Difference between revisions of "Ki-21-Ia"

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{{Specs-Card|code=ki_21_1ko}}
 
 
{{About
 
{{About
 
| about = Japanese bomber '''{{PAGENAME}}'''
 
| about = Japanese bomber '''{{PAGENAME}}'''
 
| usage = the gift version
 
| usage = the gift version
 
| link = Ki-21-I hei
 
| link = Ki-21-I hei
 +
}}
 +
{{Specs-Card
 +
|code=ki_21_1ko
 +
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png}}
 
}}
 
}}
  
 
== Description ==
 
== Description ==
 
<!-- ''In the description, the first part should be about the history of and the creation and combat usage of the aircraft, as well as its key features. In the second part, tell the reader about the aircraft in the game. Insert a screenshot of the vehicle, so that if the novice player does not remember the vehicle by name, he will immediately understand what kind of vehicle the article is talking about.'' -->
 
<!-- ''In the description, the first part should be about the history of and the creation and combat usage of the aircraft, as well as its key features. In the second part, tell the reader about the aircraft in the game. Insert a screenshot of the vehicle, so that if the novice player does not remember the vehicle by name, he will immediately understand what kind of vehicle the article is talking about.'' -->
−
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
+
The '''Ki-21''', designated as the '''Type 97 Heavy Bomber ({{Annotation|九七式重爆撃機|Kyū Nana-Shiki Jū-Bakugekiki}})''', represented a significant advancement in the Japanese Army's aerial capabilities, introducing a new strategic doctrine. Preceding licensed and modified bomber models, such as the Ki-1, Ki-2, Ki-20, and [[B.R.20 (Family)|B.R.20]], suffered sluggish speed and inadequate armament, rendering them vulnerable to interception. In contrast, the Ki-21 was conceived as a high-speed, long-range twin-engine bomber, prioritizing speed and range over armour and payload. The aim was to strike enemy airfields preemptively, before they could deploy their fighter aircraft, and to evade interception by outpacing enemy fighters. Additionally, the Ki-21 boasted self-defence armament to fend off attacks from various angles with its array of machine guns. The '''Ki-21-Ia''' emerged as the first production variant of the Ki-21 series. While initially proving more effective than its predecessors, its effectiveness waned as aerial warfare evolved throughout the war.
−
{{break}}
+
 
−
The '''{{Specs|name}}''' is a rank {{Specs|rank}} Japanese bomber {{Battle-rating}}. It was introduced in [[Update 1.49 "Weapons of Victory"]].
+
Introduced in [[Update 1.49 "Weapons of Victory"]], the '''Ki-21-I ko''' is a versatile low-altitude medium bomber renowned for its impressive manoeuvrability for a bomber, although hindered by a low total bomb capacity, it excels in targeting ground targets such as pillboxes and tanks, with preferred naval targets being destroyers and cargo ships, while its light turret armament suggests optimal performance at higher altitudes, its different bomb layouts offer versatility, with 20 x 50 kg bombs effective against multiple ground targets and 2 x 500 kg bombs recommended for bases, making it a competent early-rank bomber despite its low total bomb tonnage.
  
−
The Ki-21-Ia's role is a low-altitude medium bomber capable of destroying ground targets such as pillboxes and tanks. Although hindered by a low total bomb capacity, this aircraft is renowned for its impressive manoeuvrability. This being said, it is very easy for the Ki-21 to hover above an area and drop all of its payload rather quickly. The main targets of this bomber should be ground targets. The preferred naval targets of this plane should be destroyers and cargo ships, do not try to attack large vessels like carriers and battleships as your weak payload would not be strong enough to sink the vessel.
+
;Nicknames
  
−
With light turret armament, the Ki-21 is a plane that would probably perform its role as a bomber best at higher altitudes. The different bomb layouts on the plane add a degree of versatility, with the 20 x 50 kg bombs allowing the plane to take out a lot of ground targets effectively. Though, if the plane were dragged into higher rank matches the bomb load would be pretty ineffective against ground vehicles and wouldn't be very efficient against bases. For bases, naturally the best payload option would be the 2 x 500 kg bombs. For an early-rank bomber, it does its job well and though it lumbers through the air from time to time, it is much more manoeuvrable than the other Japanese equivalent at this rank, the [[H6K4]].
+
* IJA Pilot abbreviation:
 +
** ''Kyu-Nana Shiki Jū Baku (九七式重爆, Type 97 Heavy Bomb)''
 +
** ''Kyu-Nana Jū Baku (九七重爆, 97 Heavy Bomb)''
 +
** ''Kyu-Nana Jū (九七重, 97 Heavy)''
 +
* Allied reporting name:
 +
** ''Jane'' <small>- Objected by Gen. Douglas MacArthur (same name as his wife)</small>
 +
** '''Sally'''
 +
** ''Gwen'' <small>- Ki-21-IIb misreported as separate model</small>
  
 
== General info ==
 
== General info ==
 
=== Flight performance ===
 
=== Flight performance ===
−
''Describe how the aircraft behaves in the air. Speed, manoeuvrability, acceleration and allowable loads - these are the most important characteristics of the vehicle.''
+
{{Specs-Avia-Flight}}
 +
<!-- ''Describe how the aircraft behaves in the air. Speed, manoeuvrability, acceleration and allowable loads - these are the most important characteristics of the vehicle.'' -->
  
−
{| class="wikitable" style="text-align:center"
+
{| class="wikitable" style="text-align:center" width="70%"
−
|-
+
! rowspan="2" | Characteristics
−
! colspan="8" | Characteristics
 
−
|-
 
−
! colspan="8" | ''Stock''
 
−
|-
 
 
! colspan="2" | Max Speed<br>(km/h at 400 m)
 
! colspan="2" | Max Speed<br>(km/h at 400 m)
−
! rowspan="2" | Max altitude<br>(meters)
+
! rowspan="2" | Max altitude<br>(metres)
 
! colspan="2" | Turn time<br>(seconds)
 
! colspan="2" | Turn time<br>(seconds)
−
! colspan="2" | Rate of climb<br>(meters/second)
+
! colspan="2" | Rate of climb<br>(metres/second)
−
! rowspan="2" | Take-off run<br>(meters)
+
! rowspan="2" | Take-off run<br>(metres)
−
|-
 
−
! AB
 
−
! RB
 
−
! AB
 
−
! RB
 
−
! AB
 
−
! RB
 
−
|-
 
−
| 413 || 398 || {{Specs|ceiling}} || 14.7 || 15.2 || 3.1 || 3.1 || 600
 
−
|-
 
−
! colspan="8" | ''Upgraded''
 
 
|-
 
|-
−
! colspan="2" | Max Speed<br>(km/h at 400 m)
+
! AB !! RB !! AB !! RB !! AB !! RB
−
! rowspan="2" | Max altitude<br>(meters)
 
−
! colspan="2" | Turn time<br>(seconds)
 
−
! colspan="2" | Rate of climb<br>(meters/second)
 
−
! rowspan="2" | Take-off run<br>(meters)
 
 
|-
 
|-
−
! AB
+
! Stock
−
! RB
+
| 412 || 399 || rowspan="2" | {{Specs|ceiling}} || 14.7 || 15.3 || 3.1 || 3.1 || rowspan="2" | 600
−
! AB
 
−
! RB
 
−
! AB
 
−
! RB
 
 
|-
 
|-
−
| 454 || 432 || {{Specs|ceiling}} || 13.6 || 14.0 || 9.8 || 5.9 || 600
+
! Upgraded
 +
| 453 || 432 || 13.6 || 14.0 || 9.8 || 5.9
 
|-
 
|-
 
|}
 
|}
  
 
==== Details ====
 
==== Details ====
−
{| class="wikitable" style="text-align:center"
+
{| class="wikitable" style="text-align:center" width="50%"
 
|-
 
|-
 
! colspan="5" | Features
 
! colspan="5" | Features
 
|-
 
|-
−
! Combat flaps
+
! Combat flaps !! Take-off flaps !! Landing flaps !! Air brakes !! Arrestor gear
−
! Take-off flaps
 
−
! Landing flaps
 
−
! Air brakes
 
−
! Arrestor gear
 
 
|-
 
|-
 
| ✓ || ✓ || ✓ || X || X    <!-- ✓ -->
 
| ✓ || ✓ || ✓ || X || X    <!-- ✓ -->
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|}
 
|}
  
−
{| class="wikitable" style="text-align:center"
+
{| class="wikitable" style="text-align:center" width="50%"
 
|-
 
|-
−
! colspan="5" | Limits
+
! colspan="7" | Limits
 
|-
 
|-
−
! rowspan="2" | Wing-break speed<br>(km/h)
+
! rowspan="2" | Wings (km/h)
−
! rowspan="2" | Gear limit<br>(km/h)
+
! rowspan="2" | Gear (km/h)
−
! rowspan="2" | Combat flaps<br>(km/h)
+
! colspan="3" | Flaps (km/h)
 
! colspan="2" | Max Static G
 
! colspan="2" | Max Static G
 
|-
 
|-
−
! +
+
! Combat !! Take-off !! Landing !! + !! -
−
! -
 
 
|-
 
|-
−
| {{Specs|destruction|constructions}} || {{Specs|destruction|chassis}} || 450 || ~7 || ~2
+
| {{Specs|destruction|body}} || {{Specs|destruction|gear}} || 428 || 399 || 250 || ~7 || ~2
 
|-
 
|-
 
|}
 
|}
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{| class="wikitable" style="text-align:center"
 
{| class="wikitable" style="text-align:center"
 
|-
 
|-
−
! colspan="4" | Optimal velocities
+
! colspan="4" | Optimal velocities (km/h)
 
|-
 
|-
−
! Ailerons<br>(km/h)
+
! Ailerons !! Rudder !! Elevators !! Radiator
−
! Rudder<br>(km/h)
 
−
! Elevators<br>(km/h)
 
−
! Radiator<br>(km/h)
 
 
|-
 
|-
 
| < 260 || < 260 || < 260 || > 320
 
| < 260 || < 260 || < 260 || > 320
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=== Survivability and armour ===
 
=== Survivability and armour ===
−
''Examine the survivability of the aircraft. Note how vulnerable the structure is and how secure the pilot is, whether the fuel tanks are armoured, etc. Describe the armour, if there is any, and also mention the vulnerability of other critical aircraft systems.''
+
{{Specs-Avia-Armour}}
 +
<!-- ''Examine the survivability of the aircraft. Note how vulnerable the structure is and how secure the pilot is, whether the fuel tanks are armoured, etc. Describe the armour, if there is any, and also mention the vulnerability of other critical aircraft systems.'' -->
 +
 
 +
* No armour
 +
* Self-sealing fuel tanks (2 in each wing, 2 in the mid-fuselage)
 +
 
 +
=== Modifications and economy ===
 +
{{Specs-Economy}}
 +
 
 +
Being a bomber, speed is not necessarily an important attribute, however payload and defensive armament is. Upgrading the bombs allows for more target flexibility and damage potential while turret upgrades will help survivability. the turret belts and the "new turrets" upgrades are useful. The "new turrets" upgrade will allow you to fire the turrets for longer periods of time and having access to multiple ammunition belts is also helpful. The engine upgrades are also useful in that they will help you reach your target faster and will control engine temperature. Having all of the weapons upgrades will help drastically in unlocking the other modules on this aircraft. Getting the airframe module does help in survivability as it helps your plane's durability.
  
 
== Armaments ==
 
== Armaments ==
 +
{{Specs-Avia-Armaments}}
 
=== Suspended armament ===
 
=== Suspended armament ===
 +
{{Specs-Avia-Suspended}}
 
<!-- ''Describe the aircraft's suspended armament: additional cannons under the wings, bombs, rockets and torpedoes. This section is especially important for bombers and attackers. If there is no suspended weaponry remove this subsection.'' -->
 
<!-- ''Describe the aircraft's suspended armament: additional cannons under the wings, bombs, rockets and torpedoes. This section is especially important for bombers and attackers. If there is no suspended weaponry remove this subsection.'' -->
 
{{main|Army Type 94 GPHE (50 kg)|Army Type 94 GPHE (100 kg)|Army Type 92 GPHE (250 kg)|Army Type 92 GPHE (500 kg)}}
 
{{main|Army Type 94 GPHE (50 kg)|Army Type 94 GPHE (100 kg)|Army Type 92 GPHE (250 kg)|Army Type 92 GPHE (500 kg)}}
  
 
The '''''{{PAGENAME}}''''' can be outfitted with the following ordnance:
 
The '''''{{PAGENAME}}''''' can be outfitted with the following ordnance:
 +
 
* 20 x 50 kg Army Type 94 GPHE bombs (1,000 kg total)
 
* 20 x 50 kg Army Type 94 GPHE bombs (1,000 kg total)
 
* 10 x 100 kg Army Type 94 GPHE bombs (1,000 kg total)
 
* 10 x 100 kg Army Type 94 GPHE bombs (1,000 kg total)
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=== Defensive armament ===
 
=== Defensive armament ===
 +
{{Specs-Avia-Defensive}}
 
<!-- ''Defensive armament with turret machine guns or cannons, crewed by gunners. Examine the number of gunners and what belts or drums are better to use. If defensive weaponry is not available, remove this subsection.'' -->
 
<!-- ''Defensive armament with turret machine guns or cannons, crewed by gunners. Examine the number of gunners and what belts or drums are better to use. If defensive weaponry is not available, remove this subsection.'' -->
−
{{main|Type 89 special army (7.7 mm)|Te-1 army (7.7 mm)}}
+
{{main|Te-1 (7.7 mm)|Type 89 'special' (7.7 mm)}}
  
 
The '''''{{PAGENAME}}''''' is defended by:
 
The '''''{{PAGENAME}}''''' is defended by:
−
* 2 x 7.7 mm Type 89 special army machine guns, dorsal turret (450 rpg = 900 total)
+
 
−
* 1 x 7.7 mm Te-1 army machine gun, nose turret (483 rpg)
+
* 2 x 7.7 mm Type 89 'special' machine guns, dorsal turret (450 rpg = 900 total)
−
* 1 x 7.7 mm Te-1 army machine gun, ventral turret (483 rpg)
+
* 1 x 7.7 mm Te-1 machine gun, nose turret (483 rpg)
 +
* 1 x 7.7 mm Te-1 machine gun, ventral turret (483 rpg)
  
 
== Usage in battles ==
 
== Usage in battles ==
−
<!-- ''Describe the tactics of playing in an aircraft, the features of using aircraft in a team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view, but instead, give the reader food for thought. Examine the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).'' -->
+
<!-- ''Describe the tactics of playing in the aircraft, the features of using aircraft in a team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view, but instead, give the reader food for thought. Examine the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).'' -->
 
If attacked by fighters, it is important to remember and recognize the Ki-21's turning capabilities. It is actually possible to win lateral turn fights against fighters with this aircraft as she is one of the most manoeuvrable bombers if not the most manoeuvrable bomber in game. While the Ki-21's defensive firepower isn't going to deter enemies from attacking, they still can damage enemy planes.
 
If attacked by fighters, it is important to remember and recognize the Ki-21's turning capabilities. It is actually possible to win lateral turn fights against fighters with this aircraft as she is one of the most manoeuvrable bombers if not the most manoeuvrable bomber in game. While the Ki-21's defensive firepower isn't going to deter enemies from attacking, they still can damage enemy planes.
  
−
This aircraft has the ability to hold up to 1000 kg of bombs in several different variations: 20 x 50 kg, 10 x 100 kg, 4x 250 kg, and 2 x 500 kg. Use the 20 x 50 kg or 10 x 100 kg bombs to attack light tanks and light pillboxes. They are not viable against bigger targets, since direct hits are needed to destroy. This loadout is particularly useful on maps that have an abundance of non-moving targets (light pillboxes) or lightly armoured targets (armoured cars or AA trucks for example). Use either of the 4 x 250 kg or 2 x 500 kg payload to destroy heavier targets such as medium tanks, pillboxes, destroyers, and cargo ships.
+
This aircraft has the ability to hold up to 1,000 kg of bombs in several different variations: 20 x 50 kg, 10 x 100 kg, 4 x 250 kg, and 2 x 500 kg. Use the 20 x 50 kg or 10 x 100 kg bombs to attack light tanks and light pillboxes. They are not viable against bigger targets, since direct hits are needed to destroy. This loadout is particularly useful on maps that have an abundance of non-moving targets (light pillboxes) or lightly armoured targets (armoured cars or AA trucks for example). Use either of the 4 x 250 kg or 2 x 500 kg payload to destroy heavier targets such as medium tanks, pillboxes, destroyers, and cargo ships.
  
 
Although unconventional, this aircraft is a fantastic weapon if you want to bait the enemy. Ideally, you would want to attract a higher flying enemy down to you and to get into a turn fight. This way, depending on the enemy aircraft you can out manoeuvre and distract him while teammates fly down to finish him off.
 
Although unconventional, this aircraft is a fantastic weapon if you want to bait the enemy. Ideally, you would want to attract a higher flying enemy down to you and to get into a turn fight. This way, depending on the enemy aircraft you can out manoeuvre and distract him while teammates fly down to finish him off.
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! rowspan="2" | Turbocharger
 
! rowspan="2" | Turbocharger
 
|-
 
|-
−
! Oil
+
! Oil !! Water !! Type
−
! Water
 
−
! Type
 
−
|-
 
−
| Not controllable || rowspan="2" | Not controllable<br>Not auto controlled || rowspan="2" | Controllable<br>Auto control available || rowspan="2" | Controllable<br>Auto control available || rowspan="2" | Separate || rowspan="2" | Not controllable<br>1 gear || rowspan="2" | Not controllable
 
−
|-
 
−
|}
 
−
 
 
−
=== Modules ===
 
−
{| class="wikitable"
 
−
! colspan="1" | Tier
 
−
! colspan="2" | Flight performance
 
−
! colspan="1" | Survivability
 
−
! colspan="2" | Weaponry
 
−
|-
 
−
| I
 
−
| Fuselage repair
 
−
| Radiator
 
−
|
 
−
| Turret 7 mm
 
−
| 12 in (mod30)
 
−
|-
 
−
| II
 
−
|
 
−
| Compressor
 
−
| Airframe
 
−
| New 7 mm MGs (turret)
 
−
|
 
−
|-
 
−
| III
 
−
| Wings repair
 
−
| Engine
 
−
|
 
−
| Turret 7 mm
 
−
| 14 in (mod30)
 
 
|-
 
|-
−
| IV
+
| Not controllable || Controllable<br>Not auto controlled || Controllable<br>Auto control available || Controllable<br>Auto control available || Separate || Not controllable<br>1 gear || Not controllable
−
|
 
−
| Engine injection
 
−
| Cover
 
−
| New 7 mm MGs (turret)
 
−
|
 
 
|-
 
|-
 
|}
 
|}
−
 
−
* Being a bomber, speed is not necessarily an important attribute, however payload and defensive armament is. Upgrading the bombs allows for more target flexibility and damage potential while turret upgrades will help survivability. the turret belts and the "new turrets" upgrades are useful. The "new turrets" upgrade will allow you to fire the turrets for longer periods of time and having access to multiple ammunition belts is also helpful. The engine upgrades are also useful in that they will help you reach your target faster and will control engine temperature. Having all of the weapons upgrades will help drastically in unlocking the other modules on this aircraft. Getting the airframe module does help in survivability as it helps your plane's durability.
 
  
 
=== Pros and cons ===
 
=== Pros and cons ===
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'''Pros:'''
 
'''Pros:'''
 +
 
* Very manoeuvrable
 
* Very manoeuvrable
 
* Extensive bombload for a rank I Japanese bomber
 
* Extensive bombload for a rank I Japanese bomber
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'''Cons:'''
 
'''Cons:'''
 +
 
* Loses effectiveness with altitude
 
* Loses effectiveness with altitude
 
* No armour
 
* No armour
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* Falls quickly when attacked by multiple foes
 
* Falls quickly when attacked by multiple foes
 
* Head on attacks are usually fatal because of lack of protection for the pilots
 
* Head on attacks are usually fatal because of lack of protection for the pilots
 +
* Gunners can be knocked out easily
  
 
== History ==
 
== History ==
−
<!-- ''Describe the history of the creation and combat usage of the aircraft 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 vehicle and adding a block "/ History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-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 vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
+
<!-- ''Describe the history of the creation and combat usage of the aircraft 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 vehicle and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-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 vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
 
In 1936, the Imperial Japanese Army Air Service issued a requirement for a new heavy bomber to replace two previous models. This new heavy bomber had to have a crew of four to six men, a top speed of 400 km/h (250 mph), had to be able to carry a bomb load greater than 750 kg (1,650 lb), had to be able to climb to altitude in less than 8 minutes, and had to take off in less than 300 m (980 ft). The new bomber also had to utilize Nakajima Ha-5 or Mitsubishi Ha-6 engines and had to contain specific models of radios, among many other specifications. These requirements were quite extensive and there weren't many heavy bombers in existence at the time that could perform at these standards.
 
In 1936, the Imperial Japanese Army Air Service issued a requirement for a new heavy bomber to replace two previous models. This new heavy bomber had to have a crew of four to six men, a top speed of 400 km/h (250 mph), had to be able to carry a bomb load greater than 750 kg (1,650 lb), had to be able to climb to altitude in less than 8 minutes, and had to take off in less than 300 m (980 ft). The new bomber also had to utilize Nakajima Ha-5 or Mitsubishi Ha-6 engines and had to contain specific models of radios, among many other specifications. These requirements were quite extensive and there weren't many heavy bombers in existence at the time that could perform at these standards.
  
 
Mitsubishi produced two prototypes of the Ki-21 to meet these standards. This new design proved superior to the design submitted by Kawasaki but was nearly on-par with Nakajima's submission. In early tests, Nakajima's prototype, the Ki-19 had more reliable engines and a better bombing platform, while the Ki-21 had better overall performance. In later rounds of testing, after the Army Air Service ordered modifications to be made to both prototypes, the Ki-21 came out on top and won the Army's contract for a heavy bomber.
 
Mitsubishi produced two prototypes of the Ki-21 to meet these standards. This new design proved superior to the design submitted by Kawasaki but was nearly on-par with Nakajima's submission. In early tests, Nakajima's prototype, the Ki-19 had more reliable engines and a better bombing platform, while the Ki-21 had better overall performance. In later rounds of testing, after the Army Air Service ordered modifications to be made to both prototypes, the Ki-21 came out on top and won the Army's contract for a heavy bomber.
  
−
Production began in November 1937 and the bomber began to see action in August 1938. The specific variant seen in game, the Ki-21-Ia, was used on the Chinese front during the Second Sino-Japanese War and against the Soviet Union during the Nomohan Incident. The Ki-21 would start off successfully during early World War 2, but by the end of World War 2 it was relegated to second line duties or kamikaze attacks. Overall 2,064 Mitsubishi Ki-21s of all variants were produced for the Japanese Army Air Force.
+
Production began in November 1937 and the bomber began to see action in August 1938. The specific variant seen in game, the Ki-21-Ia, was used on the Chinese front during the Second Sino-Japanese War and against the Soviet Union during the Nomohan Incident. The Ki-21 would start off successfully during early World War 2, but by the end of World War 2 it was relegated to second line duties or kamikaze attacks. Overall 2,064 Mitsubishi Ki-21s of all variants were produced for the Japanese Army Air Service.
  
 
== Media ==
 
== Media ==
−
''Excellent additions to the article would be video guides, screenshots from the game, and photos.''
+
<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->
 +
 
 +
;Skins
 +
* [https://live.warthunder.com/feed/camouflages/?vehicle=ki_21_1ko Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]
 +
 
 +
;Videos
 +
<gallery mode="packed" heights="200">
 +
File:Ki-21-Ia WTWallpaper 001.jpeg|
 +
File:Ki-21-Ia WTWallpaper 002.jpeg|
 +
File:Ki-21-Ia WTWallpaper 003.jpeg|
 +
</gallery>
  
 
== See also ==
 
== See also ==
Line 244: Line 211:
  
 
== External links ==
 
== External links ==
−
''Paste links to sources and external resources, such as:''
+
<!-- ''Paste links to sources and external resources, such as:''
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
−
* ''encyclopedia page on the aircraft;''
+
* ''other literature.'' -->
−
* ''other literature.''
+
 
 +
* [[wt:en/devblog/current/764|[Devblog] M3 75 mm GMC and Ki-21-1ko]]
 +
* [https://forum.warthunder.com/index.php?/topic/234534-mitsubishi-ki-21-i-kohei/ Official data sheet - more details about the performance]
  
−
<!--{{AirManufacturer Mitsubishi}}-->
+
{{AirManufacturer Mitsubishi}}
 
{{Japan bombers}}
 
{{Japan bombers}}

Latest revision as of 07:29, 28 August 2024

Rank 7 USA
F-5C Pack
This page is about the Japanese bomber Ki-21-Ia. For the gift version, see Ki-21-I hei.
Ki-21-Ia
ki_21_1ko.png
GarageImage Ki-21-Ia.jpg
ArtImage Ki-21-Ia.png
Ki-21-Ia
Japan flag.png Japan
I Rank
Battle rating:
AB RB SB
2.0 1.7 1.7
Class:
Research:4 000 Specs-Card-Exp.png
Purchase:2 100 Specs-Card-Lion.png
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Description

The Ki-21, designated as the Type 97 Heavy Bomber (九七式重爆撃機), represented a significant advancement in the Japanese Army's aerial capabilities, introducing a new strategic doctrine. Preceding licensed and modified bomber models, such as the Ki-1, Ki-2, Ki-20, and B.R.20, suffered sluggish speed and inadequate armament, rendering them vulnerable to interception. In contrast, the Ki-21 was conceived as a high-speed, long-range twin-engine bomber, prioritizing speed and range over armour and payload. The aim was to strike enemy airfields preemptively, before they could deploy their fighter aircraft, and to evade interception by outpacing enemy fighters. Additionally, the Ki-21 boasted self-defence armament to fend off attacks from various angles with its array of machine guns. The Ki-21-Ia emerged as the first production variant of the Ki-21 series. While initially proving more effective than its predecessors, its effectiveness waned as aerial warfare evolved throughout the war.

Introduced in Update 1.49 "Weapons of Victory", the Ki-21-I ko is a versatile low-altitude medium bomber renowned for its impressive manoeuvrability for a bomber, although hindered by a low total bomb capacity, it excels in targeting ground targets such as pillboxes and tanks, with preferred naval targets being destroyers and cargo ships, while its light turret armament suggests optimal performance at higher altitudes, its different bomb layouts offer versatility, with 20 x 50 kg bombs effective against multiple ground targets and 2 x 500 kg bombs recommended for bases, making it a competent early-rank bomber despite its low total bomb tonnage.

Nicknames
  • IJA Pilot abbreviation:
    • Kyu-Nana Shiki Jū Baku (九七式重爆, Type 97 Heavy Bomb)
    • Kyu-Nana Jū Baku (九七重爆, 97 Heavy Bomb)
    • Kyu-Nana Jū (九七重, 97 Heavy)
  • Allied reporting name:
    • Jane - Objected by Gen. Douglas MacArthur (same name as his wife)
    • Sally
    • Gwen - Ki-21-IIb misreported as separate model

General info

Flight performance

Max speed
at 400 m432 km/h
Turn time14 s
Max altitude8 600 m
Engine2 х Nakajima Ha-5
TypeRadial
Cooling systemAir
Take-off weight8 t
Characteristics Max Speed
(km/h at 400 m) 		Max altitude
(metres) 		Turn time
(seconds) 		Rate of climb
(metres/second) 		Take-off run
(metres)
AB RB AB RB AB RB
Stock 412 399 8600 14.7 15.3 3.1 3.1 600
Upgraded 453 432 13.6 14.0 9.8 5.9

Details

Features
Combat flaps Take-off flaps Landing flaps Air brakes Arrestor gear
✓ ✓ ✓ X X
Limits
Wings (km/h) Gear (km/h) Flaps (km/h) Max Static G
Combat Take-off Landing + -
540 380 428 399 250 ~7 ~2
Optimal velocities (km/h)
Ailerons Rudder Elevators Radiator
< 260 < 260 < 260 > 320
Compressor (RB/SB)
Setting 1
Optimal altitude 100% Engine power WEP Engine power
3,700 m 890 hp 1,080 hp

Survivability and armour

Crew5 people
Speed of destruction
Structural540 km/h
Gear380 km/h
  • No armour
  • Self-sealing fuel tanks (2 in each wing, 2 in the mid-fuselage)

Modifications and economy

Repair costBasic → Reference
AB239 → 301 Sl icon.png
RB340 → 428 Sl icon.png
SB482 → 607 Sl icon.png
Total cost of modifications4 430 Rp icon.png
2 690 Sl icon.png
Talisman cost300 Ge icon.png
Crew training600 Sl icon.png
Experts2 100 Sl icon.png
Aces45 Ge icon.png
Research Aces110 000 Rp icon.png
Reward for battleAB / RB / SB
20 / 40 / 80 % Sl icon.png
100 / 100 / 100 % Rp icon.png
Modifications
Flight performance Survivability Weaponry
Mods aerodinamic fuse.png
Fuselage repair
Research:
220 Rp icon.png
Cost:
135 Sl icon.png
45 Ge icon.png
Mods radiator.png
Radiator
Research:
220 Rp icon.png
Cost:
135 Sl icon.png
45 Ge icon.png
Mods compressor.png
Compressor
Research:
330 Rp icon.png
Cost:
200 Sl icon.png
70 Ge icon.png
Mods aerodinamic wing.png
Wings repair
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
60 Ge icon.png
Mods new engine.png
Engine
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
60 Ge icon.png
Mods metanol.png
Engine injection
Research:
480 Rp icon.png
Cost:
290 Sl icon.png
100 Ge icon.png
Mods armor frame.png
Airframe
Research:
330 Rp icon.png
Cost:
200 Sl icon.png
70 Ge icon.png
Mods armor cover.png
Cover
Research:
480 Rp icon.png
Cost:
290 Sl icon.png
100 Ge icon.png
Mods ammo.png
bmg303_turret_belt_pack
Research:
220 Rp icon.png
Cost:
135 Sl icon.png
45 Ge icon.png
Mod arrow 0.png
Mods pilon bomb.png
12 in (mod30)
Research:
220 Rp icon.png
Cost:
135 Sl icon.png
45 Ge icon.png
Mod arrow 1.png
Mods turret gun.png
vikkersK_turret_new_gun
Research:
330 Rp icon.png
Cost:
200 Sl icon.png
70 Ge icon.png
Mods ammo.png
type97_turret_belt_pack
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
60 Ge icon.png
Mod arrow 0.png
Mods pilon bomb.png
14 in (mod30)
Research:
280 Rp icon.png
Cost:
170 Sl icon.png
60 Ge icon.png
Mods turret gun.png
type89_turret_new_gun
Research:
480 Rp icon.png
Cost:
290 Sl icon.png
100 Ge icon.png

Being a bomber, speed is not necessarily an important attribute, however payload and defensive armament is. Upgrading the bombs allows for more target flexibility and damage potential while turret upgrades will help survivability. the turret belts and the "new turrets" upgrades are useful. The "new turrets" upgrade will allow you to fire the turrets for longer periods of time and having access to multiple ammunition belts is also helpful. The engine upgrades are also useful in that they will help you reach your target faster and will control engine temperature. Having all of the weapons upgrades will help drastically in unlocking the other modules on this aircraft. Getting the airframe module does help in survivability as it helps your plane's durability.

Armaments

Suspended armament

List of setups (4)
Setup 120 x 50 kg Army Type 94 GPHE bomb
Setup 210 x 100 kg Army Type 94 GPHE bomb
Setup 34 x 250 kg Army Type 92 GPHE bomb
Setup 42 x 500 kg Army Type 92 GPHE bomb
Main articles: Army Type 94 GPHE (50 kg), Army Type 94 GPHE (100 kg), Army Type 92 GPHE (250 kg), Army Type 92 GPHE (500 kg)

The Ki-21-Ia can be outfitted with the following ordnance:

  • 20 x 50 kg Army Type 94 GPHE bombs (1,000 kg total)
  • 10 x 100 kg Army Type 94 GPHE bombs (1,000 kg total)
  • 4 x 250 kg Army Type 92 GPHE bombs (1,000 kg total)
  • 2 x 500 kg Army Type 92 GPHE bombs (1,000 kg total)

Defensive armament

2 х Turret7.7 mm Te-1 machine gun
Ammunition483 rounds
Fire rate950 shots/min
Turret2 x 7.7 mm Type 89 machine gun 'special'
Ammunition900 rounds
Fire rate700 shots/min
Main articles: Te-1 (7.7 mm), Type 89 'special' (7.7 mm)

The Ki-21-Ia is defended by:

  • 2 x 7.7 mm Type 89 'special' machine guns, dorsal turret (450 rpg = 900 total)
  • 1 x 7.7 mm Te-1 machine gun, nose turret (483 rpg)
  • 1 x 7.7 mm Te-1 machine gun, ventral turret (483 rpg)

Usage in battles

If attacked by fighters, it is important to remember and recognize the Ki-21's turning capabilities. It is actually possible to win lateral turn fights against fighters with this aircraft as she is one of the most manoeuvrable bombers if not the most manoeuvrable bomber in game. While the Ki-21's defensive firepower isn't going to deter enemies from attacking, they still can damage enemy planes.

This aircraft has the ability to hold up to 1,000 kg of bombs in several different variations: 20 x 50 kg, 10 x 100 kg, 4 x 250 kg, and 2 x 500 kg. Use the 20 x 50 kg or 10 x 100 kg bombs to attack light tanks and light pillboxes. They are not viable against bigger targets, since direct hits are needed to destroy. This loadout is particularly useful on maps that have an abundance of non-moving targets (light pillboxes) or lightly armoured targets (armoured cars or AA trucks for example). Use either of the 4 x 250 kg or 2 x 500 kg payload to destroy heavier targets such as medium tanks, pillboxes, destroyers, and cargo ships.

Although unconventional, this aircraft is a fantastic weapon if you want to bait the enemy. Ideally, you would want to attract a higher flying enemy down to you and to get into a turn fight. This way, depending on the enemy aircraft you can out manoeuvre and distract him while teammates fly down to finish him off.

You should avoid any plane with cannons as this plane, while it is reasonably durable, does not like to take hits from cannon rounds. The plane that should be feared the most is the LaGG-3-34 which has the 37 mm cannon with the Air targets belts, as a single round from the 37 mm cannon will either cripple the Ki-21 or destroy it immediately.

Manual Engine Control

MEC elements
Mixer Pitch Radiator Supercharger Turbocharger
Oil Water Type
Not controllable Controllable
Not auto controlled 		Controllable
Auto control available 		Controllable
Auto control available 		Separate Not controllable
1 gear 		Not controllable

Pros and cons

Pros:

  • Very manoeuvrable
  • Extensive bombload for a rank I Japanese bomber
  • Decent cruising speed
  • Durable, can take some hits
  • Above average defensive armament for its BR
  • Internal payload

Cons:

  • Loses effectiveness with altitude
  • No armour
  • Defensive armament is still outclassed by many
  • Falls quickly when attacked by multiple foes
  • Head on attacks are usually fatal because of lack of protection for the pilots
  • Gunners can be knocked out easily

History

In 1936, the Imperial Japanese Army Air Service issued a requirement for a new heavy bomber to replace two previous models. This new heavy bomber had to have a crew of four to six men, a top speed of 400 km/h (250 mph), had to be able to carry a bomb load greater than 750 kg (1,650 lb), had to be able to climb to altitude in less than 8 minutes, and had to take off in less than 300 m (980 ft). The new bomber also had to utilize Nakajima Ha-5 or Mitsubishi Ha-6 engines and had to contain specific models of radios, among many other specifications. These requirements were quite extensive and there weren't many heavy bombers in existence at the time that could perform at these standards.

Mitsubishi produced two prototypes of the Ki-21 to meet these standards. This new design proved superior to the design submitted by Kawasaki but was nearly on-par with Nakajima's submission. In early tests, Nakajima's prototype, the Ki-19 had more reliable engines and a better bombing platform, while the Ki-21 had better overall performance. In later rounds of testing, after the Army Air Service ordered modifications to be made to both prototypes, the Ki-21 came out on top and won the Army's contract for a heavy bomber.

Production began in November 1937 and the bomber began to see action in August 1938. The specific variant seen in game, the Ki-21-Ia, was used on the Chinese front during the Second Sino-Japanese War and against the Soviet Union during the Nomohan Incident. The Ki-21 would start off successfully during early World War 2, but by the end of World War 2 it was relegated to second line duties or kamikaze attacks. Overall 2,064 Mitsubishi Ki-21s of all variants were produced for the Japanese Army Air Service.

Media

Skins
Videos
  • Ki-21-Ia WTWallpaper 001.jpeg
  • Ki-21-Ia WTWallpaper 002.jpeg
  • Ki-21-Ia WTWallpaper 003.jpeg

See also

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

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

External links


Mitsubishi Company (三菱商会)
Fighters  A5M4 · Hagiri's A5M4
  A6M2 mod. 11 · A6M2 · A6M3 · A6M3 mod. 22 · A6M3 mod. 22Ko · A6M5 · A6M5 Ko · A6M5 otsu · A6M5 Hei · A6M6c
  A7M1 (NK9H) · A7M2
  J2M2 · J2M3 · J2M4 Kai · J2M5 · J2M5 (30 mm)
Hydroplanes  F1M2
Interceptors  Ki-83 · Ki-109
Bombers  G4M1
  Ki-21-Ia · Ki-21-I hei · Ki-67-I Ko · Ki-67-I otsu
Jet Fighters  Ki-200
Captured  ▃A6M2 · ␗A6M2
See also  Mitsubishi Heavy Industries, Ltd. (Post-War)

Japan bombers
Navy 
Carrier-based attack bomber 
B5N  B5N2
B6N  B6N1 · B6N2 · B6N2a
B7A  B7A2 · B7A2 (Homare 23)
Carrier-based dive bomber 
D3A  D3A1
D4Y  D4Y1 · D4Y2 · D4Y3 Ko
Shipboard Observation seaplane 
F1M  F1M2
Land-based Attack bomber 
G4M  G4M1
G5N  G5N1
G8N  G8N1
Flying boat 
H6K  H6K4
H8K  H8K2 · H8K3
Land-based Bomber 
P1Y  P1Y1
Army 
Light  Ki-32
  Ki-48-II otsu
Heavy  Ki-21-Ia · Ki-21-I hei
  Ki-49-I · Ki-49-IIa · Ki-49-IIb · Ki-49-IIb/L
  Ki-67-I Ko · Ki-67-I otsu
Other countries  ▅B-17E

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