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
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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
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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
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[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
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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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