7/17/2019 D4Y2 Judy ADC

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AIRCRAFT PERFORMANCE CHART

  Altitude Minimum Maximum Maximum Min. Min. Min. Min. Altitude AverageLevels Band Speed Speed Dive Spd. TT (2) HT (3) BT (4) ET (5) Band Levels Rate Of Climb

43+ UH ––– ––– ––– –– –– –– –– UH 43+ ––––

37 - 42 EH ––– ––– ––– –– –– –– –– EH 37 - 42 ––––

31 - 36 VH 3.0 6.5 10.5 5.0 6.0 7.5 8.5 VH 31 - 36 600

25 - 30 HI 2.5 7.0 11.0 4.0 5.5 6.5 7.5 HI 25 - 30 1,300

19 - 24 MH 2.5 7.0 11.0 3.5 5.0 6.0 7.0 MH 19 - 24 2,100

13 - 18 ML 2.5 7.0 10.5 3.0 4.5 5.5 6.0 ML 13 - 18 2,600

  7 - 12 LO 2.0 6.5 10.0 3.0 4.0 5.0 5.5 LO 7 - 12 2,700

1 - 6 VL 2.0 6.5 9.0 2.5 3.5 4.5 5.0 VL 1 - 6 2,800

Yokosuka D4Y2 “Judy”

 A/C Type: Type 2 Model 12 Naval Dive Bomber 

Engine(s): One Aichi AEIP Atsuta 31

Eng. Pwr: 1250 - 1440 HP, Liquid Cooled

 A/C Crew: Pilot, radioman-gunner 

Max Speed: 377 MPH at 19,700 Feet

Max Ceiling: 35,100 / 27,000 / 18,100 Feet

Defense Factor: 5 Size Modifier: +0Damage Factor: 8 / 12 Endurance: 385

Cockpit View: Fair Blind Area: 6:00 line low

Protection: Cockpit +0 Fuel –1 Engine +0

Climb Decel / Dive Accel: 3.0 / 1.0

Weight and Load Limit: 2,400 / 3 - 8

Wpn. Stations Weight Allowed Loads

1, 3 600 Bomb, Fuel Tank

2 (Bay) 1,200 Bombs

FIRE POWER CHART

Guns Type Weapons Ammo CriticalsN1 One 7.7mm Type 97 16 4

N2 One 7.7mm Type 97 16 4

DG One 7.9mm Type 1 (6x3)* 4

(DGa) One 13mm Type 2 8 3

* See Chapter 10 for gun reloading rules

GUN ATTACK FACTORS

Range N1 N2 Total DG (DGa)

0 5 5 10 4 7

1 4 4 8 3 5

2 3 3 6 2 4

3 2 2 4 1 2

4 1 1 2 1 15 1 1 2 1 1

6 –– –– –– –– 1

7 –– –– –– –– ––

WEAPON STATIONS

POWER VERSUS SPEED CHART

Levels Band 1.0 - 4.5 5.0 - 7.5 8.0 - 9.5 10.0 + Band43+ UH ––– ––– ––– ––– UH

37 - 42 EH ––– ––– ––– ––– EH

31 - 36 VH 1 / 2 0.5 / 1 ––– ––– VH

25 - 30 HI 3 / 4 1 / 2 ––– ––– HI

19 - 24 MH 5 / 6 2 / 3 ––– ––– MH

13 - 18 ML 7 / 8 4 / 5 ––– ––– ML

  7 - 12 LO 7 / 8 4 / 5 ––– ––– LO

1 - 6 VL 7 / 8 4 / 5 ––– ––– VL

Banking FPs: 2 3 6 8

Side Slip FPs: 3 5 7 9

NOTES & VARIANTS

D4Y2 model 12: Named "Suisei" by Japa-

nese. Dive brakes. Ring & bead backup

sight. D4Y2-C = recon model as for 1-C.

D4Y2a model 12A:  Variant with 13mm

dorsal gun (D10 ≤ 4 anytime in 1945).

D4Y1 model 11: Initial March 1943 dive

bomber version with 1,200 HP Atsuta 12

engine. Reduce all max level speeds by

0.5, reduce all ROC nos. by 200 and all

power nos. by 1 (but not to < 0.5). Stations

! and 3 for bombs only. Max endurance =

420. Ceilings = 32,500 / 25,000 / 16,800.

 All else as for D4Y2.

  Country: Japan Service Entry Date: October 1944

1 2 (Bay) 3

  Class: LD Victory Points: 5 - 10

DEFENSIVE GUN COVERAGE

DG: Rear +30, high to low,

except 6:00 line = high+.*

Fuel: Max endurance = 385. If end.

remaining is ≤ 240 Fuel prot. = +0.

Loads: Bay = one bomb of up to 1,100

lbs. or two of up to 250 lbs. Stations 1

& 3 may each carry one 66 lb. bomb or 

a drop tank of up to 600 lbs.

D4Y1-C:  Initial August 1942 recon

version having cameras in bay and

drop tank capability. Not equipped for 

dropping bombs. No dive brakes. All

else as for D4Y1 model 11.

 JDW Jan06