General Admiral Apraksin class light cruisers, laid down 1922
Length, 180.0 m x Beam,
16.7 m x Depth, 6.3 m 8974 tonnes normal displacement (7784 tonnes standard)
Main battery: 12 x 15.0-cm (4 x 3;
2 superfiring) Secondary battery: 12 x 10.0-cm (6 x 2) AA battery: 16 x 3.7-cm
Weight of broadside: 739 kg
12 TT, 53.0 cm in two sextuple mounts
Main belt, 7.5 cm; ends unarmored Armor deck, average 2.5 cm Conning
tower, 5.0 cm
Battery armor: Main, 7.5 cm / secondary, 2.5 cm AA, 2.5 cm shields
Aircraft - 2 Seaplanes,
1 Catapult
Maximum speed for 54141 shaft kw = 31.50 knots Approximate cruising radius, 9000 nm / 15 knots
Typical
complement: 461-599
Estimated cost, $8.473 million (£2.118 million)
Remarks:
Relative extent of
belt armor, 108 percent of 'typical' coverage.
Ship has slow, easy roll; a good, steady gun platform.
Good
seaboat; rides out heavy weather easily.
Distribution of weights: Percent normal displacement:
Armament
......................... 203 tonnes = 2 pct Armor, total ..................... 1198 tonnes = 13 pct
Belt 442
tonnes = 5 pct Deck 355 tonnes = 4 pct C.T. 18 tonnes = 0 pct Armament 382 tonnes = 4 pct
Machinery ........................
2461 tonnes = 27 pct Hull and fittings; equipment ..... 3557 tonnes = 40 pct Fuel, ammunition, stores ......... 1505
tonnes = 17 pct Miscellaneous weights ............ 50 tonnes = 1 pct ----- 8974 tonnes = 100 pct
Estimated
metacentric height, 0.7 m
Displacement summary:
Light ship: 7469 tonnes Standard displacement: 7784 tonnes
Normal service: 8974 tonnes Full load: 9890 tonnes
Loading submergence 1827 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.09
Shellfire
needed to sink: 4044 kg = 86.4 x 15.0-cm shells (Approximates weight of penetrating shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 1.3 (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, 0.61
Relative quality as a seaboat: 1.20
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Hull
form characteristics:
Block coefficient: 0.47 Sharpness coefficient: 0.31 Hull speed coefficient 'M' = 8.69
'Natural speed' for length = 24.3 knots Power going to wave formation at top speed: 53 percent
Estimated
hull characteristics and strength:
Relative underwater volume absorbed by magazines and engineering spaces: 107
percent
Relative accommodation and working space: 115 percent
Displacement factor: 116 percent (Displacement
relative to loading factors)
Relative cross-sectional hull strength: 0.97 (Structure weight per square metre
of hull surface: 501 kg)
Relative longitudinal hull strength: 1.30 (for 5.80 m average freeboard; freeboard
adjustment +1.28 m)
Relative composite hull strength: 1.00
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[Machine-readable
parameters: Spring Style v. 1.2.1]
590.40 x 54.78 x 20.66; 19.02 -- Dimensions 0.47 -- Block coefficient 1922
-- Year laid down 31.50 / 9000 / 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise 50 tons -- Miscellaneous
weights ++++++++++ 12 x 5.91; 4; 2 -- Main battery; turrets; superfiring : 12 x 3.94; 6 -- Secondary battery;
turrets : 16 x 1.46 -- Tertiary (QF/AA) battery Gun-shields : 0 -- No fourth (light) battery 12 /
0 / 20.87 -- TT / submerged / size ++++++++++ 2.95 / 0.00 / 0.00 / 0.00; 108 -- Belt armor; relative extent 0.98
/ 1.97 -- Deck / CT 2.95 / 0.98 / 0.98 / 0.00 -- Battery armor
(Note: For portability, values are stored in
Anglo-American units)
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