D4Y3 Ko

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RANK 6 USA
"APACHE" | AH-64A Peten
This page is about the Japanese dive bomber D4Y3 Ko. For other uses, see D4Y (Family).
D4Y3 Ko
d4y3.png
GarageImage D4Y3 Ko.jpg
D4Y3 Ko
Research:14 000 Specs-Card-Exp.png
Purchase:55 000 Specs-Card-Lion.png
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Description

The D4Y3 Ko is a rank II Japanese dive bomber with a battle rating of 3.0 (AB/RB/SB). It was introduced in Update 1.71 "New E.R.A".

The D4Y3 is an overall improvement to the D4Y series, it has improved defensive armaments, better bomb loads, and a new radial engine which keeps itself cool. All these advantages give it a 3.0 battle rating, which unfortunately outclasses its armament, rendering it less effective at the fighter role than the D4Y1 and D4Y2.

The D4Y3 in flight

The D4Y3 is still a capable fighter despite these disadvantages, due to its high speed and turn time. It will find Spitfires excellent targets, as you can out turn spitfires and your guns will sooner or later knock out the pilot or rip off a wing, and sometimes damage the tail control. The D4Y3 is also strong in the ground attack role. Its three 250 kg (500 lb) bombs will have no trouble destroying light pillboxes, medium tanks, and bases. The machine guns can also destroy anti-aircraft artillery and light trucks.

D4Y3 in a dive

General info

Flight performance

Arrestor gear
Accelerates braking by grabbing the brake cable on the deck of the aircraft carrier
Air brakes
Allows you to dramatically reduce the flight speed by releasing special flaps
Max speed
at 6 050 m574 km/h
Turn time22 s
Max altitude9 800 m
EngineMitsubishi Kinsei 62
TypeRadial
Cooling systemAir
Take-off weight5 t

The D4Y3 has superior performance to the first two D4Y aircraft, as it has a radial engine, which won't overheat in combat conditions. The radial engine also has a less pronounced radiator, resulting in less drag. The D4Y3 is a capable turner but bleeds energy easily. It is recommended to do hard turns in combat situations.

Characteristics Max Speed
(km/h at 6,050 m)
Max altitude
(meters)
Turn time
(seconds)
Rate of climb
(meters/second)
Take-off run
(meters)
AB RB AB RB AB RB
Stock 541 529 9800 22.8 23.4 5.7 5.7 350
Upgraded 610 574 21.6 22.0 16.5 10.4

Details

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 ~15 ~11
Optimal velocities (km/h)
Ailerons Rudder Elevators Radiator
< 350 < 400 < 430 > 335
Compressor (RB/SB)
Setting 1
Optimal altitude 100% Engine power WEP Engine power
1,000 m 1,280 hp 1,684 hp
Setting 2
Optimal altitude 100% Engine power WEP Engine power
5,000 m 1,185 hp 1,559 hp
D4Y3 cockpit

Survivability and armour

Crew2 people
Speed of destruction
Structural750 km/h
Gear350 km/h

The D4Y3 ditches self-sealing fuel tanks and armour for speed and agility. As such, the D4Y3 should be treated like any other Japanese aircraft, with the utmost caution.

Modifications and economy

Repair costBasic → Reference
AB1 700 → 2 152 Sl icon.png
RB3 620 → 4 582 Sl icon.png
SB4 430 → 5 608 Sl icon.png
Total cost of modifications13 740 Rp icon.png
32 800 Sl icon.png
Talisman cost860 Ge icon.png
Crew training16 000 Sl icon.png
Experts55 000 Sl icon.png
Aces320 Ge icon.png
Research Aces250 000 Rp icon.png
Reward for battleAB / RB / SB
80 / 270 / 300 % Sl icon.png
130 / 130 / 130 % Rp icon.png
Modifications
Flight performance Survivability Weaponry
Mods aerodinamic fuse.png
Fuselage repair
Research:
690 Rp icon.png
Cost:
1 600 Sl icon.png
90 Ge icon.png
Mods radiator.png
Radiator
Research:
690 Rp icon.png
Cost:
1 600 Sl icon.png
90 Ge icon.png
Mods compressor.png
Compressor
Research:
1 000 Rp icon.png
Cost:
2 400 Sl icon.png
140 Ge icon.png
Mods aerodinamic wing.png
Wings repair
Research:
870 Rp icon.png
Cost:
2 100 Sl icon.png
120 Ge icon.png
Mods new engine.png
Engine
Research:
870 Rp icon.png
Cost:
2 100 Sl icon.png
120 Ge icon.png
Mods metanol.png
Engine injection
Research:
1 500 Rp icon.png
Cost:
3 600 Sl icon.png
210 Ge icon.png
Mods armor frame.png
Airframe
Research:
1 000 Rp icon.png
Cost:
2 400 Sl icon.png
140 Ge icon.png
Mods armor cover.png
Cover
Research:
1 500 Rp icon.png
Cost:
3 600 Sl icon.png
210 Ge icon.png
Mods ammo.png
type89_belt_pack
Research:
690 Rp icon.png
Cost:
1 600 Sl icon.png
90 Ge icon.png
Mod arrow 0.png
Mods pilon bomb.png
9 in (mod35)
Research:
690 Rp icon.png
Cost:
1 600 Sl icon.png
90 Ge icon.png
Mod arrow 1.png
Mods weapon.png
type97_new_gun
Research:
1 000 Rp icon.png
Cost:
2 400 Sl icon.png
140 Ge icon.png
Mods ammo.png
type2_turret_belt_pack
Research:
870 Rp icon.png
Cost:
2 100 Sl icon.png
120 Ge icon.png
Mod arrow 0.png
Mods pilon bomb.png
13 in (mod35)
Research:
870 Rp icon.png
Cost:
2 100 Sl icon.png
120 Ge icon.png
Mods turret gun.png
type2_turret_new_gun
Research:
1 500 Rp icon.png
Cost:
3 600 Sl icon.png
210 Ge icon.png

The bomb load-outs should be a priority for this aircraft, and the frontal machine guns should also be a module of importance. The compressor, Engine, and Injection will prove useful. After researching the engine mods, rush the Suitability modules. Only then should you tackle the turrets. The Wings Repair and Fuselage repair should come last.

Armaments

Offensive armament

Ammunition800 rounds
Fire rate900 shots/min
Main article: Type 97 navy (7.7 mm)

The D4Y3 Ko is armed with:

  • 2 x 7.7 mm Type 97 navy machine guns, nose-mounted (400 rpg = 800 total)
D4Y3 in a steep dive

Suspended armament

Number of setups4
List of setups
Setup 12 x 60 kg Navy Type 97 Number 6 ground bomb
1 x 250 kg Navy Type Number 25 Model 2 bomb
Setup 23 x 250 kg Navy Type Number 25 Model 2 bomb
Setup 31 x 500 kg Number Type 2 50 Model 1 GP(SAP) bomb
Setup 42 x 60 kg Navy Type 97 Number 6 ground bomb
1 x 500 kg Number Type 2 50 Model 1 GP(SAP) bomb

The D4Y3 Ko can be outfitted with the following ordnance:

  • Without load
  • 1 x 250 kg Navy Type Number 25 Model 2 bomb + 2 x 60 kg Navy Type 97 Number 6 bombs (370 kg total)
  • 3 x 250 kg Navy Type Number 25 Model 2 bombs (750 kg total)
  • 1 x 500 kg Number Type 2 50 Model 1 GP(SAP) bomb (500 kg total)
  • 1 x 500 kg Number Type 2 50 Model 1 GP(SAP) bomb + 2 x 60 kg Navy Type 97 Number 6 bombs (620 kg total)

Defensive armament

Turret13 mm Type 2 machine gun
Ammunition250 rounds
Fire rate937 shots/min
Main article: Type 2 navy (13 mm)

The D4Y3 Ko is defended by:

  • 1 x 13 mm Type 2 navy machine gun, dorsal turret (250 rpg)
The D4Y3 about to destroy a medium tank

Usage in battles

The D4Y3 is an excellent example of a multirole aircraft, as it is an excellent ground attack aircraft, fighter, and bomber. Since you get a bomber air spawn, 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 as 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 battle rating. Besides the fighter role, the ground attack is the D4Y3's natural method of play. The 500 kg bomb will be excellent for destroying Pillboxes, and you can use your rifle-calibre machine guns to destroy any soft target you please.

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 Controllable
2 gears
Not controllable

The radiator can be kept at 0% in climbs, the D4Y3 will manage to keep cool. Open the oil radiator and radiator to 10% when levelling off, to avoid overheat after prolonged periods of time. Propeller pitch should be kept at 90-100%, and stage two of the supercharger should only be activated at 3,000 meters (10,000 feet).

The D4Y3 as seen from the front. The radial engine produces less drag, thus making it the fastest variant

Pros and cons

The D4Y3's HMG turret, which is very strong at picking off fighters. However, your primary method of defence is your manoeuvrability, not your turret

Pros:

  • D4Y for Carrier-based dive bomber:
    • Great bomb load-outs, can equip three 250 kg bombs, for a total weight of 750 kg
    • Bomber airspawn, outclimbs anything and can intercept
    • Airbrakes
  • Common Navy plane construction:
    • Nose mounted armament
    • Small radiator drag
    • Excellent manoeuvrability, can outrun early Corsairs, Wildcats, and Spitfires
  • D4Y Specific:
    • Fast, can outrun almost anything, save P-38s
      • Its speed forces the enemy to tail behind your gunner, giving you a chance to shoot at the approaching fighter with your turret
  • D4Y3 Ko Specific:
    • Improved defensive armament
    • Improved radial engine which won't overheat, and is an improvement from the D4Y1 and D4Y2

Cons:

  • D4Y for Carrier-based dive bomber:
    • Has bomb cradle, significant delay in fuselage bomb drop
    • Not good for bombing bases
  • Common Navy plane construction:
    • Poor offensive armament: 7.7 mm Type 97 MG
    • Fragile, little armour, and no self-sealing fuel tanks
    • Exposed tail gunner
  • D4Y3 Ko Specific:
    • Has decreased ammo counted compared with the D4Y1
    • Limited ammo count for both 7.7 mm and 13.2 mm armaments

History

Nicknamed the "Judy" by allied pilots, the D4Y3 was feared by both troops on the ground and ships in the sea.

D4Y3 in Frozen Pass

The D4Y3 was converted to be a land based Dive Bomber, while its predecessor the D4Y2 was a carrier based dive bomber. The removal of the tail hook and the addition of the Mitsubishi Kinsei 62 radial engine added 150 horse power while reducing weight. The D4Y3 would see 3 variants, D4Y3 model 33, D4Y3 model 33A, and D4Y3 model 33 night-fighter.

Differences between the Model 33 and the Model 33a was the A variant had the Type 1, 7.92mm rear firing machine gun replaced with an upgraded Type 2, 13mm rear firing machine gun. With the night-fighter variant being equipped with an upwards firing 20mm cannon. Only 3 night-fighters were built as the D4Y2 night fighters were being used with success with fighters already available and assembly lines already making them.

With a range of 1,400 miles the D4Y3 was perfect for the defense of the Japanese territories. Combined with its extreme accuracy in a dive it saw great success especially in the battles at the end of the war. Notably, crippling the USS Kalinin Bay and the USS Suwannee both escort carriers. Eventually they would convert the D4Y3 into a D4Y4, which was exactly the same as the D4Y3 except it carried an un-removable 800kg bomb for kamikaze attacks. Some D4Y4's were equipped with rockets to increase the speed at which the aircrafts would strike their targets increasing the damage they caused.

No D4Y3's survived the war, but a D4Y1 was reconstructed with a Pratt and Whitney R-1830 radial engine to represent a D4Y3. This plane can be seen at the Planes of Fame Air Museum in Chino, California.

Media

See also

  • D4Y1, the first series of the D4Y
  • D4Y2, a D4Y1 with the ability to carry rockets
  • D4Y family

Aircraft of comparable role and era

External links


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.

Japan bombers
Navy 
Carrier-based dive bomber 
D3A  D3A1
D4Y  D4Y1 · D4Y2 · D4Y3 Ko
Carrier-based attack bomber 
B5N  B5N2
B6N  B6N1 Model 11 · B6N2 Model 12 · B6N2a Model 12Ko
B7A  B7A2
Land-based Bomber 
P1Y  P1Y1 mod. 11
Land-based Attack bomber 
G4M  G4M1
G5N  G5N1
G8N  G8N1
Flying boat 
H6K  H6K4
H8K  H8K2 · H8K3
Shipboard Observation seaplane 
F1M  F1M2
Army 
Light  Ki-32
Medium  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