D4Y1

D4Y1

B6N2a Model 12Ko

D4Y2

D4Y1

B6N2a Model 12Ko

D4Y2

Japan

II Rank

Battle rating:

AB	RB	SB
2.0	2.0	2.3

Class:

Bomber

Dive bomber

Naval aircraft

Research:9 200

Purchase:16 000

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This page is about the Japanese dive bomber D4Y1. For other versions, see D4Y2 and D4Y3 Ko.

Description

The D4Y1 Suisei (Comet), nicknamed Judy by the Americans, is a rank II Japanese bomber with a battle rating of 2.0 (AB/RB) and 2.3 (SB). It was introduced in Update 1.75 "La Résistance". It is a very strong ground attack aircraft, and thanks to its high speed and agility, it can make a great fighter. This is your typical Japanese dive bomber, which has excellent ground pounding capabilities, as well as fighter hunting abilities. All these gifts come with downsides, as the D4Y1 is unable to carry rockets or torpedoes, unlike the D4Y2, and has poor defensive armament compared to the D4Y3. It has an Atsuta Atsuta 21 12-cylinder inline engine, which provides excellent power, but unfortunately has overheating issues.

General info

Flight performance

The D4Y1 going into a dive to destroy a small boat

The D4Y1 is a highly agile and speedy aircraft, it can turn fight anything it wishes, even Spitfires. It gets a bomber airspawn, which allows the D4Y1 to outclimb all the fighters, but be sure to select the right airspawn, because it gets a carrier spawn by default on pacific maps. The only issue with the performance of this aircraft arises at high altitudes, where it is left without a supercharger.

Characteristics	Max Speed (km/h at 4,750 m)		Max altitude (metres)	Turn time (seconds)		Rate of climb (metres/second)		Take-off run (metres)
	AB	RB		AB	RB	AB	RB
Stock	520	509	9800	23.9	24.5	5.6	5.6	300
Upgraded	589	552		22.2	23.0	14.4	9.3

Details

The D4Y1 is useful in Naval Ralistic Battles, as it can destroy many lightly armored boats at this BR with its 500kg bomb

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

Limits
Wings (km/h)	Gear (km/h)	Flaps (km/h)			Max Static G
		Combat	Take-off	Landing	+	-
750	350	480	480	280	~14	~10

Optimal velocities (km/h)
Ailerons	Rudder	Elevators	Radiator
< 350	< 400	< 400	> 200

Compressor (RB/SB)
Setting 1
Optimal altitude	100% Engine power	WEP Engine power
4,500 m	970 hp	1,218 hp

Survivability and armour

The D4Y1 has no armour. Additionally, the fuel tanks are not self-sealing. There are 2 in each wing. The gunner is not covered, making him vulnerable to attacks from the rear.

Armaments

Offensive armament

D4Y1 pulling out of a dive

The D4Y1 is armed with:

• 2 x 7.7 mm Type 97 navy machine guns, nose-mounted (600 rpg = 1,200 total)

Suspended armament

The D4Y1 can be outfitted with the following ordnance:

• Without load
• 1 x 250 kg Navy Type Number 25 Model 2 bomb (250 kg total)
• 1 x 500 kg Number Type 2 50 Model 1 GP(SAP) bomb (500 kg total)

Defensive armament

The D4Y1 is defended by:

• 1 x 7.7 mm Type 92 machine gun, dorsal turret (582 rpg)

Usage in battles

The D4Y1 in Fiji

The D4Y1 is an excellent example of a multirole aircraft, as it is an excellent ground attack aircraft, fighter, and bomber. Since you get a bomber airspawn, you can drop your bomb on a base and then start to engage the many fighters below you. You should have no problems engaging them, as long is you keep your speed up and your energy high. One key thing to note is that you don't need to use your defensive turret to shoo away enemy interceptors. You can easily out turn any interceptor at that BR. Besides the fighter role, ground attack is the D4Y1's natural method of play. The 500kg bomb will be excellent for destroying Pillboxes, and you can use your Rifle Caliber machine guns to destroy any soft target you please.Spec

Specific enemies worth noting

• CW-21 - The CW-21 poses a significant threat to the D4Y1, as it can out-turn, out-climb, and outclass the D4Y1 in every conceivable way. Its armament will shred through the D4Y1, and your plane would be a sitting duck. Now, your gunner can be of some use. Since the CW-21 is a very fragile aircraft, your gunner can set it afire, thus giving you the upper hand. But never under any circumstance attempt to go near this plane, as your gunner is only a last resort.
• He 100 D-1 - Much like the CW-21, this aircraft will outclass you in every way. Your turret will once again come in handy, as it will surely damage its cooling system.

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

Modules

Tier	Flight performance		Survivability	Weaponry
I	Fuselage repair	Radiator		Offensive 7 mm
II		Compressor	Airframe	New 7 mm MGs
III	Wings repair	Engine		Turret 7 mm	13 in (mod35)
IV		Engine injection	Cover	New 7 mm MGs (turret)

The payload option should be a top priority, so getting to tier three modifications is of utmost importance. Rush the new belts and MGs, or the radiator or compressor if you choose to have better performance. Then get the bomb modification. After that, research all engine modifications and then the survivability modifications. Save the turret upgrades for last.

Pros and cons

The D4Y1's defensive gunner, which can help pick seagulls off of your six

Pros:

• Nimble, can out-turn certain enemy fighters
• Fast for its BR, can outrun anything it wishes, save the CW-21 and He 100
• Its speed forces the enemy to tail behind your gunner, giving you a chance to shoot at the approaching fighter with your turret
• Turret covers all upwards angles and covers a decent part of the rear
• Has 400 more rounds in the offensive machine guns than the D4Y2 and D4Y3 Ko, making ammo count less of an issue
• 500 kg bomb will destroy pillboxes, bridges, tanks, and destroyers
• Has Airbrakes
• Armament is nose mounted

The D4Y1 has great turret coverage, it covers a high angle of attack from boom and zoomers.

Cons:

• The Type 92 gun has a low rate of fire and bad accuracy, which can make it hard to aim if an enemy fighter comes your way
• Significant delay in bomb drop
• Exposed gunner
• Not good for bombing bases
• Offensive armament does not provide enough firepower to down bombers, but it can still work wonders on the many fighters you will face, namely the F2A, I-15/16, and Hurricanes
• Fragile, no armour
• Engine overheats easily, it isn't a traditional Japanese radial engine
• No torpedoes

History

D4Y1 in flight

Nicknamed the the "Judy" by allied pilots, the D4Y1 at the beginning of the war was one the fastest planes in all of the Pacific.

The D4Y1 was a carrier based dive bomber, powered by a 1,200 hp "Aichi AE1A Atsuta V12" engine. The D4Y1 was modeled after the German He 118 with the engine being modeled after the DB 601 which was used in the Bf 110. Due to the Japanese Navy requiring an extreme range for the aircraft, it was designed without any armour or self-sealing fuel tanks to lighten the plane so it would use less fuel. The lack of armour and protection decreased the weight, making them extremely quick and nimble but fragile if taking enemy fire. Combined with the unreliable engine, the D4Y1 would see many upgrades in the following models adjusting many of the flaws.

In 1943 with the introduction of the F6F Hellcat, the D4Y's became a sitting duck. Whereas with the F4F Wildcat, the D4Y's could just outrun them, the F6F would catch them with ease. During the "Great Marianas Turkey Shoot" a single F6F pilot Alexander Vraciu would shoot down 6 D4Y's within minutes. 400 Japanese planes would be shot down that day, but a D4Y did land a direct hit on the battleship USS South Dakota.

The D4Y's would become one of the most iconic planes the Japanese Military would use during World War 2.

Only a single complete D4Y1 survives today, located at the "Yasukuni Jinja Yūshūkan shrine" in Tokyo it can be seen completely restored.

Media

Update 1.75 - D4Y1 - TheEuropeanCanadian

See also

• D4Y family
• D4Y2 - An improved D4Y1 with a better engine and rocket payload
• D4Y3 Ko - An improved D4Y2 with an even better engine and a better turret

External links

Paste links to sources and external resources, such as:

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

Yokosuka Naval Air Technical Arsenal (海軍航空技術廠)
Bombers	D4Y1 · D4Y2 · D4Y3 Ko
	P1Y1 mod. 11
Jet fighters	R2Y2 Kai V1 · R2Y2 Kai V2 · R2Y2 Kai V3
Captured	␗P1Y1 mod. 11
	While the arsenal was simply known as the Naval Air Technical Arsenal and usually referred to as Kūgi-shō (Kaigun Kōkū Gijutsu-shō).
	The name Yokosuka prevailed however, even though it referred to the Arsenal's location.
See also	Yokosuka Naval Arsenal (Shipyard)

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