Difference between revisions of "Ki-27 otsu"

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{{Specs-Card|code=ki-27_otsu}}
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{{About
 +
| about = Japanese fighter '''{{PAGENAME}}'''
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| usage = other variants
 +
| link = Ki-27 (Family)
 +
}}
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{{Specs-Card
 +
|code=ki-27_otsu
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|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.jpg}}
 +
}}
  
 
== Description ==
 
== Description ==
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<!--''In the description, the first part needs to 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 screenshot of the vehicle. If the novice player does not remember the vehicle by name, he will immediately understand what kind of vehicle it is talking about.''-->
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<!-- ''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.'' -->
 +
The '''{{Specs|name}}''', designated as '''Type 97 Fighter ({{Annotation|九七式戦闘機|Kyū Nana-shiki Sentōki}})''', was a monoplane fighter aircraft designed by Nakajima Aircraft Company for the Imperial Japanese Army Air Service in 1937. It was the Army's first monoplane fighter and had a low wing loading that gave it excellent manoeuvrability. The Ki-27 served as the main fighter of the Japanese Army until 1940, and participated in battles over China, Mongolia, Southeast Asia and the early stages of the Pacific War. It gained air superiority against Chinese and Soviet fighters, but was outperformed by newer Allied planes. The Ki-27 was also operated by Manchukuo, Thailand, and the Reformed Government of the Republic of China. A total of 3,368 Ki-27s were produced before production ceased in 1942, when it was replaced by the Ki-43 in frontline service and relegated to training and reserves.
  
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[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
+
It was introduced in [[Update 1.43]]. The Ki-27 distinguishes itself as a low-level dogfighter: its performance below 1,000 m is superb and it can manoeuvre away from nearly any other comparable fighter. Like the [[Ki-10 (Family)|Ki-10 series]] before it, the Ki-27 otsu suffers from its poor armament (twin 7.7 mm Type 89s) and weak armour, which means it makes for a poor interceptor despite its high speed, but the Ki-27 makes an excellent escort for bombers and flying boats to provide cover for their allied bombers.
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{{break}}
 
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The '''{{Specs|name}}''' is a Rank {{Specs|rank}} Japanese fighter {{Battle-rating|1}}. It was introduced in Update 1.43.  
 
  
−
The Ki-27 is a front-line fighter for interwar / pre-WW2 historical engagements such as the Battles of Khalkin Gol. In most maps, the Ki-27 will distinguish itself as a low-level dog-fighter; its performance below 1,000 m altitudes is superb, and is able to maneuver away from nearly any other comparable fighter. Like the Ki-10 series before it, the Ki-27 otsu suffers from its poor armament (twin 7.7 mm Type 89s) and poor armor, which means it makes for a poor interceptor despite its high speed, but the Ki-27 makes a great escort for friendly bombers and flying boats. Providing cover for their allied bombers is a top priority for the Ki-27 pilots.
+
;Nicknames:
 +
* IJA Pilot Abbreviation: ''Kyū-Nana Sen'' (九七戦, "9-7 Fighter").
 +
* Allied reporting name: Nate
 +
* {{Annotation|CBI|China-Burma-India}} reporting name: Abdul
  
−
Like its [[Ki-10-II|Ki-10]] predecessor, the Ki-27 relies on its maneuverability for its protection. Turn-Fighting, therefore, is key for a Ki-27 pilot. Avoid diving on opponents, due to the Ki-27's fuel feed issues, and focus on scaring enemy pursuers away from bombers rather than chasing a kill. A lone Ki-27 is easy prey for allied energy fighters. Like most Japanese fighters, engaging an enemy head-on is not recommended. If engaging an enemy "energy Fighter" head-on, a good strategy is to just turn away (usually a shallow turn as you'll want him to miss you, but also pass you), and hope that he turns to follow.
+
== General info ==
 +
=== Flight performance ===
 +
{{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.'' -->
 +
Like its Ki-10 predecessor, the Ki-27 relies on its manoeuvrability for its survival. Therefore, turnfighting is vital for a Ki-27 pilot. Avoid diving on opponents, due to the Ki-27's fuel feed issues, and focus on scaring enemy pursuers away from bombers rather than chasing a kill. A lone Ki-27 is easy prey for allied energy fighters. Like most Japanese fighters, engaging an enemy head-on is not recommended. If fighting an enemy energy fighter head-on, a good strategy is to turn away (usually a slight turn as you'll want him to miss you, but also pass you), and hope that he turns to follow.
 +
 
 +
Like the comparable [[A5M4]], the Ki-27's carburettor engine suffers from fuel feed issues in negative G manoeuvres, like diving. Nosing down will cause the engine to choke out. Positive G manoeuvres like the Split-S are preferred. This issue will allow enemies to out dive the Ki-27, so engaging at low altitudes is preferred.
 +
 
 +
Additionally, the Ki-27 runs hot and will overheat at 100% throttle on all but the coldest maps. To cool off, ease the throttle back to 40% or 50% and, if possible, try to gain altitude. If the engine overheats during a dogfight, try to break off if the opportunity presents itself. No pilot can outmanoeuvre on an overheated engine.
  
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Like the comparable [[A5M4]], the Ki-27's carburetor engine suffers from fuel feed issues in negative G maneuvers, like diving. Nosing down ''will'' cause the engine to choke out. Positive G maneuvers like the Split-S are preferred. This issue will allow enemies to out dive the Ki-27, so engaging at low altitudes is preferred.
+
Compared to the [[Ki-43-I]], it has marginally better manoeuvrability with a very low stall speed around 91 km/h (49 knots) with landing flaps deployed. However, the Ki-27 retains the power-to-weight ratio of the Ki-10 biplane, allowing it to climb very steeply at a 45° climb angle.
  
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Additionally, the Ki-27 runs hot and will overheat at 100% throttle on all but the coldest maps. To cool off, ease the throttle back to 40% or 50% and, if possible, try to gain altitude. If the engine overheats during a dog fight, try to break off if the opportunity presents itself. No pilot can outmaneuver an overheated engine.
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{| class="wikitable" style="text-align:center" width="70%"
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== General info ==
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! rowspan="2" | Characteristics
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=== Flight Performance ===
 
−
<!--''Describe how the aircraft behaves in the air. Maximum speed, maneuverability, speed and allowable loads - these are the most important characteristics of the vehicle.''-->
 
−
{| class="wikitable" style="text-align:center"
 
−
|-
 
−
! colspan="8" | Characteristics
 
−
|-
 
−
! colspan="8" | ''Stock''
 
−
|-
 
 
! colspan="2" | Max Speed<br>(km/h at 3,500 m)
 
! colspan="2" | Max Speed<br>(km/h at 3,500 m)
−
! rowspan="2" | Max altitude<br>(meters)
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! 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)
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! colspan="2" | Rate of climb<br>(metres/second)
−
! rowspan="2" |Take-off run<br>(meters)
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! rowspan="2" | Take-off run<br>(metres)
 
|-
 
|-
−
! AB
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! AB !! RB !! AB !! RB !! AB !! RB
−
! RB
 
−
! AB
 
−
! RB
 
−
! AB
 
−
! RB
 
 
|-
 
|-
−
| 476 || 465 || {{Specs|ceiling}} || 10.4 || 11.0 || 6.2 || 8.8 || 180
+
! Stock
 +
| 476 || 465 || rowspan="2" | {{Specs|ceiling}} || 10.2 || 10.6 || 8.5 || 8.5 || rowspan="2" | 180
 
|-
 
|-
−
! colspan="8" | ''Upgraded''
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! Upgraded
−
|-
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| 517 || 495 || 9.8 || 10.0 || 18.6 || 12.8
−
! colspan="2" | Max Speed<br>(km/h at 3,500 m)
 
−
! rowspan="2" |Max altitude (meters)
 
−
! colspan="2" | Turn time (seconds)
 
−
! colspan="2" | Rate of climb<br>(meters/second)
 
−
! rowspan="2" |Take-off run (meters)
 
−
|-
 
−
! AB
 
−
! RB
 
−
! AB
 
−
! RB
 
−
! AB
 
−
! RB
 
−
|-
 
−
| ? || ? || {{Specs|ceiling}} || ??.? || ??.? || ??.? || ??.? || 180
 
 
|-
 
|-
 
|}
 
|}
  
−
====Details====
+
==== Details ====
−
{| class="wikitable" style="text-align:center"
+
{| class="wikitable" style="text-align:center" width="50%"
 
|-
 
|-
 
! colspan="5" | Features
 
! colspan="5" | Features
 
|-
 
|-
−
! Combat flap
+
! Combat flaps !! Take-off flaps !! Landing flaps !! Air brakes !! Arrestor gear
−
! Take-off flap
 
−
! Landing flap
 
−
! Air brakes
 
−
! Arrestor gear
 
 
|-
 
|-
−
| X || ✓ || ✓ || X || X    <!-- ✓ -->
+
| X || X || ✓ || X || X    <!-- ✓ -->
 
|-
 
|-
 
|}
 
|}
  
−
{| 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)
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! rowspan="2" | Wings (km/h)
−
! rowspan="2" | Gear limit<br>(km/h)
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! rowspan="2" | Gear (km/h)
−
! rowspan="2" | Combat flap<br> (km/h)
+
! colspan="3" | Flaps (km/h)
 
! colspan="2" | Max Static G
 
! colspan="2" | Max Static G
 
|-
 
|-
−
! +
+
! Combat !! Take-off !! Landing !! + !! -
−
! -
 
 
|-
 
|-
−
| {{Specs|разрушение|конструкции}} || {{Specs|разрушение|шасси}} || 350 || ~18 || ~12
+
| {{Specs|destruction|body}} || {{Specs|destruction|gear}} || N/A || N/A || 220 || ~10 || ~7
 
|-
 
|-
 
|}
 
|}
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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)
 
 
|-
 
|-
−
| < 350 || < 350 || < 350 || > 260?
+
| < 350 || < 350 || < 350 || > 296
 
|-
 
|-
 
|}
 
|}
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! WEP Engine power
 
! WEP Engine power
 
|-
 
|-
−
| 3,,300 m || 680 hp || 816 hp  
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| 3,300 m || 705 hp || 846 hp
−
|-
 
−
<!--! colspan="3" | Setting 2
 
−
|-
 
−
! Optimal altitude
 
−
! 100% Engine power
 
−
! WEP Engine power
 
−
|-
 
−
| ?,??? m || ?,??? hp || ?,??? hp
 
−
|-
 
−
! colspan="3" | Setting 3
 
−
|-
 
−
! Optimal altitude
 
−
! 100% Engine power
 
−
! WEP Engine power
 
 
|-
 
|-
−
| ?,??? m || ?,??? hp || ?,??? hp
 
−
|- -->
 
 
|}
 
|}
  
 
=== 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. Describe the armour, if there is any, also mention the vulnerability of other critical aircraft systems.''-->
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{{Specs-Avia-Armour}}
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* No armour plating
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<!-- ''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 glazing
+
The Ki-27 does not have any armour, so your great turn rate is the only real defence. The fuel tanks aren't self-sealing either, which only strengthens the need to use your great turn rate. There is one fuel tank above and behind the oil cooling system; the rest are in the wings, with 2 in each wing.
−
* Critical components located at front of aircraft (fuel, pilot, engine, controls)
+
 
−
* More fuel tanks located in wings near fuselage
+
=== Modifications and economy ===
 +
{{Specs-Economy}}
 +
 
 +
At this rank, the order of research is mainly personal preference, though the Ki-27 Otsu will benefit significantly from defensive and performance enhancing modifications.
  
 
== Armaments ==
 
== Armaments ==
 +
{{Specs-Avia-Armaments}}
 
=== Offensive armament ===
 
=== Offensive armament ===
−
<!--''Describe the offensive armament of the aircraft, if any. Describe how effective the cannons and machine guns are in a battle, and also what belts or drums are better to use. If there is no offensive weaponry, delete this subsection.''-->
+
{{Specs-Avia-Offensive}}
−
{{main|Type 89 army (7.7 mm)}}
+
<!-- ''Describe the offensive armament of the aircraft, if any. Describe how effective the cannons and machine guns are in a battle, and also what belts or drums are better to use. If there is no offensive weaponry, delete this subsection.'' -->
 +
{{main|Type 89 (7.7 mm)}}
  
 
The '''''{{PAGENAME}}''''' is armed with:
 
The '''''{{PAGENAME}}''''' is armed with:
  
−
* 2 x 7.7 mm Type 89 machine guns, nose mounted (500 rpg = 1,000 total)
+
* 2 x 7.7 mm Type 89 machine guns, nose-mounted (500 rpg = 1,000 total)
  
−
<!--=== Suspended armament ===
+
== Usage in battles ==
−
''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 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).'' -->
−
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;''Main article:&nbsp;'''[[:Category:Suspended armaments|Bombs]]'''''
+
A superior dogfighter for turnfighting, the Ki-27 is the first plane to begin showing the features typical of the Japanese [[A6M2|"Zero"]] but with none of the bite. Its speed and manoeuvrability are plagued by engine problems, with no armour and a standard armament.
  
−
=== Defensive armament ===
+
In battle, no Allied fighter can outturn you, except for biplanes, but most will outgun you (and even most biplanes match the Ki-27 in armament).
−
''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.''
 
−
-->
 
−
== Usage in the battles ==
 
−
<!--''Describe the tactics of playing in an aircraft, the features of using vehicles in a team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but 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).''-->
 
−
A superior dogfighter for turn-fighting, the Ki-27 is the first plane to begin showing the features typical of the Japanese "[[A6M2|Zero]]" but with none of the bite. Its speed and maneuverability are plagued by engine problems, with no armour and a mediocre armament.
 
  
−
In battle, no Allied fighter can out-turn you, except for biplanes, but most will outgun you (and even most biplanes match the Ki-27 in armament).
+
Biplanes make easy prey for the Ki-27, and it can easily outmanoeuvre the [[P-36C]], the [[F2A-1]] and the [[I-16 type 24]], but their stronger armaments will knock out a Ki-27 in a single good burst. Simply outrunning any of them is an excellent evasive manoeuvre. [[Hurricane Mk I/L]]s can strictly compete with the Ki-27 Otsu in manoeuvrability, but the Hurricane's heavier armament (four times that of the Ki-27) can also quickly shred a Ki-27. Additionally, outrunning a Hurricane in a Ki-27 is not possible. The [[I-15bis]] will be the bane of a Ki-27s existence, as their excellent turning ability will force it into energy bleeding manoeuvres or Boom & Zoom style combat.
  
−
Bi-planes (except the I-153 Chaika) make easy prey for the Ki-27, and the Ki-27 can easily outmaneuver the [[P-36C|P-36 Hawk]], the [[F2A-1|F2A Brewster Buffalo]] and the [[I-16 type 24|I-16 Ishak]], but their heavier armaments will knock out a Ki-27 in a single good burst. Simply outrunning any of them is a good evasive maneuver. [[Hurricane Mk I]]s can closely complete with the Ki-27 otsu in maneuverability, but the Hurricane's heavier armament (four times what the ''Nate'' has) can also quickly shred a Ki-27. Additionally, outrunning a Hurricane in a Ki-27 is just not possible. [[I-15bis|I-15]]s, which the Ki-27 historically outperformed, will be the bane of a Ki-27s existence, as their excellent turn ability will force the Nate to energy bleeding maneuvers or Boom & Zoom style combat. Risky with competition around to abuse either state.
+
;Enemies worth noting
  
−
Despite its low {{Battle-rating|1}}, you can face some very difficult foes when flying the Ki-27. Bi-planes will give you a run for your money in terms of maneuverability, while some early mono-planes will be faster and more heavily armed than you. Therefore, it is important to judge your foes accordingly.  
+
Despite its low battle rating, you can face some challenging foes when flying the Ki-27. Biplanes will give you a run for your money in terms of manoeuvrability, while some early monoplanes will be faster and more heavily armed than you. Therefore, it is important to judge your foes accordingly.
  
−
+
From America, you will face the [[P-26 (Family)|P-26]]. They are quite good divers and have a decent roll rate, but will not be able to outmanoeuvre you in a turn fight. The [[P-36 (Family)|P-36]] is more challenging. Faster and well-armed, you will have to rely on your turn rate to try and outmanoeuvre them.
−
One of the most challenging opponents is the ''[[I-153 M-62|Chaika]]''. It is not a mere upgraded [[I-15bis]], but in all performance aspects ''equal'' to the Nakajima Ki-27 fighter. Also on the Russian side, the Mig-3 is a big threat. It is one of the fastest aircraft in its battle rating and has decent armament. In skilled hands it can be an almost impossible opponent to combat, especially when using Boom & Zoom tactics against you. Your only defense will be to try and out maneuver it or to lure it into a turn fight. The I-16 is also a common opponent.\
 
  
−
From America, you will face the P-26. They are quite good divers and have a decent roll rate, but will not be able to outmaneuver you in a turn fight. The P-36 is more challenging. Faster and well armed, you will have to rely on your turn rate to try and out maneuver them.
+
Then from Germany you also have the He 100 D-1, which is fast. Its energy energy retention is good as which means that it will bleed speed far slower than you. The best way to fight it is to lure it into a dogfight to bleed its energy. If the He 100 D-1 breaks off the engagement, runs away and is out of your shooting distance, you should just break off too but be prepared for it to come back.
−
===Manual Engine Control===
+
 
 +
One of the most challenging opponents is the [[I-153 M-62]] Chaika. It is not a mere upgraded [[I-15bis]], but in all performance aspects equal to the Nakajima Ki-27 fighter. Also on the Soviet side, the [[MiG-3 (Family)|MiG-3]] is a significant threat. It is one of the fastest aircraft in its battle rating and has powerful armament. In skilled hands, it can be an almost impossible opponent to combat, especially when using Boom & Zoom tactics against you. Your only defence will be to try and outmanoeuvre it or to lure it into a turnfight.
 +
 
 +
=== Manual Engine Control ===
 
{| class="wikitable" style="text-align:center"
 
{| class="wikitable" style="text-align:center"
 
|-
 
|-
 
! colspan="7" | MEC elements
 
! colspan="7" | MEC elements
 
|-
 
|-
−
! rowspan="2" |Mixer
+
! rowspan="2" | Mixer
−
! rowspan="2" |Pitch
+
! rowspan="2" | Pitch
−
! colspan="3" |Radiator
+
! colspan="3" | Radiator
−
! rowspan="2" |Supercharger
+
! rowspan="2" | Supercharger
−
! rowspan="2" |Turbocharger
+
! rowspan="2" | Turbocharger
 
|-
 
|-
−
! Oil
+
! Oil !! Water !! Type
−
! Water
 
−
! Type  
 
 
|-
 
|-
−
| Controllable || rowspan="2" | Not controllable || rowspan="2" | Not controllable || rowspan="2" | Not controllable || rowspan="2" | Separate || rowspan="2" | Not ontrollable || rowspan="2" | Not controllable
+
| Controllable || Controllable<br>Not auto controlled || Controllable<br>Not auto controlled || Controllable<br>Not auto controlled || Separate || Not controllable<br>1 gear || Not controllable
 
|-
 
|-
 
|}
 
|}
  
−
===Modules===
 
−
{| class="wikitable"
 
−
!colspan = "1"| Tier
 
−
!colspan = "2"| Flight performance
 
−
!colspan = "1"| Survivability
 
−
!colspan = "1"| Weaponry
 
−
|-
 
−
| I
 
−
| Fuselage Repair
 
−
| Radiator
 
−
|
 
−
| Offensive 7 mm
 
−
|-
 
−
| II
 
−
|
 
−
| Compressor
 
−
| Airframe
 
−
|
 
−
|-
 
−
| III
 
−
| Wings Repair
 
−
| Engine
 
−
|
 
−
| New 7 mm MGs
 
−
|-
 
−
| IV
 
−
|
 
−
| Engine Injection
 
−
| Cover
 
−
|
 
−
|-
 
−
|}
 
−
* At this rank, order of research is largely personal preference, though the Ki-27 otsu will benefit greatly from defensive and performance enhancing modifications.
 
 
=== Pros and cons ===
 
=== Pros and cons ===
−
<!--''Summarize and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Do not use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - they have a substitution in the form of softer "inadequate", "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:'''
−
* Great maneuverability, on par with biplanes
+
 
 +
* Great manoeuvrability, on par with biplanes
 
* Good stability in turns
 
* Good stability in turns
 
* Good speed, for its tier
 
* Good speed, for its tier
 +
* Excellent climb rate
  
 
'''Cons:'''
 
'''Cons:'''
−
* Limited climb
+
 
 
* Limited firepower
 
* Limited firepower
 
* Engine overheats rapidly on hot maps
 
* Engine overheats rapidly on hot maps
−
* Engine chokes in negative g dives
+
* Engine chokes in negative G dives
 
* No armour
 
* No armour
  
 
== 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 big, take it to a separate article, taking a link to an article about the vehicle and adding a block "/ historical reference" (example: https://wiki.warthunder.com/Name-vehicles/historical reference) and add a link to it here using the <code>main</code> template. Be sure to include links to sources at the end of the article.''-->
+
<!-- ''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).'' -->
−
The Nakajima Ki-27 otsu began as the Ki-11, a competitor for the [[Ki-10-I|Kawasaki Ki-10]] biplane. While faster and more modern than the Ki-10 biplane, the Ki-11 wasn't adopted because the Imperial Japanese Army valued maneuverability over speed. Nakajima continued development of the design before finalizing the Ki-12, a modern monoplane with liquid-cooled engine and retractable landing gear, but the Army denied it outright as too maintenance heavy for forward airbases in Manchurian and China. The redesigned plane instead featured a radial air-cooled engine, fixed landing gear and fully enclosed cockpit and received the designation Ki-27.  
+
=== Development ===
 +
The Nakajima Ki-27 otsu began as the Ki-11, a competitor for the [[Ki-10-I|Kawasaki Ki-10]] biplane. While faster and more modern than the Ki-10 biplane, the Ki-11 wasn't adopted because the Imperial Japanese Army valued manoeuvrability over speed. Nakajima continued development of the design before finalising the Ki-12, a modern monoplane with a liquid-cooled engine and retractable landing gear, but the Army denied it outright as too maintenance heavy for forward airbases in Manchuria and China. The redesigned plane instead featured a radial air-cooled engine, fixed landing gear and fully enclosed cockpit and received the designation Ki-27.
  
−
In 1936, the Ki-27 competed against the Kawasaki Ki-28 (a prototype design fated to never enter production) and the Mitsubishi Ki-33 (a de-navalized [[A5M4|A5M]]). While the Ki-33 outperformed the Ki-27 in most regards, the Imperial Japanese Army was loathe to adopt a "navy fighter", and adopted the Ki-27 with minor modifications. The Ki-27 entered service as the Army Type 97 Fighter.
+
In 1936, the Ki-27 competed against the Kawasaki Ki-28 (a prototype design fated to never enter production) and the Mitsubishi Ki-33 (a de-navalised [[A5M4|A5M]]). While the Ki-33 outperformed the Ki-27 in most regards, the Imperial Japanese Army was loath to adopt a "navy fighter", and approved the Ki-27 with minor modifications. The Ki-27 entered service as the Army Type 97 Fighter.
  
−
While the Ki-10 would not be finally phased out from front line service until 1942, by 1940 the Ki-27 was the premiere army fighter on the front lines. It was unmatched by any plane in the Chinese air force inventory, and outperformed the Soviet [[I-15bis|I-15]] and [[I-16 type 18|I-16]] fighters in the Battles of Khalkhin Gol, with some pilots scoring 11 kills against Soviet planes in a single day. Against Chinese Curtiss [[P-36A|P-36 Hawks]], veteran Ki-27 pilots achieved similar, but not as impressive kill rates.
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=== Service History ===
 +
While the Ki-10 would not be finally phased out from front line service until 1942, by 1940, the Ki-27 was the primary army fighter on the front lines. It was unmatched by any plane in the Chinese air force inventory, and outperformed the Soviet [[I-15 (Family)|I-15]] and [[I-16 (Family)|I-16]] fighters in the Battles of Khalkhin Gol, with some pilots scoring 11 kills against Soviet planes in a single day. Against Chinese Curtiss [[P-36A|P-36 Hawks]], veteran Ki-27 pilots achieved similar, but not as impressive kill rates.
  
−
Over China, the Ki-27 was unmatched until the deployment of the [[P-40E-1|P-40 Warhawks]] with the American Volunteer Group. After, America's entry into the war, the Ki-27 also fared poorly against the US Navy's F2A Brewster Buffalo and F4F Wildcat, and was removed from most front line service within the first months of the war, replaced by the much improved Ki-43. However, it remained a front line fighter in Thai service, where the Ki-27 scored recorded kills against [[P-51D-30|P-51]]s and at least one [[P-38G-1|P-38]].
+
Over China, the Ki-27 was unmatched until the deployment of the [[P-40E-1|P-40 Warhawks]] with the American Volunteer Group. After America's entry into the war, the Ki-27 also fared poorly against the US Navy's F2A Brewster Buffalo and F4F Wildcat and was removed from most front line service within the first months of the war, replaced by the much-improved Ki-43. However, it remained a front line fighter in Thai service, where the Ki-27 scored recorded kills against [[P-51D-30|P-51]]s and at least one [[P-38G-1|P-38]].
  
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Because of their high production numbers and relatively few losses, Ki-27 would see a renewed role late in the war as Kamikaze planes.  
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Because of their high production numbers and relatively few losses, Ki-27 would see a renewed role late in the war as Kamikaze planes.
  
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=== Ingame description ===
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== Media ==
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        <div class="description">@var:description</div>
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<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->
  
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The '''Nakajima Ki-27''' (九七式戦闘機 Kyūnana-shiki sentōki, or Type 97 Fighter; Allied Codename "''Nate''") was the main fighter aircraft used by the Imperial Japanese Army Air Force up until 1940. Its Allied nickname was "Nate".
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;Skins
  
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The Japanese achieved air superiority over China and threatened even the Soviets with the Ki-27 when it was first introduced. Nothing the Chinese or Soviets had available to them were able to match the Ki-27's ability to dogfight effectively, and the kill ratio of the Ki-27 was high.
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* [https://live.warthunder.com/feed/camouflages/?vehicle=ki-27_otsu Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]
  
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Note: The Ki-27 was the main Japanese fighter used in the Battles of Khalkin Gol, though this is not yet reflected (as of 4/2/2015) in War Thunder's Dynamic Campaign mode, which has Ki-10's and [[Ki-43-II Hayabusa|Ki-43]]'s, likely due to the fact that the Ki-27 arrived in a later patch.
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== See also ==
 +
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
  
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The version in War Thunder has fuel "bumps" integrated into the plane.
 
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== Media ==
 
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''An excellent addition to the article will be video guides, as well as screenshots from the game and photos.''
 
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== Read also ==
 
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''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;''
 
* ''reference to the series of the aircraft;''
 
* ''links to approximate analogues of other nations and research trees.''
 
* ''links to approximate analogues of other nations and research trees.''
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<!--''ETC.''-->
 
  
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== Sources ==
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== External links ==
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''Paste links to sources and external resources, such as:''
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<!-- ''Paste links to sources and external resources, such as:''
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
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* ''page on aircraft encyclopedia;''
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* ''other literature.'' -->
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* ''other literature.''
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* [https://forum.warthunder.com/index.php?/topic/202077-nakajima-ki-27-otsu/ Official data sheet - more details about the performance]
 +
* [[wikipedia:Nakajima_Ki-27|[Wikipedia] Nakajima Ki-27]]
  
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{{AirManufacturer Nakajima}}
 
{{Japan fighters}}
 
{{Japan fighters}}

Latest revision as of 13:17, 7 September 2023

Rank VI USA | Premium | Golden Eagles
A-10A Thunderbolt (Early)
This page is about the Japanese fighter Ki-27 otsu. For other variants, see Ki-27 (Family).
Ki-27 otsu
ki-27_otsu.png
GarageImage Ki-27 otsu.jpg
ArtImage Ki-27 otsu.jpg
Ki-27 otsu
Japan flag.png Japan
I Rank
Battle rating:
AB RB SB
1.3 2.0 1.3
Class:
Research:2 900 Specs-Card-Exp.png
Purchase:700 Specs-Card-Lion.png
Show in game

Description

The Ki-27 otsu, designated as Type 97 Fighter (九七式戦闘機), was a monoplane fighter aircraft designed by Nakajima Aircraft Company for the Imperial Japanese Army Air Service in 1937. It was the Army's first monoplane fighter and had a low wing loading that gave it excellent manoeuvrability. The Ki-27 served as the main fighter of the Japanese Army until 1940, and participated in battles over China, Mongolia, Southeast Asia and the early stages of the Pacific War. It gained air superiority against Chinese and Soviet fighters, but was outperformed by newer Allied planes. The Ki-27 was also operated by Manchukuo, Thailand, and the Reformed Government of the Republic of China. A total of 3,368 Ki-27s were produced before production ceased in 1942, when it was replaced by the Ki-43 in frontline service and relegated to training and reserves.

It was introduced in Update 1.43. The Ki-27 distinguishes itself as a low-level dogfighter: its performance below 1,000 m is superb and it can manoeuvre away from nearly any other comparable fighter. Like the Ki-10 series before it, the Ki-27 otsu suffers from its poor armament (twin 7.7 mm Type 89s) and weak armour, which means it makes for a poor interceptor despite its high speed, but the Ki-27 makes an excellent escort for bombers and flying boats to provide cover for their allied bombers.

Nicknames
  • IJA Pilot Abbreviation: Kyū-Nana Sen (九七戦, "9-7 Fighter").
  • Allied reporting name: Nate
  • CBI reporting name: Abdul

General info

Flight performance

Max speed
at 3 500 m495 km/h
Turn time10 s
Max altitude8 500 m
EngineNakajima Kotobuki 41
TypeRadial
Cooling systemAir
Take-off weight2 t

Like its Ki-10 predecessor, the Ki-27 relies on its manoeuvrability for its survival. Therefore, turnfighting is vital for a Ki-27 pilot. Avoid diving on opponents, due to the Ki-27's fuel feed issues, and focus on scaring enemy pursuers away from bombers rather than chasing a kill. A lone Ki-27 is easy prey for allied energy fighters. Like most Japanese fighters, engaging an enemy head-on is not recommended. If fighting an enemy energy fighter head-on, a good strategy is to turn away (usually a slight turn as you'll want him to miss you, but also pass you), and hope that he turns to follow.

Like the comparable A5M4, the Ki-27's carburettor engine suffers from fuel feed issues in negative G manoeuvres, like diving. Nosing down will cause the engine to choke out. Positive G manoeuvres like the Split-S are preferred. This issue will allow enemies to out dive the Ki-27, so engaging at low altitudes is preferred.

Additionally, the Ki-27 runs hot and will overheat at 100% throttle on all but the coldest maps. To cool off, ease the throttle back to 40% or 50% and, if possible, try to gain altitude. If the engine overheats during a dogfight, try to break off if the opportunity presents itself. No pilot can outmanoeuvre on an overheated engine.

Compared to the Ki-43-I, it has marginally better manoeuvrability with a very low stall speed around 91 km/h (49 knots) with landing flaps deployed. However, the Ki-27 retains the power-to-weight ratio of the Ki-10 biplane, allowing it to climb very steeply at a 45° climb angle.

Characteristics Max Speed
(km/h at 3,500 m) 		Max altitude
(metres) 		Turn time
(seconds) 		Rate of climb
(metres/second) 		Take-off run
(metres)
AB RB AB RB AB RB
Stock 476 465 8500 10.2 10.6 8.5 8.5 180
Upgraded 517 495 9.8 10.0 18.6 12.8

Details

Features
Combat flaps Take-off flaps Landing flaps Air brakes Arrestor gear
X X ✓ X X
Limits
Wings (km/h) Gear (km/h) Flaps (km/h) Max Static G
Combat Take-off Landing + -
554 550 N/A N/A 220 ~10 ~7
Optimal velocities (km/h)
Ailerons Rudder Elevators Radiator
< 350 < 350 < 350 > 296
Compressor (RB/SB)
Setting 1
Optimal altitude 100% Engine power WEP Engine power
3,300 m 705 hp 846 hp

Survivability and armour

Crew1 person
Speed of destruction
Structural554 km/h
Gear550 km/h

The Ki-27 does not have any armour, so your great turn rate is the only real defence. The fuel tanks aren't self-sealing either, which only strengthens the need to use your great turn rate. There is one fuel tank above and behind the oil cooling system; the rest are in the wings, with 2 in each wing.

Modifications and economy

Repair costBasic → Reference
AB103 → 128 Sl icon.png
RB184 → 230 Sl icon.png
SB113 → 141 Sl icon.png
Total cost of modifications2 970 Rp icon.png
895 Sl icon.png
Talisman cost190 Ge icon.png
Crew training200 Sl icon.png
Experts1 000 Sl icon.png
Aces20 Ge icon.png
Research Aces96 000 Rp icon.png
Reward for battleAB / RB / SB
10 / 20 / 60 % Sl icon.png
100 / 100 / 100 % Rp icon.png
Modifications
Flight performance Survivability Weaponry
Mods aerodinamic fuse.png
Fuselage repair
Research:
200 Rp icon.png
Cost:
60 Sl icon.png
40 Ge icon.png
Mods radiator.png
Radiator
Research:
200 Rp icon.png
Cost:
60 Sl icon.png
40 Ge icon.png
Mods compressor.png
Compressor
Research:
330 Rp icon.png
Cost:
100 Sl icon.png
65 Ge icon.png
Mods aerodinamic wing.png
Wings repair
Research:
250 Rp icon.png
Cost:
75 Sl icon.png
50 Ge icon.png
Mods new engine.png
Engine
Research:
250 Rp icon.png
Cost:
75 Sl icon.png
50 Ge icon.png
Mods metanol.png
Engine injection
Research:
480 Rp icon.png
Cost:
145 Sl icon.png
95 Ge icon.png
Mods armor frame.png
Airframe
Research:
330 Rp icon.png
Cost:
100 Sl icon.png
65 Ge icon.png
Mods armor cover.png
Cover
Research:
480 Rp icon.png
Cost:
145 Sl icon.png
95 Ge icon.png
Mods ammo.png
type89_belt_pack
Research:
200 Rp icon.png
Cost:
60 Sl icon.png
40 Ge icon.png
Mod arrow 1.png
Mods weapon.png
type89_new_gun
Research:
250 Rp icon.png
Cost:
75 Sl icon.png
50 Ge icon.png

At this rank, the order of research is mainly personal preference, though the Ki-27 Otsu will benefit significantly from defensive and performance enhancing modifications.

Armaments

Offensive armament

Weapon 12 x 7.7 mm Type 89 machine gun
Ammunition1 000 rounds
Fire rate900 shots/min
Main article: Type 89 (7.7 mm)

The Ki-27 otsu is armed with:

  • 2 x 7.7 mm Type 89 machine guns, nose-mounted (500 rpg = 1,000 total)

Usage in battles

A superior dogfighter for turnfighting, the Ki-27 is the first plane to begin showing the features typical of the Japanese "Zero" but with none of the bite. Its speed and manoeuvrability are plagued by engine problems, with no armour and a standard armament.

In battle, no Allied fighter can outturn you, except for biplanes, but most will outgun you (and even most biplanes match the Ki-27 in armament).

Biplanes make easy prey for the Ki-27, and it can easily outmanoeuvre the P-36C, the F2A-1 and the I-16 type 24, but their stronger armaments will knock out a Ki-27 in a single good burst. Simply outrunning any of them is an excellent evasive manoeuvre. Hurricane Mk I/Ls can strictly compete with the Ki-27 Otsu in manoeuvrability, but the Hurricane's heavier armament (four times that of the Ki-27) can also quickly shred a Ki-27. Additionally, outrunning a Hurricane in a Ki-27 is not possible. The I-15bis will be the bane of a Ki-27s existence, as their excellent turning ability will force it into energy bleeding manoeuvres or Boom & Zoom style combat.

Enemies worth noting

Despite its low battle rating, you can face some challenging foes when flying the Ki-27. Biplanes will give you a run for your money in terms of manoeuvrability, while some early monoplanes will be faster and more heavily armed than you. Therefore, it is important to judge your foes accordingly.

From America, you will face the P-26. They are quite good divers and have a decent roll rate, but will not be able to outmanoeuvre you in a turn fight. The P-36 is more challenging. Faster and well-armed, you will have to rely on your turn rate to try and outmanoeuvre them.

Then from Germany you also have the He 100 D-1, which is fast. Its energy energy retention is good as which means that it will bleed speed far slower than you. The best way to fight it is to lure it into a dogfight to bleed its energy. If the He 100 D-1 breaks off the engagement, runs away and is out of your shooting distance, you should just break off too but be prepared for it to come back.

One of the most challenging opponents is the I-153 M-62 Chaika. It is not a mere upgraded I-15bis, but in all performance aspects equal to the Nakajima Ki-27 fighter. Also on the Soviet side, the MiG-3 is a significant threat. It is one of the fastest aircraft in its battle rating and has powerful armament. In skilled hands, it can be an almost impossible opponent to combat, especially when using Boom & Zoom tactics against you. Your only defence will be to try and outmanoeuvre it or to lure it into a turnfight.

Manual Engine Control

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

Pros and cons

Pros:

  • Great manoeuvrability, on par with biplanes
  • Good stability in turns
  • Good speed, for its tier
  • Excellent climb rate

Cons:

  • Limited firepower
  • Engine overheats rapidly on hot maps
  • Engine chokes in negative G dives
  • No armour

History

Development

The Nakajima Ki-27 otsu began as the Ki-11, a competitor for the Kawasaki Ki-10 biplane. While faster and more modern than the Ki-10 biplane, the Ki-11 wasn't adopted because the Imperial Japanese Army valued manoeuvrability over speed. Nakajima continued development of the design before finalising the Ki-12, a modern monoplane with a liquid-cooled engine and retractable landing gear, but the Army denied it outright as too maintenance heavy for forward airbases in Manchuria and China. The redesigned plane instead featured a radial air-cooled engine, fixed landing gear and fully enclosed cockpit and received the designation Ki-27.

In 1936, the Ki-27 competed against the Kawasaki Ki-28 (a prototype design fated to never enter production) and the Mitsubishi Ki-33 (a de-navalised A5M). While the Ki-33 outperformed the Ki-27 in most regards, the Imperial Japanese Army was loath to adopt a "navy fighter", and approved the Ki-27 with minor modifications. The Ki-27 entered service as the Army Type 97 Fighter.

Service History

While the Ki-10 would not be finally phased out from front line service until 1942, by 1940, the Ki-27 was the primary army fighter on the front lines. It was unmatched by any plane in the Chinese air force inventory, and outperformed the Soviet I-15 and I-16 fighters in the Battles of Khalkhin Gol, with some pilots scoring 11 kills against Soviet planes in a single day. Against Chinese Curtiss P-36 Hawks, veteran Ki-27 pilots achieved similar, but not as impressive kill rates.

Over China, the Ki-27 was unmatched until the deployment of the P-40 Warhawks with the American Volunteer Group. After America's entry into the war, the Ki-27 also fared poorly against the US Navy's F2A Brewster Buffalo and F4F Wildcat and was removed from most front line service within the first months of the war, replaced by the much-improved Ki-43. However, it remained a front line fighter in Thai service, where the Ki-27 scored recorded kills against P-51s and at least one P-38.

Because of their high production numbers and relatively few losses, Ki-27 would see a renewed role late in the war as Kamikaze planes.

Media

Skins

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


Nakajima Aircraft Company (中島飛行機株式会社 )
Fighters  Ki-27 otsu · Ki-27 otsu Tachiarai
  Ki-43-I · Ki-43-II · Ki-43-III otsu
  Ki-44-I · Ki-44-I 34 · Ki-44-II otsu · Ki-44-II hei
  Ki-84 ko · Ki-84 otsu · Ki-84 hei
  Ki-87
Hydroplanes  A6M2-N*
Interceptors  J1N1 · J5N1
Bombers  B5N2
  B6N1 Model 11 · B6N2 Model 12 · B6N2a Model 12Ko
  G5N1 · G8N1
  Ki-49-I · Ki-49-IIa · Ki-49-IIb · Ki-49-IIb/L
Recon  E8N2
Jet Fighters  Kikka
Captured  ␗Ki-27 otsu · ▃Ki-43-II · ␗Ki-43-III ko · ␗Ki-44-II hei · ␗Ki-84 ko
  *Refit of the Mitsubishi A6M2 mod. 11
See also  Fuji Heavy Industries (1957-2017)

Japan fighters
Navy 
Carrier-based fighter 
A5M  A5M4 · Hagiri's A5M4
A6M  A6M2 mod. 11 · A6M2 · A6M3 · A6M3 mod. 22 · A6M3 mod. 22Ko · A6M5 · A6M5 Ko · A6M5 otsu · A6M5 Hei · A6M6c
A7He  A7He1*
A7M  A7M1 (NK9H) · A7M2
Land-based Fighter 
J2M  J2M2 · J2M3 · J2M4 Kai · J2M5 · J2M5 (30 mm)
J6K  J6K1
J7W  J7W1
N1K-J  N1K1-Ja · N1K2-J · N1K2-Ja
Fighter seaplane 
N1K  N1K1
A6M-N  A6M2-N
Army 
Ki-10  Ki-10-I · Ki-10-I C · Ki-10-II · Ki-10-II C
Ki-27  Ki-27 otsu · Ki-27 otsu Tachiarai
Ki-43  Ki-43-I · Ki-43-II · Ki-43-III otsu
Ki-44  Ki-44-I · Ki-44-I 34 · Ki-44-II otsu · Ki-44-II hei
Ki-61  Ki-61-I ko · Ki-61-I otsu · Ki-61-I hei · Tada's Ki-61-I hei · Ki-61-I tei · Ki-61-II Otsu Kai
Ki-84  Ki-84 ko · Ki-84 otsu · Ki-84 hei
Ki-87  Ki-87
Ki-94  Ki-94-II
Ki-100  Ki-100 · Ki-100-II
Other countries  ▅F4U-1A · ▅P-51C-11-NT · ▅Bf 109 E-7 · ▅Fw 190 A-5
  *Imported designation of the He 112 (A6M was in development - A7M would take A7 designation after the cancelation of the A7He)

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