm 
     Maximum speed for 635 shaft kw = 14.00 knots
          Approximate cruising radius, 3500 nm / 10 knots
     Typical complement: 44-57

                    Estimated cost, $99,000 (25,000)
          Remarks:
     Relative extent of belt armor, 60 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 roomy, with superior
     watertight subdivision.
     Cramped ship; poor crew accommodation, limited working space.
     Main deck QF guns subject to being washed down in a seaway.

          Distribution of weights:
                                                       Percent
                                                       normal
                                                    displacement:
          Armament .........................      8 tonnes =   2 pct
          Armor, total .....................     66 tonnes =  17 pct
               Belt                              43 tonnes =  11 pct
               Deck                              18 tonnes =   5 pct
               C.T.                               1 tonnes =   0 pct
               Armament                           3 tonnes =   1 pct
          Machinery ........................     37 tonnes =   9 pct
          Hull and fittings; equipment .....    159 tonnes =  40 pct
          Fuel, ammunition, stores .........     73 tonnes =  19 pct
          Miscellaneous weights ............     50 tonnes =  13 pct
                                              -----
                                                392 tonnes = 100 pct
          Estimated metacentric height, 0.1 m
     Displacement summary:
          Light ship:               319 tonnes
          Standard displacement:    332 tonnes
          Normal service:           392 tonnes
          Full load:                438 tonnes
          Loading submergence 234 tonnes/metre
     +++++++++++++++++++++++++

     Estimated overall survivability and seakeeping ability:
          Relative margin of stability: 1.01
          Shellfire needed to sink: 346 kg = 13.7 x 12.2-cm shells
               (Approximates weight of penetrating
               shell hits needed to sink ship,
               not counting critical hits)
          Torpedoes needed to sink: 0.7
               (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, 0.30
          Relative quality as a seaboat: 1.21
     +++++++++++++++++++++++++

     Hull form characteristics:
          Block coefficient: 0.80
          Sharpness coefficient: 0.46
          Hull speed coefficient 'M' = 6.16
          'Natural speed' for length = 12.1 knots
          Power going to wave formation
               at top speed: 57 percent

     Estimated hull characteristics and strength:
          Relative underwater volume absorbed by
               magazines and engineering spaces: 60 percent
          Relative accommodation and working space: 79 percent

          Displacement factor: 156 percent
               (Displacement relative to loading factors)

          Relative cross-sectional hull strength: 1.33
               (Structure weight per square
               metre of hull surface: 206 kg)
          Relative longitudinal hull strength: 2.59
               (for 2.22 m average freeboard;
               freeboard adjustment -0.20 m)
          Relative composite hull strength: 1.42
     +++++++++++++++++++++++++

[Machine-readable parameters: Spring Style v. 1.2.1]
147.60 x 19.68 x 5.90; 7.28 -- Dimensions
0.80 -- Block coefficient
1913 -- Year laid down
14.00 / 3500 / 10.00; Turbine, coal fired -- Speed / radius / cruise
50 tons -- Miscellaneous weights
++++++++++
1 x 4.80; 0 -- Main battery; turrets
  Central positioning of guns
  Gun-shields
   :
2 x 1.77; 0 -- Secondary battery; turrets
  Gun-shields
   :
6 x 0.51 -- Tertiary (QF/AA) battery
  Main deck battery
   :
0 -- No fourth (light) battery
0 -- No torpedo armament
++++++++++
1.18 / 0.79 / 1.18 / 0.00; 60 -- Belt armor; relative extent
0.39 / 1.18 -- Deck / CT
1.18 / 1.18 / 1.18 / 0.00 -- Battery armor

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

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


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