[SIZE=3]Akbar Class Battleship[/SIZE]
Emperor Jalal ud Din Akbar, B-5, laid down 1924
Emperor Nur ud Din Jahangir, B-6, laid down 1924
As refitted, 1942
Enter ship name, Enter country Enter ship type laid down 1936
Displacement:
27,946 t light; 29,226 t standard; 31,039 t normal; 32,489 t full load
Dimensions: Length overall / water x beam x draught
709.08 ft / 695.54 ft x 100.07 ft x 28.38 ft (normal load)
216.13 m / 212.00 m x 30.50 m x 8.65 m
Armament:
8 - 13.78" / 350 mm guns (2x4 guns), 1,308.20lbs / 593.39kg shells, 1936 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
8 - 4.92" / 125 mm guns (4x2 guns), 59.59lbs / 27.03kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts - superfiring
8 - 4.92" / 125 mm guns (4x2 guns), 59.59lbs / 27.03kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
24 - 2.24" / 57.0 mm guns (12x2 guns), 5.65lbs / 2.56kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
48 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1936 Model
Machine guns in deck mounts
on side, evenly spread, 12 raised mounts
Weight of broadside 11,578 lbs / 5,251 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.2" / 360 mm 419.95 ft / 128.00 m 12.01 ft / 3.66 m
Ends: Unarmoured
Upper: 1.57" / 40 mm 419.95 ft / 128.00 m 8.01 ft / 2.44 m
Main Belt covers 93 % of normal length
- Torpedo Bulkhead:
1.57" / 40 mm 452.10 ft / 137.80 m 26.21 ft / 7.99 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 9.84" / 250 mm 15.7" / 400 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 1.18" / 30 mm
3rd: 1.18" / 30 mm 0.79" / 20 mm 1.18" / 30 mm
4th: 0.79" / 20 mm 0.39" / 10 mm -
5th: 0.39" / 10 mm - -
- Armour deck: 5.12" / 130 mm, Conning tower: 15.75" / 400 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 116,000 shp / 86,536 Kw = 29.02 kts
Range 7,310nm at 15.00 kts or 12,000 nm at 12.00 kts
Bunker at max displacement = 3,263 tons
Complement:
1,168 - 1,519
Cost:
£13.970 million / $55.879 million
Distribution of weights at normal displacement:
Armament: 1,447 tons, 4.7 %
Armour: 11,003 tons, 35.4 %
- Belts: 3,372 tons, 10.9 %
- Torpedo bulkhead: 691 tons, 2.2 %
- Armament: 2,006 tons, 6.5 %
- Armour Deck: 4,599 tons, 14.8 %
- Conning Tower: 335 tons, 1.1 %
Machinery: 3,255 tons, 10.5 %
Hull, fittings & equipment: 12,003 tons, 38.7 %
Fuel, ammunition & stores: 3,092 tons, 10.0 %
Miscellaneous weights: 239 tons, 0.8 %
-50 t: Flag facilities
-150 t: Electronics and fire control
-39 t: Weight reserve
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,080 lbs / 19,541 Kg = 32.9 x 13.8 " / 350 mm shells or 7.0 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 5.8 ft / 1.8 m
Roll period: 17.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 1.08
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.550
Length to Beam Ratio: 6.95 : 1
'Natural speed' for length: 26.37 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: -3.28 ft / -1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.04 ft / 8.85 m
- Forecastle (20 %): 22.80 ft / 6.95 m (19.85 ft / 6.05 m aft of break)
- Mid (50 %): 19.85 ft / 6.05 m
- Quarterdeck (15 %): 19.85 ft / 6.05 m
- Stern: 19.85 ft / 6.05 m
- Average freeboard: 20.94 ft / 6.38 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88.0 %
- Above water (accommodation/working, high = better): 157.2 %
Waterplane Area: 48,573 Square feet or 4,513 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 180 lbs/sq ft or 878 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.38
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
As refitted,1936/8
A 50% modernization of the Akbar Class staring with Akbar in 1936 and Janangir in 1938.
Displacement:
27,955 t light; 29,225 t standard; 31,039 t normal; 32,490 t full load
Dimensions: Length overall / water x beam x draught
709.08 ft / 695.54 ft x 100.07 ft x 28.38 ft (normal load)
216.13 m / 212.00 m x 30.50 m x 8.65 m
Armament:
8 - 13.78" / 350 mm guns (2x4 guns), 1,308.20lbs / 593.39kg shells, 1924 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
8 - 4.92" / 125 mm guns (4x2 guns), 59.59lbs / 27.03kg shells, 1924 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts - superfiring
8 - 4.92" / 125 mm guns (4x2 guns), 59.59lbs / 27.03kg shells, 1924 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
24 - 1.38" / 35.0 mm guns (12x2 guns), 1.31lbs / 0.59kg shells, 1924 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 8 raised mounts
24 - 0.59" / 15.0 mm guns (6x4 guns), 0.10lbs / 0.05kg shells, 1924 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 11,453 lbs / 5,195 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.2" / 360 mm 419.95 ft / 128.00 m 12.01 ft / 3.66 m
Ends: Unarmoured
Upper: 1.57" / 40 mm 419.95 ft / 128.00 m 8.01 ft / 2.44 m
Main Belt covers 93 % of normal length
- Torpedo Bulkhead:
1.57" / 40 mm 452.10 ft / 137.80 m 26.21 ft / 7.99 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 9.84" / 250 mm 15.7" / 400 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 1.18" / 30 mm
3rd: 1.18" / 30 mm - -
4th: 0.79" / 20 mm - -
5th: 0.79" / 20 mm - -
- Armour deck: 5.12" / 130 mm, Conning tower: 15.75" / 400 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 116,000 shp / 86,536 Kw = 29.02 kts
Range 12,000nm at 12.00 kts (Bunkerage = 3,265 tons)
Complement:
1,168 - 1,519
Cost:
£8.150 million / $32.599 million
Distribution of weights at normal displacement:
Armament: 1,432 tons, 4.6 %
Armour: 10,988 tons, 35.4 %
- Belts: 3,372 tons, 10.9 %
- Torpedo bulkhead: 691 tons, 2.2 %
- Armament: 1,992 tons, 6.4 %
- Armour Deck: 4,599 tons, 14.8 %
- Conning Tower: 335 tons, 1.1 %
Machinery: 3,255 tons, 10.5 %
Hull, fittings & equipment: 11,984 tons, 38.6 %
Fuel, ammunition & stores: 3,083 tons, 9.9 %
Miscellaneous weights: 297 tons, 1.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
34,527 lbs / 15,661 Kg = 26.4 x 13.8 " / 350 mm shells or 5.1 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 5.8 ft / 1.8 m
Roll period: 17.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 1.08
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.550
Length to Beam Ratio: 6.95 : 1
'Natural speed' for length: 26.37 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: -3.28 ft / -1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.04 ft / 8.85 m
- Forecastle (20 %): 22.80 ft / 6.95 m (19.85 ft / 6.05 m aft of break)
- Mid (50 %): 19.85 ft / 6.05 m
- Quarterdeck (15 %): 19.85 ft / 6.05 m
- Stern: 19.85 ft / 6.05 m
- Average freeboard: 20.94 ft / 6.38 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 87.8 %
- Above water (accommodation/working, high = better): 157.2 %
Waterplane Area: 48,573 Square feet or 4,513 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 180 lbs/sq ft or 876 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.38
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
As Built, 1924
Length, 204.0 m x Beam, 30.5 m x Depth, 8.7 m
29962 tonnes normal displacement (28009 tonnes standard)
Main battery: 8 x 35.0-cm (2 x 4)
Secondary battery: 8 x 15.0-cm (4 x 2; 2 superfiring)
AA battery: 8 x 10.5-cm
Light battery: 8 x 3.5-cm
Weight of broadside: 5265 kg
Main belt, 40.0 cm; ends unarmored
Torpedo bulkhead, 2.5 cm
Armor deck, average 10.0 cm
Conning tower, 36.0 cm
Battery armor:
Main, 40.0 cm / secondary, 7.5 cm
AA, 2.5 cm shields / light guns, 2.5 cm shields
Maximum speed for 75013 shaft kw = 28.01 knots
Approximate cruising radius, 12000 nm / 12 knots
Typical complement: 1139-1480
Estimated cost, $32.210 million (£8.053 million)
Remarks:
Relative extent of belt armor, 93 percent of 'typical' coverage.
Ship has slow, easy roll; a good, steady gun platform.
Ship is roomy, with superior accommodation and working space.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 1448 tonnes = 5 pct
Armor, total ..................... 9779 tonnes = 33 pct
Belt 3283 tonnes = 11 pct
Torpedo bulkhead 451 tonnes = 2 pct
Deck 3264 tonnes = 11 pct
C.T. 296 tonnes = 1 pct
Armament 2485 tonnes = 8 pct
Machinery ........................ 3311 tonnes = 11 pct
Hull and fittings; equipment ..... 11831 tonnes = 39 pct
Fuel, ammunition, stores ......... 3517 tonnes = 12 pct
Miscellaneous weights ............ 75 tonnes = 0 pct
-----
29962 tonnes = 100 pct
Estimated metacentric height, 1.7 m
Displacement summary:
Light ship: 26444 tonnes
Standard displacement: 28009 tonnes
Normal service: 29962 tonnes
Full load: 31404 tonnes
Loading submergence 4200 tonnes/metre
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Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.05
Shellfire needed to sink: 13995 kg = 299.0 x 15.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 4.3
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 71 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.52
Relative quality as a seaboat: 1.05
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Hull form characteristics:
Block coefficient: 0.55
Sharpness coefficient: 0.40
Hull speed coefficient 'M' = 6.59
'Natural speed' for length = 25.9 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: 92 percent
Relative accommodation and working space: 150 percent
Displacement factor: 108 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.98
(Structure weight per square
metre of hull surface: 922 kg)
Relative longitudinal hull strength: 1.41
(for 6.10 m average freeboard;
freeboard adjustment +0.35 m)
Relative composite hull strength: 1.01
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[Machine-readable parameters: Spring Style v. 1.2.1]
669.00 x 100.00 x 28.50; 20.01 -- Dimensions
0.55 -- Block coefficient
1924 -- Year laid down
28.01 / 12000 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
75 tons -- Miscellaneous weights
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8 x 5.91; 4; 2 -- Main battery; turrets; superfiring
:
8 x 13.78; 2 -- Secondary battery; turrets
:
8 x 4.13 -- Tertiary (QF/AA) battery
Gun-shields
:
8 x 1.38 -- Fourth (light) battery
0 -- No torpedo armament
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15.75 / 0.00 / 0.00 / 0.98; 93 -- Belt armor; relative extent
3.94 / 14.17 -- Deck / CT
2.95 / 15.75 / 0.98 / 0.98 -- Battery armor
(Note: For portability, values are stored in Anglo-American units)
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