Difference between revisions of "IJN Ikoma"

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{{Specs-Card|code=jp_armoredcruiser_ikoma}}
+
{{Specs-Card
 +
|code=jp_armoredcruiser_ikoma
 +
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg}}
 +
}}
  
 
== Description ==
 
== Description ==
 
<!-- ''In the first part of the description, cover the history of the ship's creation and military application. In the second part, tell the reader about using this ship in the game. Add a screenshot: if a beginner player has a hard time remembering vehicles by name, a picture will help them identify the ship in question.'' -->
 
<!-- ''In the first part of the description, cover the history of the ship's creation and military application. In the second part, tell the reader about using this ship in the game. Add a screenshot: if a beginner player has a hard time remembering vehicles by name, a picture will help them identify the ship in question.'' -->
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
 
{{Break}}
 
 
The '''{{Specs|name}}''' is a rank {{Specs|rank}} Japanese battlecruiser {{Battle-rating}}. It was introduced in [[Update "New Power"]].
 
The '''{{Specs|name}}''' is a rank {{Specs|rank}} Japanese battlecruiser {{Battle-rating}}. It was introduced in [[Update "New Power"]].
  
 
== General info ==
 
== General info ==
 
=== Survivability and armour ===
 
=== Survivability and armour ===
<!-- ''Talk about the vehicle's armour. Note the most well-defended and most vulnerable zones, e.g. the ammo magazine. Evaluate the composition of components and assemblies responsible for movement and manoeuvrability. Evaluate the survivability of the primary and secondary armaments separately. Don't forget to mention the size of the crew, which plays an important role in fleet mechanics. Save tips on preserving survivability for the "Usage in battles" section. If necessary, use a graphical template to show the most well-protected or most vulnerable points in the armour.'' -->The Ikoma has a typical armour scheme for an armoured cruiser its era - thick armour protecting the vitals - a waterline belt of 178 mm of rolled cemented (face hardened) armour in the middle of the ship, and a 127mm thick rolled cemented citadel above that protecting the casemated 6" guns, which themselves have 152mm rolled cemented gunshields. The corners of the citadel are also 152 mm rolled cemented.
+
{{Specs-Fleet-Armour}}
 +
<!-- ''Talk about the vehicle's armour. Note the most well-defended and most vulnerable zones, e.g. the ammo magazine. Evaluate the composition of components and assemblies responsible for movement and manoeuvrability. Evaluate the survivability of the primary and secondary armaments separately. Don't forget to mention the size of the crew, which plays an important role in fleet mechanics. Save tips on preserving survivability for the "Usage in battles" section. If necessary, use a graphical template to show the most well-protected or most vulnerable points in the armour.'' -->
 +
The Ikoma has a typical armour scheme for an armoured cruiser of its era - thick armour protecting the vitals - a waterline belt of 178 mm of rolled cemented (face hardened) armour in the middle of the ship, and a 127 mm thick rolled cemented citadel above that protecting the casemated 6" guns, which themselves have 152 mm rolled cemented gunshields. The corners of the citadel are also 152 mm rolled cemented.
  
The main turrets and barbettes under them are 178 mm of rolled cemented, with 25mm rolled homogenous roofs. The 4.7" guns have 80mm rolled cemented gunshields.
+
The main turrets and barbettes under them are 178 mm of rolled cemented, with 25 mm rolled homogenous roofs. The 4.7" guns have 80 mm rolled cemented gunshields.
  
The waterline fore- and aft of the main belt has a thinner belt of 102mm cemented, conning towers are 203mm rolled cemented at the front, and 152mm at the rear, with 38mm rolled homogenous roofs.
+
The waterline fore and aft of the main belt has a thinner belt of 102 mm cemented, conning towers are 203 mm rolled cemented at the front, and 152 mm at the rear, with 38 mm rolled homogenous roofs.
  
There are 3 decks of 38mm rolled homogeneous armour - the top 2 are horizontal, the bottom one has a "step" in it allowing a higher headroom in the engine rooms.
+
There are 3 decks of 38 mm rolled homogeneous armour - the top 2 are horizontal, the bottom one has a "step" in it allowing a higher headroom in the engine rooms.
 
 
The 2 magazines are each fully enclosed by 38mm rolled homogenous plate.
 
 
 
Lastly there are 25mm rolled homogeneous bulkheads covering the gap between the 2 main barbettes and the citadel fore and aft.
 
  
 +
The 2 magazines are each fully enclosed by 38 mm rolled homogenous plate.
 +
Lastly there are 25 mm rolled homogeneous bulkheads covering the gap between the 2 main barbettes and the citadel fore and aft.
 
Coal bunkers line the unarmoured sides of the engine rooms.
 
Coal bunkers line the unarmoured sides of the engine rooms.
  
 
By the standards of later times it is a complicated scheme, however it gives comprehensive protection against 6-8" guns of WW2 era cruisers.
 
By the standards of later times it is a complicated scheme, however it gives comprehensive protection against 6-8" guns of WW2 era cruisers.
 
 
The crew is 884 men, which is quite substantial, and they are well protected.
 
The crew is 884 men, which is quite substantial, and they are well protected.
  
''Talk about the vehicle's armour. Note the most well-defended and most vulnerable zones, e.g. the ammo magazine. Evaluate the composition of components and assemblies responsible for movement and manoeuvrability. Evaluate the survivability of the primary and secondary armaments separately. Don't forget to mention the size of the crew, which plays an important role in fleet mechanics. Save tips on preserving survivability for the "Usage in battles" section. If necessary, use a graphical template to show the most well-protected or most vulnerable points in the armour.''
+
=== Mobility ===
 +
{{Specs-Fleet-Mobility}}
 +
<!-- ''Write about the ship's mobility. Evaluate its power and manoeuvrability, rudder rerouting speed, stopping speed at full tilt, with its maximum forward and reverse speed.'' -->
  
=== Mobility ===
+
{{NavalMobility}}
<!-- ''Write about the ship's mobility. Evaluate its power and manoeuvrability, rudder rerouting speed, stopping speed at full tilt, with its maximum forward and reverse speed.'' -->The ship is extremely slow, and not very maneuverable.  Acceleration and deceleration rates are not good, and it takes a considerable time to start turning.
 
  
''Write about the ship's mobility. Evaluate its power and manoeuvrability, rudder rerouting speed, stopping speed at full tilt, with its maximum forward and reverse speed.''
+
The ship is extremely slow, and not very manoeuvrable. Acceleration and deceleration rates are not good, and it takes a considerable time to start turning.
  
{{NavalMobility}}
+
=== Modifications and economy ===
 +
{{Specs-Economy}}
  
 
== Armament ==
 
== Armament ==
 +
{{Specs-Fleet-Armaments}}
 
=== Primary armament ===
 
=== Primary armament ===
 +
{{Specs-Fleet-Primary}}
 
<!-- ''Provide information about the characteristics of the primary armament. Evaluate their efficacy in battle based on their reload speed, ballistics and the capacity of their shells. Add a link to the main article about the weapon: <code><nowiki>{{main|Weapon name (calibre)}}</nowiki></code>. Broadly describe the ammunition available for the primary armament, and provide recommendations on how to use it and which ammunition to choose.'' -->
 
<!-- ''Provide information about the characteristics of the primary armament. Evaluate their efficacy in battle based on their reload speed, ballistics and the capacity of their shells. Add a link to the main article about the weapon: <code><nowiki>{{main|Weapon name (calibre)}}</nowiki></code>. Broadly describe the ammunition available for the primary armament, and provide recommendations on how to use it and which ammunition to choose.'' -->
 
{{main|12-inch/45 Vickers (305 mm)}}
 
{{main|12-inch/45 Vickers (305 mm)}}
Line 44: Line 48:
  
 
=== Secondary armament ===
 
=== Secondary armament ===
 +
{{Specs-Fleet-Secondary}}
 
<!-- ''Some ships are fitted with weapons of various calibres. Secondary armaments are defined as weapons chosen with the control <code>Select secondary weapon</code>. Evaluate the secondary armaments and give advice on how to use them. Describe the ammunition available for the secondary armament. Provide recommendations on how to use them and which ammunition to choose. Remember that any anti-air armament, even heavy calibre weapons, belong in the next section. If there is no secondary armament, remove this section.'' -->
 
<!-- ''Some ships are fitted with weapons of various calibres. Secondary armaments are defined as weapons chosen with the control <code>Select secondary weapon</code>. Evaluate the secondary armaments and give advice on how to use them. Describe the ammunition available for the secondary armament. Provide recommendations on how to use them and which ammunition to choose. Remember that any anti-air armament, even heavy calibre weapons, belong in the next section. If there is no secondary armament, remove this section.'' -->
 
{{main|6-inch/45 Type 41 (152 mm)|4,7-inch/40 Armstrong (120 mm)}}
 
{{main|6-inch/45 Type 41 (152 mm)|4,7-inch/40 Armstrong (120 mm)}}
Line 50: Line 55:
  
 
=== Anti-aircraft armament ===
 
=== Anti-aircraft armament ===
 +
{{Specs-Fleet-AA}}
 
<!-- ''An important part of the ship's armament responsible for air defence. Anti-aircraft armament is defined by the weapon chosen with the control <code>Select anti-aircraft weapons</code>. Talk about the ship's anti-air cannons and machine guns, the number of guns and their positions, their effective range, and about their overall effectiveness – including against surface targets. If there are no anti-aircraft armaments, remove this section.'' -->
 
<!-- ''An important part of the ship's armament responsible for air defence. Anti-aircraft armament is defined by the weapon chosen with the control <code>Select anti-aircraft weapons</code>. Talk about the ship's anti-air cannons and machine guns, the number of guns and their positions, their effective range, and about their overall effectiveness – including against surface targets. If there are no anti-aircraft armaments, remove this section.'' -->
 
{{main|3-inch/40 Type 41 (76 mm)}}
 
{{main|3-inch/40 Type 41 (76 mm)}}
Line 55: Line 61:
 
''An important part of the ship's armament responsible for air defence. Anti-aircraft armament is defined by the weapon chosen with the control <code>Select anti-aircraft weapons</code>. Talk about the ship's anti-air cannons and machine guns, the number of guns and their positions, their effective range, and about their overall effectiveness – including against surface targets. If there are no anti-aircraft armaments, remove this section.''
 
''An important part of the ship's armament responsible for air defence. Anti-aircraft armament is defined by the weapon chosen with the control <code>Select anti-aircraft weapons</code>. Talk about the ship's anti-air cannons and machine guns, the number of guns and their positions, their effective range, and about their overall effectiveness – including against surface targets. If there are no anti-aircraft armaments, remove this section.''
  
=== Torpedo armament ===
+
=== Additional armament ===
<!-- ''Torpedo launchers are standard equipment on many ships and boats. Torpedoes are a significant means of defeating an opponent. Evaluate the position of the torpedo launchers, discuss the ammunition available, firing specifics such as dead zones, features of the torpedoes themselves, etc. If there is no torpedo armament, remove this section.'' -->
+
{{Specs-Fleet-Additional}}
{{main|21 inch Type 43 (1910) (533 mm)}}
+
<!-- ''Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes. If there is no additional armament, remove this section.'' -->
 +
{{main|21 inch Type 43 (1910) (533 mm)|18 inch Type 38 No.2 B (450 mm)}}
  
''Torpedo launchers are standard equipment on many ships and boats. Torpedoes are a significant means of defeating an opponent. Evaluate the position of the torpedo launchers, discuss the ammunition available, firing specifics such as dead zones, features of the torpedoes themselves, etc. If there is no torpedo armament, remove this section.''
+
The [[21 inch Type 43 (1910) (533 mm)|21 inch Type 43 (1910)]] torpedo is a good weapon by the standards of 1910 when it was introduced. It carries a 130 kg Shimose warhead (143kg TNT equivalent) to a range of 8km at 50kph. The warhead is small by later standards, and not likely to knock out a destroyer with one hit, let alone anything larger.
 +
 
 +
The Ikoma carries 2 fixed tubes - 1 facing to each broadside, and 17 reloads. The fixed tubes are located under the forward main turret, and are difficult to use since they are aimed by manoeuvring the ship - which is not easy to do as already noted.
 +
 
 +
The limitations are such that not carrying any torpedoes is a good choice - the SL you save is greater than any reward you might get.
  
 
== Usage in battles ==
 
== Usage in battles ==
<!-- ''Describe the technique of using this ship, the characteristics of her use in a team and tips on strategy. Abstain from writing an entire guide – don't try to provide a single point of view, but give the reader food for thought. Talk about the most dangerous opponents for this vehicle and provide recommendations on fighting them. If necessary, note the specifics of playing with this vehicle in various modes (AB, RB, SB).'' -->The Ikoma is classed as a "battlecruiser" in War Thunder, probably because it was designated a battlecruiser by the Japanese from 1912. However it is too slow and unmaneuverable to be used as a "fast battleship" as battlecruisers are often considered
+
<!-- ''Describe the technique of using this ship, the characteristics of her use in a team and tips on strategy. Abstain from writing an entire guide – don't try to provide a single point of view, but give the reader food for thought. Talk about the most dangerous opponents for this vehicle and provide recommendations on fighting them. If necessary, note the specifics of playing with this vehicle in various modes (AB, RB, SB).'' -->
 
+
The Ikoma is classed as a "battlecruiser" in War Thunder, probably because it was designated a battlecruiser by the Japanese from 1912. However it is too slow and unmanoeuvrable to be used as a "fast battleship" as battlecruisers are often considered.
It is better to consider it as the armoured cruiser it was designed as.  There is no real modern counterpart to "armoured cruiser", so it is probably simplest to think of it as a slow heavy cruiser.  In some respects it is comparable to the Deutschland class "Panzerschiff" (eg the Graff Spee), especially in terms of the main armament being a small number of heavy guns.  It can be played in a similar manner - mostly trying to "camp" somewhere protected from torpedoes and using the small number of heavy guns to score damaging hits on easy targets.
 
  
The slow rate of fire and small number of the main guns make them difficult to use against fast moving maneuvering targets - they are best used against large targets that lack maneuverability such as heavy cruisers otr larger. Light cruisers, destroyers, and smaller vessels can be attacked by controlling the secondary 6" and 4.7" guns - there are 6 of each on each broadside and they can make short work of smaller ships or boats.
+
It is better to consider it as the armoured cruiser it was designed as. There is no real modern counterpart to "armoured cruiser", so it is probably simplest to think of it as a slow heavy cruiser. In some respects it is comparable to the Deutschland class "Panzerschiff" (eg the [[Admiral Graf Spee]]), especially in terms of the main armament being a small number of heavy guns. It can be played in a similar manner - mostly trying to "camp" somewhere protected from torpedoes and using the small number of heavy guns to score damaging hits on easy targets.
  
It is possible to manage the fire of the 2 main turrets so that they each fire separately at approximately equal intervals. This provides more opportunity to correct range, and also accurate tracking of a target that is trying to maneuver to avoid the heavy shells.
+
The slow rate of fire and small number of the main guns make them difficult to use against fast moving manoeuvring targets - they are best used against large targets that lack manoeuvrability such as heavy cruisers or larger. Light cruisers, destroyers, and smaller vessels can be attacked by controlling the secondary 6" and 4.7" guns - there are 6 of each on each broadside and they can make short work of smaller ships or boats.
  
It is often impossible to dodge torpedoes due to the sluggish maneuverability, so using islands as a shield from torpedoes is recommended where they are available.
+
It is possible to manage the fire of the 2 main turrets so that they each fire separately at approximately equal intervals. This provides more opportunity to correct range, and also accurate tracking of a target that is trying to manoeuvre to avoid the heavy shells.
  
There is no effective AA armament, and aircraft can easily come down to mast height to accurately deliver bombs, rockets or torpedoes.  You can only hope the rest of your team has enough AA to provide some protection. The 3 armoured decks can absorb a lot of punishment from smaller bombs, but any armour piercing bombs, or anything from 1000lb/500kg upwards will cause significant damage.  At this BR heavier bombs such as 1800kg, 4000lb and 5000kg are common loads, and can destroy the ship with 1 or 2 hits.
+
It is often impossible to dodge torpedoes due to the sluggish manoeuvrability, so using islands as a shield from torpedoes is recommended where they are available.
  
''Describe the technique of using this ship, the characteristics of her use in a team and tips on strategy. Abstain from writing an entire guide – don't try to provide a single point of view, but give the reader food for thought. Talk about the most dangerous opponents for this vehicle and provide recommendations on fighting them. If necessary, note the specifics of playing with this vehicle in various modes (AB, RB, SB).''
+
There is no effective AA armament, and aircraft can easily come down to mast height to accurately deliver bombs, rockets or torpedoes. You can only hope the rest of your team has enough AA to provide some protection. The 3 armoured decks can absorb a lot of punishment from smaller bombs, but any armour piercing bombs, or anything from 1,000 lb/500 kg upwards will cause significant damage. At this BR, heavier bombs such as 1,800 kg, 4,000 lb and 5,000 kg are common loads, and can destroy the ship with 1 or 2 hits.
  
=== Modules ===
+
Backups for this ship cost only 20 GE, so it is worth considering buying them rather than using universal backups - you should always use backups of some variety when grinding through the various modules.
{| class="wikitable"
 
! Tier
 
! Seakeeping
 
! colspan="2" | Unsinkability
 
! colspan="3" | Firepower
 
|-
 
| I
 
| Dry-Docking
 
| Tool Set
 
|
 
| Anti-Air Armament Targeting
 
| 12-inch APC
 
| 6-inch APC
 
|-
 
| II
 
| Rudder Replacement
 
| Fire Protection System
 
|
 
| Auxiliary Armament Targeting
 
|
 
|
 
|-
 
| III
 
| Propeller Replacement
 
| Shrapnel Protection
 
| Ventilation
 
| Primary Armament Targeting
 
| Improved Rangefinder
 
|
 
|-
 
| IV
 
| Engine Maintenance
 
| New Pumps
 
| Ammo Wetting
 
|
 
|
 
|
 
|-
 
|}
 
  
 
=== Pros and cons ===
 
=== Pros and cons ===
 
<!-- ''Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".'' -->
 
<!-- ''Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".'' -->
''Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".''
 
  
 
'''Pros:'''
 
'''Pros:'''
  
* powerful 12" main armament can wreck anything less than a battleship with a few hits;
+
* Powerful 12" main armament can wreck anything less than a battleship with a few hits;
* heavy secondary armament of 6" and 4.7" guns is sufficient to destroy destroyers and smaller when controlled by the player;
+
* Heavy secondary armament of 6" and 4.7" guns is sufficient to take out destroyers and smaller vessels when controlled by the player;
* heavy armour absorbs most damage from enemy guns and small-medium bombs.
+
* Heavy armour absorbs most damage from enemy guns and small-medium bombs;
 
+
* Backups cost only 20 GE.
*
 
  
 
'''Cons:'''
 
'''Cons:'''
  
* slow, and very slow to turn or accelerate/decelerate - makes dodging torpedoes difficult;
+
* Slow, and very slow to turn or accelerate/decelerate - makes dodging torpedoes difficult;
* only 4 of the 12" guns with a very slow rate of fire (30 second reload when maxed) makes accurate shooting difficult against moving targets;
+
* Only 4 of the 12" guns with a very slow rate of fire (30 second reload when maxed) makes accurate shooting difficult against moving targets;
* no effective AA means opposing aircraft can press home attacks to minimum range and maximum accuracy.
+
* No effective AA means opposing aircraft can press home attacks to minimum range and maximum accuracy.
 
 
*
 
  
 
== History ==
 
== History ==
<!-- ''Describe the history of the creation and combat usage of the ship in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the ship and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Ship-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the ship's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->The Ikoma was the 2nd of the 2-ship Tsukuba class of armoured cruisers built by Japan. They were ordered as a result of the loss of 2 pre-dreadnought battleships to mines early in the Russo-Japanese War of 1904-1905, and were fairly standard armoured cruisers of the era, although their 12" gun main armament was heavier than others of that type. The design was rushed, and the class suffered from numerous defects during their service.
+
<!-- ''Describe the history of the creation and combat usage of the ship in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the ship and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Ship-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the ship's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
 +
The ''Ikoma'' was the 2nd of the 2-ship ''Tsukuba'' class of armoured cruisers built by Japan. They were ordered as a result of the loss of 2 pre-dreadnought battleships to mines early in the Russo-Japanese War of 1904-1905, and were fairly standard armoured cruisers of the era, although their 12" gun main armament was heavier than others of that type. The design was rushed, and the class suffered from numerous defects during their service.
  
The Ikoma was laid down in March 1905, launched in April 1906, and commissioned in March 1908.
+
The ''Ikoma'' was laid down in March 1905, launched in April 1906, and commissioned in March 1908.
  
During WW1 it took part in the Japanese assault on Tsingtao in China, then escorted allied convoys in hte south-west Pacific, being based in Hong Kong, Singapore and Townsville, Australia.
+
During WW1 it took part in the Japanese assault on Tsingtao in China, then escorted allied convoys in the south-west Pacific, being based in Hong Kong, Singapore and Townsville, Australia.
  
 
After the war it was scrapped to meet obligations of the Washington Naval Treaty, and removed from the navy list in September 1923.
 
After the war it was scrapped to meet obligations of the Washington Naval Treaty, and removed from the navy list in September 1923.
 
''Describe the history of the creation and combat usage of the ship in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the ship and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Ship-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the ship's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).''
 
  
 
== Media ==
 
== Media ==

Revision as of 12:58, 10 September 2021

Rank VI USA | Premium | Golden Eagles
A-10A Thunderbolt (Early)
IJN Ikoma
jp_armoredcruiser_ikoma.png
GarageImage IJN Ikoma.jpg
IJN Ikoma
AB RB SB
5.7 5.7 5.7
Research:105 000 Specs-Card-Exp.png
Purchase:310 000 Specs-Card-Lion.png
Show in game

Description

The Tsukuba-class, IJN Ikoma, 1912 is a rank IV Japanese battlecruiser with a battle rating of 5.7 (AB/RB/SB). It was introduced in Update "New Power".

General info

Survivability and armour

Armourfront / side / back
Citadel51 / 178 / 38 mm
Main fire tower178 / 178 / 178 mm
Hull25 mm (steel)
Superstructure16 mm (steel)
Number of section8
Displacement15 150 t
Crew820 people

The Ikoma has a typical armour scheme for an armoured cruiser of its era - thick armour protecting the vitals - a waterline belt of 178 mm of rolled cemented (face hardened) armour in the middle of the ship, and a 127 mm thick rolled cemented citadel above that protecting the casemated 6" guns, which themselves have 152 mm rolled cemented gunshields. The corners of the citadel are also 152 mm rolled cemented.

The main turrets and barbettes under them are 178 mm of rolled cemented, with 25 mm rolled homogenous roofs. The 4.7" guns have 80 mm rolled cemented gunshields.

The waterline fore and aft of the main belt has a thinner belt of 102 mm cemented, conning towers are 203 mm rolled cemented at the front, and 152 mm at the rear, with 38 mm rolled homogenous roofs.

There are 3 decks of 38 mm rolled homogeneous armour - the top 2 are horizontal, the bottom one has a "step" in it allowing a higher headroom in the engine rooms.

The 2 magazines are each fully enclosed by 38 mm rolled homogenous plate. Lastly there are 25 mm rolled homogeneous bulkheads covering the gap between the 2 main barbettes and the citadel fore and aft. Coal bunkers line the unarmoured sides of the engine rooms.

By the standards of later times it is a complicated scheme, however it gives comprehensive protection against 6-8" guns of WW2 era cruisers. The crew is 884 men, which is quite substantial, and they are well protected.

Mobility

Speedforward / back
AB47 / 25 km/h
RB41 / 22 km/h
Mobility Characteristics
Game Mode Upgrade Status Maximum Speed (km/h) Turn Time (s) Turn Radius (m)
Forward Reverse
AB Stock ___ ___
Upgraded 47 25
RB/SB Stock ___ ___
Upgraded 41 22

The ship is extremely slow, and not very manoeuvrable. Acceleration and deceleration rates are not good, and it takes a considerable time to start turning.

Modifications and economy

Repair costBasic → Reference
AB13 945 → 17 514 Sl icon.png
RB19 357 → 24 312 Sl icon.png
Total cost of modifications93 000 Rp icon.png
157 000 Sl icon.png
Talisman cost1 800 Ge icon.png
Crew training90 000 Sl icon.png
Experts310 000 Sl icon.png
Aces1 200 Ge icon.png
Research Aces570 000 Rp icon.png
Reward for battleAB / RB / SB
450 / 600 / 100 % Sl icon.png
178 / 178 / 178 % Rp icon.png
Modifications
Seakeeping Unsinkability Firepower
Mods new ship hull.png
Dry-Docking
Research:
3 700 Rp icon.png
Cost:
6 200 Sl icon.png
175 Ge icon.png
Mods new ship rudder.png
Rudder Replacement
Research:
7 000 Rp icon.png
Cost:
12 000 Sl icon.png
330 Ge icon.png
Mods new ship screw.png
Propeller Replacement
Research:
4 700 Rp icon.png
Cost:
7 800 Sl icon.png
220 Ge icon.png
Mods new ship engine.png
Engine Maintenance
Research:
10 000 Rp icon.png
Cost:
17 000 Sl icon.png
470 Ge icon.png
Mods ship damage control crew.png
Damage Control Division
Research:
3 700 Rp icon.png
Cost:
6 200 Sl icon.png
175 Ge icon.png
Mods ship fire control crew.png
Fire Division
Research:
7 000 Rp icon.png
Cost:
12 000 Sl icon.png
330 Ge icon.png
Mods ship anti fragmentation protection.png
Shrapnel Protection
Research:
4 700 Rp icon.png
Cost:
7 800 Sl icon.png
220 Ge icon.png
Mods ship venting.png
Ventilation
Research:
4 700 Rp icon.png
Cost:
7 800 Sl icon.png
220 Ge icon.png
Mods new ship pumps.png
New Pumps
Research:
10 000 Rp icon.png
Cost:
17 000 Sl icon.png
470 Ge icon.png
Mods ship ammo wetting.png
Ammo Wetting
Research:
10 000 Rp icon.png
Cost:
17 000 Sl icon.png
470 Ge icon.png
Mods new aa caliber turrets.png
Anti-Air Armament Targeting
Research:
3 700 Rp icon.png
Cost:
6 200 Sl icon.png
175 Ge icon.png
Mods tank ammo.png
305mm_jp_50_41st_yt_navy_apc_ammo_pack
Research:
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Cost:
6 200 Sl icon.png
175 Ge icon.png
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152mm_jp_45_41st_yt_navy_apc_ammo_pack
Research:
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Cost:
6 200 Sl icon.png
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Auxiliary Armament Targeting
Research:
7 000 Rp icon.png
Cost:
12 000 Sl icon.png
330 Ge icon.png
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Primary Armament Targeting
Research:
4 700 Rp icon.png
Cost:
7 800 Sl icon.png
220 Ge icon.png
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Improved Rangefinder
Research:
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Cost:
7 800 Sl icon.png
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Armament

Primary armament

2 х Turret2 x 12-inch/45 Vickers cannon
Ammunition160 rounds
Vertical guidance-5° / 25°

Provide information about the characteristics of the primary armament. Evaluate their efficacy in battle based on their reload speed, ballistics and the capacity of their shells. Add a link to the main article about the weapon: {{main|Weapon name (calibre)}}. Broadly describe the ammunition available for the primary armament, and provide recommendations on how to use it and which ammunition to choose.

Secondary armament

12 х Turret6-inch/45 Type 41 cannon
Ammunition150 rounds
12 х Turret4,7-inch/40 Armstrong cannon
Ammunition150 rounds

Some ships are fitted with weapons of various calibres. Secondary armaments are defined as weapons chosen with the control Select secondary weapon. Evaluate the secondary armaments and give advice on how to use them. Describe the ammunition available for the secondary armament. Provide recommendations on how to use them and which ammunition to choose. Remember that any anti-air armament, even heavy calibre weapons, belong in the next section. If there is no secondary armament, remove this section.

Anti-aircraft armament

4 х Turret3-inch/40 Type 41 cannon
Ammunition150 rounds

An important part of the ship's armament responsible for air defence. Anti-aircraft armament is defined by the weapon chosen with the control Select anti-aircraft weapons. Talk about the ship's anti-air cannons and machine guns, the number of guns and their positions, their effective range, and about their overall effectiveness – including against surface targets. If there are no anti-aircraft armaments, remove this section.

Additional armament

Setup 111 x 21 inch Type 43 (1910) torpedo
1 x 18 inch Type 38 No.2 B torpedo

The 21 inch Type 43 (1910) torpedo is a good weapon by the standards of 1910 when it was introduced. It carries a 130 kg Shimose warhead (143kg TNT equivalent) to a range of 8km at 50kph. The warhead is small by later standards, and not likely to knock out a destroyer with one hit, let alone anything larger.

The Ikoma carries 2 fixed tubes - 1 facing to each broadside, and 17 reloads. The fixed tubes are located under the forward main turret, and are difficult to use since they are aimed by manoeuvring the ship - which is not easy to do as already noted.

The limitations are such that not carrying any torpedoes is a good choice - the SL you save is greater than any reward you might get.

Usage in battles

The Ikoma is classed as a "battlecruiser" in War Thunder, probably because it was designated a battlecruiser by the Japanese from 1912. However it is too slow and unmanoeuvrable to be used as a "fast battleship" as battlecruisers are often considered.

It is better to consider it as the armoured cruiser it was designed as. There is no real modern counterpart to "armoured cruiser", so it is probably simplest to think of it as a slow heavy cruiser. In some respects it is comparable to the Deutschland class "Panzerschiff" (eg the Admiral Graf Spee), especially in terms of the main armament being a small number of heavy guns. It can be played in a similar manner - mostly trying to "camp" somewhere protected from torpedoes and using the small number of heavy guns to score damaging hits on easy targets.

The slow rate of fire and small number of the main guns make them difficult to use against fast moving manoeuvring targets - they are best used against large targets that lack manoeuvrability such as heavy cruisers or larger. Light cruisers, destroyers, and smaller vessels can be attacked by controlling the secondary 6" and 4.7" guns - there are 6 of each on each broadside and they can make short work of smaller ships or boats.

It is possible to manage the fire of the 2 main turrets so that they each fire separately at approximately equal intervals. This provides more opportunity to correct range, and also accurate tracking of a target that is trying to manoeuvre to avoid the heavy shells.

It is often impossible to dodge torpedoes due to the sluggish manoeuvrability, so using islands as a shield from torpedoes is recommended where they are available.

There is no effective AA armament, and aircraft can easily come down to mast height to accurately deliver bombs, rockets or torpedoes. You can only hope the rest of your team has enough AA to provide some protection. The 3 armoured decks can absorb a lot of punishment from smaller bombs, but any armour piercing bombs, or anything from 1,000 lb/500 kg upwards will cause significant damage. At this BR, heavier bombs such as 1,800 kg, 4,000 lb and 5,000 kg are common loads, and can destroy the ship with 1 or 2 hits.

Backups for this ship cost only 20 GE, so it is worth considering buying them rather than using universal backups - you should always use backups of some variety when grinding through the various modules.

Pros and cons

Pros:

  • Powerful 12" main armament can wreck anything less than a battleship with a few hits;
  • Heavy secondary armament of 6" and 4.7" guns is sufficient to take out destroyers and smaller vessels when controlled by the player;
  • Heavy armour absorbs most damage from enemy guns and small-medium bombs;
  • Backups cost only 20 GE.

Cons:

  • Slow, and very slow to turn or accelerate/decelerate - makes dodging torpedoes difficult;
  • Only 4 of the 12" guns with a very slow rate of fire (30 second reload when maxed) makes accurate shooting difficult against moving targets;
  • No effective AA means opposing aircraft can press home attacks to minimum range and maximum accuracy.

History

The Ikoma was the 2nd of the 2-ship Tsukuba class of armoured cruisers built by Japan. They were ordered as a result of the loss of 2 pre-dreadnought battleships to mines early in the Russo-Japanese War of 1904-1905, and were fairly standard armoured cruisers of the era, although their 12" gun main armament was heavier than others of that type. The design was rushed, and the class suffered from numerous defects during their service.

The Ikoma was laid down in March 1905, launched in April 1906, and commissioned in March 1908.

During WW1 it took part in the Japanese assault on Tsingtao in China, then escorted allied convoys in the south-west Pacific, being based in Hong Kong, Singapore and Townsville, Australia.

After the war it was scrapped to meet obligations of the Washington Naval Treaty, and removed from the navy list in September 1923.

Media

Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Links to articles on the War Thunder Wiki that you think will be useful for the reader, for example:

  • reference to the series of the ship;
  • links to approximate analogues of other nations and research trees.

External links

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • other literature.


Japan battlecruisers
Tsukuba-class  IJN Ikoma
Kurama-class  IJN Kurama