Ki-84 hei

Ki-84 hei

Ki-84 otsu

Ki-200

Ki-84 hei

Ki-84 otsu

Ki-200

Japan

IV Rank

Battle rating:

AB	RB	SB
7.7	6.3	6.3

Class:

Fighter

Research:63 000

Purchase:200 000

This page is about the aircraft Ki-84 hei. For other uses, see Ki-84 (Family).

Description

The Ki-84 hei Hayate is a rank IV Japanese fighter with a battle rating of 7.7 (AB) and 6.3 (RB/SB). This aircraft was introduced in Update 1.37.

General info

Flight Performance

The Hei Hayate is the exact same plane as the Ko and otsu - same good turn rate, climb rate, and compression. Having flown those two, the Hei Hayate is quite literally the exact same. As with the other two, use your excellent vertical energy retention and good maneuverability to your advantage. You can outturn all allies except the Merlin Spitfires and the P-59 using combat flaps. You still retain the OK roll rate and abysmal rudder of the other Hayates.

Characteristics	Max Speed (km/h at 6,000 m)		Max altitude (meters)	Turn time (seconds)		Rate of climb (meters/second)		Take-off run (meters)
	AB	RB		AB	RB	AB	RB
Stock	651	667	13000	20.2	20.8	14.2	14.2	421
Upgraded	718	692		19.1	19.4	22.6	17.9

Details

Features
Combat flap	Take-off flap	Landing flap	Air brakes	Arrestor gear
✓	✓	✓	X	X

Limits
Wing-break speed (km/h)	Gear limit (km/h)	Combat flap (km/h)	Max Static G
			+	-
837	270	???	~7.6	~3.6

Optimal velocities
Ailerons (km/h)	Rudder (km/h)	Elevators (km/h)	Radiator (km/h)
< ???	< ???	< ???	> ???

Compressor (RB/SB)
Setting 1
Optimal altitude	100% Engine power	WEP Engine power
?,??? m	??? hp	?,??? hp

Survivability and armour

• 70 mm sloped (66°) bulletproof glass in the windshield
• 13 mm steel plate behind the pilot seat
• 6 mm steel headrest

Armaments

Offensive armament

The Ki-84 hei Hayateis armed with:

• 2 x 30 mm Ho-155 cannons, wing-mounted (60 rpg = 120 total)
• 2 x 20 mm Ho-5 cannons, nose mounted (150 rpg = 300 total)

Suspended armament

The Ki-84 hei Hayatecan be outfitted with the following ordnance:

• Without load
• 2 x 50 kg Army type 94 GPHE bomb
• 2 x 250 kg Army type 92 GPHE bomb

Usage in battles

The Hei Hayate is the same great Hayate but with 2x 30 mm cannon instead of 2x20 mms. Although this might not seem too important, one hit from a HE 30mm shell will easily send your enemies to their doom. This solves the problem of the lacklustre 20 mms. When up-tiered to jets, focus on taking out propeller-powered aircraft. Climb high, and kill. Once all the props are down, look for furballs and/or ground-pounding jets. Swoop down on these people and destroy them. When jumped by a jet, there are a few things you can do such as pulling evasive manoeuvres and wearing the enemy's energy down. Call out for your jet teammates to help you out. When there is one more person running away, unless they are a bomber (which are typically easy to catch) or a prop fighter, will not be much for you to do. Just go to the airfield, repair, and "J"-out. Equip ground target rounds and bombs and try to wear down the tickets. Remember not to die. Survival is more important than ever in the Hei Hayate - your astounding repair cost means that you need to take down at least three air targets before breaking even with this aircraft's repair cost!

• In simulator, the Ki-84 is overall a decent plane to fly. It enjoys lovely visibility towards the rear, sides, above, and over the nose, giving the pilot great situational awareness. It has nice handling, good climb rate, great speed and acceleration. Armament wise, the cannons have destructive damage and enough fire rate to put quite a few projectiles into the target in one pass. However the Ki-84’s disadvantages are the poor rudder efficiency at high speeds, the rather slow roll rate, and the compass at the front-right of the gunsight that can obstruct your view. This aircraft can be used in BnZ fighting, turn fighting, intercepting (to some extent) and some ground pounding.

• Before taking off, bring at least 30 minutes of fuel for longer patrol time. Set the convergence to around 250 m since your weapons have low velocity, therefore needing more precise aim at longer range. While your Ki-84 roars down the runway, you will notice that it shifts severely to the left, thus you must put rudder input to the right to taxi straight. As with other Ki series aircraft, only elevator trim is available, so when the stick is at its deadzone, the Ki-84 will roll and yaw to the left side. Therefore you always need to pull the stick a little to the right which can get a bit annoying. Usually, trim for around -1% when cruising around 470 kph, around -5% when diving around 600 kph, and when fighting at around 400 kph no negative trim is needed. When carrying the 2x 250kg bombload, no negative trim is needed as well. Landing characteristics are forgiving: cut throttle to make sure you are not above 350 kph before touchdown. Deploy combat then takeoff flaps to further decelerate in preparation for extending landing gears. Extend at around 260 kph, control your descend rate throughout. Right before touchdown, deploy landing flaps. The gears are quite sturdy. You can break until the plane reaches full stop and not worry about propeller strike.

Manual Engine Control

MEC elements
Mixer	Pitch	Radiator			Supercharger	Turbocharger
		Oil	Water	Type
Controllable	Not controllable	Not controllable	Not controllable	Separate	Not controllable	Not controllable

Modules

Tier	Flight performance		Survivability	Weaponry
I	Fuselage Repair	Radiator		Offensive 20 mm	9 in (Mod 23)
II		Compressor	Airframe	New 20 mm cannons	12 in (mod 27)
III	Wings Repair	Engine		Offensive 30 mm
IV		Engine Injection	Cover	New 30 mm cannons

Pros and cons

Pros:

• Equipped with a very powerful array of weapons
• Respectable speed for a prop plane
• Decent high altitude performance
• Capable turner
• Solid energy retention
• High muzzle velocity from both cannons
• Insta-kill 30mms

Cons:

• 30 mm cannons are mounted in the wings, resulting in significant convergence
• 30 mm cannons fire fairly slowly, which isn't ideal for dogfighting
• Poor ballistics from the 20 mm cannons at this rank
• Can and will face early jet fighters, which negate your speed advantage
• Useless when the engine's shot
• Airframe is highly susceptible to battle damage, especially of the incendiary type

History

The IJAAF approached Nakajima in 1942 to upgrade it's Ki 43 fighter. They realised the need for a more solidly armoured, faster, and heavier armed fighter. Addressing the common complaints with the Ki 43 which were low speed, lack of armour, and measly armament, the designers at Nakajima unleashed the Ki 84 - Japan's fastest propeller-driven fighter. Using the firm's own Homare, the Ki 84 was easily able to keep up and dogfight with the P-51 and P-47. The Hayate was produced in three modifications which happened to be the same aircraft with different armament options. These three are available to fly in-game.

Media

Skins

• Skins and camouflages for the Ki-84 hei from live.warthunder.com.

Videos

Last piston fighters discusses the Ki-84 hei at 4:09 - War Thunder Official Channel

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

Paste links to sources and external resources, such as:

• topic on the official game forum;
• encyclopedia page on the aircraft;
• other literature.