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Aircraft Carrier Canopus
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The Aircraft Carrier Canopus is being converted from a Collier.  It is expected to enter service in December 1921.

Canopus class Aircraft Carrier, laid down 1920
     Length, 160.0 m x Beam, 18.0 m x Depth, 6.0 m
          10976 tonnes normal displacement (9331 tonnes standard)
     Main battery:       4 x 13.0-cm (2 x 2)
     Secondary battery:  8 x 10.0-cm
     AA battery:        24 x  3.7-cm
          Weight of broadside: 250 kg
     Main belt, 10.0 cm; bow and stern, 5.0 cm
     Armor deck, average 10.0 cm
     Conning tower, 10.0 cm
     Battery armor:
          Main, 2.5 cm / secondary, 2.5 cm shields
          AA, 2.5 cm shields 
     Aircraft - 32 (16 Fighters, 12 Torpedo Bombers, 4 Recce)
     Maximum speed for 47417 shaft kw = 28.50 knots
          Approximate cruising radius, 10700 nm / 15 knots
     Typical complement: 536-697

                    Estimated cost, $6.487 million (£1.622 million)
          Remarks:
     Ship has slow, easy roll; a good, steady gun platform.
     Excellent seaboat; comfortable and able to fight her guns
     in the heaviest weather.
     Magazines and engineering spaces are roomy, with superior
     watertight subdivision.
     Ship is roomy, with superior accommodation and working space.

          Distribution of weights:
                                                       Percent
                                                       normal
                                                    displacement:
          Armament .........................     69 tonnes =   1 pct
          Armor, total .....................   2394 tonnes =  22 pct
               Belt                             638 tonnes =   6 pct
               Deck                            1657 tonnes =  15 pct
               C.T.                              42 tonnes =   0 pct
               Armament                          58 tonnes =   1 pct
          Machinery ........................   2222 tonnes =  20 pct
          Hull and fittings; equipment .....   3357 tonnes =  31 pct
          Fuel, ammunition, stores .........   1910 tonnes =  17 pct
          Miscellaneous weights ............   1024 tonnes =   9 pct
                                              -----
                                              10976 tonnes = 100 pct
          Estimated metacentric height, 1.0 m
     Displacement summary:
          Light ship:              9066 tonnes
          Standard displacement:   9331 tonnes
          Normal service:         10976 tonnes
          Full load:              12248 tonnes
          Loading submergence 2131 tonnes/metre
     +++++++++++++++++++++++++

     Estimated overall survivability and seakeeping ability:
          Relative margin of stability: 1.20
          Shellfire needed to sink: 7958 kg = 260.9 x 13.0-cm shells
               (Approximates weight of penetrating
               shell hits needed to sink ship,
               not counting critical hits)
          Torpedoes needed to sink: 2.0
               (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, 0.17
          Relative quality as a seaboat: 1.50
     +++++++++++++++++++++++++

     Hull form characteristics:
          Block coefficient: 0.63
          Sharpness coefficient: 0.39
          Hull speed coefficient 'M' = 7.22
          'Natural speed' for length = 22.9 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: 81 percent
          Relative accommodation and working space: 187 percent

          Displacement factor: 131 percent
               (Displacement relative to loading factors)

          Relative cross-sectional hull strength: 0.95
               (Structure weight per square
               metre of hull surface: 438 kg)
          Relative longitudinal hull strength: 1.65
               (for 7.07 m average freeboard;
               freeboard adjustment +2.37 m)
          Relative composite hull strength: 1.00
     +++++++++++++++++++++++++

[Machine-readable parameters: Spring Style v. 1.2.1]
524.80 x 59.04 x 19.68; 23.19 -- Dimensions
0.63 -- Block coefficient
1920 -- Year laid down
28.50 / 10700 / 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
1024 tons -- Miscellaneous weights
++++++++++
4 x 5.12; 2; 0 -- Main battery; turrets; superfiring
   :
8 x 3.94; 0 -- Secondary battery; turrets
  Gun-shields
   :
24 x 1.46 -- Tertiary (QF/AA) battery
  Gun-shields
   :
0 -- No fourth (light) battery
0 -- No torpedo armament
++++++++++
3.94 / 1.97 / 0.00 / 0.00; 100 -- Belt armor; relative extent
3.94 / 3.94 -- Deck / CT
0.98 / 0.98 / 0.98 / 0.00 -- Battery armor

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

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


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