Imperator Petr Veliki class battleships, laid down 1918
Length, 220.0 m x Beam, 32.6 m x Depth, 9.2 m
39921 tonnes normal displacement (38088 tonnes standard)
Main battery: 12 x 38.1-cm (3 x 4; 1 superfiring)
Secondary battery: 24 x 13.0-cm
AA battery: 8
x 10.0-cm
Light battery: 24 x 3.7-cm
Weight of broadside: 10065 kg
Main belt, 36.0 cm; ends unarmored
Torpedo bulkhead, 2.5 cm
Armor deck, average 12.0 cm
Conning tower, 40.0 cm
Battery armor:
Main, 40.0 cm / secondary,
8.0 cm
AA, 2.5 cm shields / light guns, 2.5 cm shields
Aircraft - 3 Seaplanes, 1 Catapult
Maximum speed for 57006 shaft kw = 25.00 knots
Approximate cruising radius, 5000 nm / 15 knots
Typical complement: 1412-1836
Estimated cost, $31.610 million (£7.903 million)
Remarks:
Superfiring turret is aft.
Oil firing.
Relative extent of belt armor, 94 percent of 'typical' coverage.
Ship has slow, easy roll; a good, steady gun platform.
Good seaboat; rides out heavy weather easily.
Ship is roomy, with superior accommodation and working space.
Main deck secondary guns subject to being washed down
in a seaway.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 2768 tonnes =
7 pct
Armor, total ..................... 13290 tonnes =
33 pct
Belt
3334 tonnes = 8 pct
Torpedo
bulkhead 526 tonnes =
1 pct
Deck
4789 tonnes = 12 pct
C.T.
398 tonnes = 1 pct
Armament
4243 tonnes = 11 pct
Machinery ........................ 2756 tonnes =
7 pct
Hull and fittings; equipment ..... 16555 tonnes =
41 pct
Fuel, ammunition, stores ......... 4477 tonnes
= 11 pct
Miscellaneous weights ............
75 tonnes = 0 pct
-----
39921 tonnes = 100 pct
Estimated metacentric height, 1.8 m
Displacement summary:
Light ship:
35444 tonnes
Standard displacement: 38088 tonnes
Normal service: 39921 tonnes
Full load: 41228 tonnes
Loading submergence 5135 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.03
Shellfire needed to sink: 17446 kg = 22.7 x 38.1-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not
counting critical hits)
Torpedoes needed to sink: 5.1
(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, 0.74
Relative quality as a seaboat: 1.20
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Hull form characteristics:
Block coefficient: 0.60
Sharpness coefficient: 0.41
Hull speed coefficient 'M' = 6.46
'Natural speed' for length = 26.9 knots
Power going to wave formation
at top speed: 46 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 94 percent
Relative accommodation and working space: 147 percent
Displacement factor: 98 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.98
(Structure weight per square
metre
of hull surface: 1089 kg)
Relative longitudinal hull strength: 1.23
(for 6.06 m average freeboard;
freeboard
adjustment -0.03 m)
Relative composite hull strength: 1.00
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[Machine-readable parameters: Spring Style v. 1.2.1]
721.60 x 106.93 x 30.18; 19.88 -- Dimensions
0.60 -- Block coefficient
1918 -- Year laid down
25.00 / 5000
/ 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
75 tons -- Miscellaneous weights
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12
x 15.00; 3; 1 -- Main battery; turrets; superfiring
Superfiring turret aft only
:
24 x 5.12;
0 -- Secondary battery; turrets
Main deck battery
:
8 x 3.94 -- Tertiary (QF/AA) battery
Gun-shields
:
24 x 1.46 -- Fourth (light) battery
0 -- No torpedo armament
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14.17
/ 0.00 / 0.00 / 1.00; 94 -- Belt armor; relative extent
4.72 / 15.75 -- Deck / CT
15.75 / 3.15 / 0.98 / 0.98 -- Battery
armor
(Note: For portability, values are stored in Anglo-American units)
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