H6K4

H6K4

Ki-21-Ia

H6K4

Ki-21-Ia

Japan

I Rank

Battle rating:

AB	RB	SB
2.0	1.7	2.3

Class:

Bomber

Hydroplane

Torpedo bomber

Research:5 900

Purchase:6 300

Show in game

Description

The H6K4 is a rank I Japanese flying boat/heavy bomber with a battle rating of 2.0 (AB), 1.7 (RB), and 2.3 (SB). It has been in the game since the start of the Open Beta Test prior to Update 1.27.

General info

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.

Characteristics
Stock
Max Speed (km/h at 4,100 m)		Max altitude (meters)	Turn time (seconds)		Rate of climb (meters/second)		Take-off run (meters)
AB	RB		AB	RB	AB	RB
311	303	9560	23.3	24.0	5.3	5.3	396
Upgraded
Max Speed (km/h at 4,100 m)		Max altitude (meters)	Turn time (seconds)		Rate of climb (meters/second)		Take-off run (meters)
AB	RB		AB	RB	AB	RB
???	???	9560	??.?	??.?	??.?	??.?	396

Details

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

Limits
Wing-break speed (km/h)	Gear limit (km/h)	Combat flaps (km/h)	Max Static G
			+	-
		520	~3	~2

Optimal velocities
Ailerons (km/h)	Rudder (km/h)	Elevators (km/h)	Radiator (km/h)
< 240	< 240	< 240	> 341

Compressor (RB/SB)
Setting 1
Optimal altitude	100% Engine power	WEP Engine power
1,500 m	1,050 hp	1,123 hp

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.

Armaments

Suspended armament

The H6K4 can be outfitted with the following ordnance:

• 12 x 60 kg Navy Type 97 Number 6 bombs (720 kg total)
• 2 x 250 kg Navy Type Number 25 Model 2 bombs (500 kg total)
• 2 x 250 kg Navy Type 98 Number 25 bombs (500 kg total)
• 2 x 500 kg Navy Type Number 50 Model 2 bombs (1,000 kg total)
• 2 x 800 kg Navy Type Number 80 Model 1 bombs (1,600 kg total)
• 2 x 800 kg Navy Type 99 Number 80 AP bombs (1,600 kg total)
• 2 x Type 91 Mod.2 torpedoes
• 2 x Type 91 Mod.3 torpedoes

Defensive armament

The H6K4 is defended by:

• 1 x 20 mm Type 99 Model 1 navy cannon, tail turret (432 rpg)
• 1 x 7.7 mm Type 92 navy machine gun, nose turret (582 rpg)
• 1 x 7.7 mm Type 92 navy machine gun, 2 x beam turrets (582 rpg)
• 1 x 7.7 mm Type 92 navy machine gun, dorsal turret (582 rpg)

Usage in 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 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).

Manual Engine Control

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

Modules

Tier	Flight performance		Survivability	Weaponry
I	Fuselage repair	Radiator		Turret 7 mm	12 in (mod30)
II		Compressor	Airframe	New 7 mm MGs (turret)	17 3/4 in (mod45)
III	Wings repair	Engine		Turret 20 mm	Improved torpedo
IV		Engine injection	Cover	New 20 mm cannons (turret)	14 in (mod35)

Pros and cons

Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".

Pros:

Cons:

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: https://wiki.warthunder.com/(Vehicle-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under === In-game description ===, also if applicable).

In-game description

A quad-engined all-metal parasol-wing monoplane flying boat. An experimental version, the Type S, made its first flight on July 14, 1936. The plane was approved by the Imperial Japanese Navy as Type 97 Large Flying Boat in 1937. Mass production began in 1938.

The most common variant was model 22 (H6K4), created in 1940. The first 119 planes were fitted with a air-cooled 14-cylinder twin-row radial Mitsubishi Kinsei 43 engine (1000 hp). Afterwards, the slightly more powerful Kinsei 46 was used. The H6K4 carried more fuel than earlier models, increasing its maximum range to 25 hours, or 6000 kilometers. Its fuselage included waist blisters fitted with machine guns, which required a slightly longer tail section.

The H6K4 was armed with four 7.7mm Type 97 (Lewis) machine guns with 582 rounds apiece and, in the tail turret, one 20mm Type 99-I cannon with 432 rounds. The flying boat could carry twelve 60-kg bombs, four 250-kg bombs, or two 800-kg Type 91 Model 1 torpedoes.

A major weakness of all H6K flying boats was the lack of protective armor for the crew and for the fuel tanks. This was sacrificed for the sake of its extended flight range. When the plane started to suffer losses in combat, designers of later Model 22 planes began to focus on protecting the crew.

The H6K flying boat's first combat action was a raid on Wake Island on December 11, 1941. The plane was widely used in the Pacific theater during the first part of the war. The H6K ran long-range reconnaissance missions, convoy escort duty, submarine searches, bombing missions, and search and rescue operations. When the newer H8K arrived, the H6K began to be used mostly as a transport plane. The plane was in operation until the Japanese surrender in 1945.

127 H6K4s were built, out of a total of 217 H6Ks.

Media

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

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.

Kawanishi Aircraft Company (川西航空機)
Fighters	J6K1
N1K	N1K1-Ja · N1K2-J · N1K2-Ja
Bombers	H6K4 · H8K2 · H8K3
Hydroplane	N1K1 · E7K2

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