Ki-27 otsu (China)

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This page is about the Chinese fighter Ki-27 otsu (China). For other variants, see Ki-27 (Family).
GarageImage Ki-27 otsu (China).jpg
␗Ki-27 otsu
1.3 2.0 1.3
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The ␗Ki-27 otsu, officially known as 中島 九七式戦闘機乙型 or by its Allies codename Nate, was one of the major type of fighters served in IJAAS during the early stages of 2nd Sino-Japanese War and been used by both factions of Chinese armed forces. As the replacement of previous Ki-10 biplane after IJAAS saw the potential of IJNAS's A6M, although still being manoeuvrable at the early stages, the major loss in Khalkhin Gol made IJAAS retired all Ki-27, leaving them as reserve aircraft of the puppet state of Manchuria; while the lack of spare parts and more advanced Japanese-captured/US Aid aircrafts didn't leave Ki-27 a chance as fighters for the Nationalist forces, the Communist side made good use of them as trainer aircrafts for engineers and pilots.

Introduced in Update 1.91 "Night Vision" with the Chinese tech tree; it performs exactly like its Japanese counterpart with excellent maneuverability, but players need to pay extra caution on any aircrafts with better engine or with higher energy (i.e. at higher altitude), preying on targets which have been baited into lower altitude can earn quick victories on them or helping to disable them for kill assists.

General info

Flight performance

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

This aircraft is typical of Japanese fighter design: light armour and tight manoeuvrability. This aircraft can out-turn most other fighters of rank 1-2. It dances away from the line of fire with extreme agility, and can strike from high angles with ease.

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


Combat flaps Take-off flaps Landing flaps Air brakes Arrestor gear
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

Typical of low-rank Japanese fighter design, this aircraft has no armour. Due to this, most calibres found in ranks 1 and 2 will make quick work of this plane. Don't let this sway you away from this plane, it makes up for its lack of armour with extreme manoeuvrability. The fuel tanks are not self-sealing. There are 2 in each wing, and a 5th one located close to the oil cooling system.

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
Flight performance Survivability Weaponry
Mods aerodinamic fuse.png
Fuselage repair
200 Rp icon.png
60 Sl icon.png
40 Ge icon.png
Mods radiator.png
200 Rp icon.png
60 Sl icon.png
40 Ge icon.png
Mods compressor.png
330 Rp icon.png
100 Sl icon.png
65 Ge icon.png
Mods aerodinamic wing.png
Wings repair
250 Rp icon.png
75 Sl icon.png
50 Ge icon.png
Mods new engine.png
250 Rp icon.png
75 Sl icon.png
50 Ge icon.png
Mods metanol.png
Engine injection
480 Rp icon.png
145 Sl icon.png
95 Ge icon.png
Mods armor frame.png
330 Rp icon.png
100 Sl icon.png
65 Ge icon.png
Mods armor cover.png
480 Rp icon.png
145 Sl icon.png
95 Ge icon.png
Mods ammo.png
200 Rp icon.png
60 Sl icon.png
40 Ge icon.png
Mod arrow 1.png
Mods weapon.png
250 Rp icon.png
75 Sl icon.png
50 Ge icon.png


Offensive armament

Ammunition1 000 rounds
Fire rate900 shots/min
Main article: Type 89 army (7.7 mm)

The Ki-27 otsu (China) is armed with:

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

The two Type 89 machine guns are, unfortunately, pretty underwhelming for the fixed-wing fighter. The Ki-27 otsu will rarely meet aircraft that can be easily handled with just these two machine guns. Players will need the rely on the Ki-27's manoeuvrability to keep the opponent within the machine gun's reach to lay down sustained fire on critical components to cripple the enemy plane and get it to crash, or snipe the enemy pilot.

Usage in battles

A superior dogfighter for turn-fighting, 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 out-turn you, except for biplanes, but most will outgun you (and even most biplanes match the Ki-27 in armament).

Biplanes (except the I-153 Chaika) make easy prey for the Ki-27, and the Ki-27 can easily outmanoeuvre the P-36 Hawk, the F2A Brewster Buffalo and the I-16 Ishak, 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 Is can strictly complete 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. I-15s, which the Ki-27 historically outperformed, will be the bane of a Ki-27s existence, as their excellent turn ability will force it into energy bleeding manoeuvres or Boom & Zoom style combat. Risky with competition around to abuse either state.

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.

One of the most challenging opponents is the I-153 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 decent 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 turn fight. The I-16 is also a familiar 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 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.

Manual Engine Control

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

Pros and cons


  • Great manoeuvrability, on par with biplanes
  • Good stability in turns
  • Good speed, for its tier
  • Excellent climb, can reach above 20 m/s


  • Limited firepower
  • Engine overheats rapidly on hot maps
  • Engine chokes in negative-G dives
  • No armour
  • Mostly faces Japan in RB (facing equally or more manoeuvrable planes)


Service in Mainland China

The Ki-27 was used rather extensively on the Chinese soil by the IJAAS, since 1938 (Imperial year 2558), this type of aircraft has been deployed in different airfields in Mainland China. Where they were being used as frontline fighters, the puppet regime of Manchukuo also used Ki-27 as their fighters after the Japanese retired them from frontline use after severe loss in Khalkhin Gol.

The remaining Ki-27 that survived the war were captured by both KMT and PLA forces, but due to the already outdated performance in regards to the latest fighters and lack of spare parts for repair, these aircraft and its trainer variant (Manshu Ki-79) were mostly used as a trainer for training new pilots, especially for the Chinese Red Army in Northeastern China, where those pilots were becoming the foundation of the new PLAAF.



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
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)

China fighters
British  ␗Gladiator Mk I
French  D.510C
Japanese  ␗A6M2 · ␗Ki-27 otsu · ␗Ki-43-III ko · ␗Ki-44-II hei · ␗Ki-61-I otsu · ␗Ki-84 ko
American  CW-21 · Hawk III · P-66 · ␗P-40E-1 · H-81A-2 · ␗P-43A-1 · ␗P-47D-23-RA · ␗P-47D-30 · ␗P-51D-20 · ␗P-51K
Soviet  ␗I-15bis · ␗I-153 M-62 · ␗I-16 Chung 28 · ␗I-16 type 5 · ␗I-16 type 10 · ␗I-16 type 17 · ␗La-11 · ␗La-9