A6M5a Aerodynamics Data

[Ambaryerno]

I'm trying to find aerodynamics data on the A6M5a Zero to try and correct some flight modeling for a DCS mod. Currently, the mod's flight modeling is...suspect. I'm specifically trying to find this data to fill out the SFM table:

-- Cx0 - Coefficient, drag, profile, of the airplane
-- Cya - Normal force coefficient of the wing and body of the aircraft in the normal direction to that of flight. Inversely proportional to the available G-loading at any Mach value. (lower the Cya value, higher G available) per 1 degree AOA
-- B - Polar quad coeff
-- B4 - Polar 4th power coeff
-- Aldop - Alfadop Max AOA at current M - departure threshold
-- Cymax - Coefficient, lift, maximum possible (ignores other calculations if current Cy > Cymax)

I've already corrected the roll rate, but I want to check this other information as well, at least as best as possible, across a range of speeds to try getting this mod dialed in.

 

[Ambaryerno]

Still looking for some help if possible. Also, does anyone know why on this chart:

The roll rate for the Zero stops at 330mph IAS? At the 10,000ft test altitude this comes to about 398mph TAS.

Did they just not test above that speed? Or was it because the aircraft couldn't be rolled at that point?

 

[taly01]

A6M5/a Zero permitted dive speed is round 360-400kt so i'm surprised the chart data went that high.

This is my full A6M5a il21946 file. I have not radically changed it from original but Cx0 etc was redone. But it gets performance close (P.S. need to add ~30 sec to climb as I air start at ~100m)

A6M5-52a

A6M5A

21

3:09/3000m

6:36/6000m

523-.../3300m

541-553/6000m

[Aircraft]
Type 1
Crew 1
Wingspan 11.00
Length 9.12
Seaplane 0
Canard 0
Jet 0
JetHiV 0
[Mass]
Empty 2004.0
TakeOff 2743.7
Oil 30.0
Fuel 434.0
[Controls]
CAileron 1
CAileronTrim 0
CElevator 1
CElevatorTrim 1
CRudder 1
CRudderTrim 1
CFlap 1
CFlapPos 3
CDiveBrake 0
CInterceptor 0
CEngine 1
CVectoredThrust 0
CUndercarriage 1
CLockTailwheel 1
CStabilizer 0
CArrestorHook 1
CWingFold 0
CCockpitDoor 1
CDifferentialBrakes 1
CockpitDoorPeriod 1.5
CAileronThreshold 280.0
CRudderThreshold 320.0
CElevatorThreshold 360.0
DefaultAileronTrim 0.008
DefaultElevatorTrim -0.09
DefaultRudderTrim 0.065
[Squares]
Wing 21.30
Aileron 1.5
Flap 1.61
Stabilizer 1.90
Elevator 1.10
Keel 0.90
Rudder 1.10
Wing_In 3.0
Wing_Mid 4.0
Wing_Out 3.65
AirbrakeCxS 0.0
[Arm]
Aileron 3.84
Flap 1.70
Stabilizer 5.10
Keel 5.40
Elevator 5.48
Rudder 5.72
Wing_In 1.0
Wing_Mid 2.28
Wing_Out 3.98
Wing_V 1.5
GCenter 0.05
GCenterZ 0.00
GC_AOA_Shift 0.40
GC_Flaps_Shift 0.15
GC_Gear_Shift 0.05
[Toughness]
AroneL 40
AroneR 40
CF 300
Engine1 200
Engine2 200
Engine3 200
Engine4 200
GearL2 300
GearR2 300
Keel1 50
Keel2 50
Nose 50
Oil 50
Rudder1 50
Rudder2 50
StabL 50
StabR 50
Tail1 100
Tail2 100
Turret1B 100
Turret2B 100
Turret3B 100
Turret4B 100
Turret5B 100
Turret6B 100
VatorL 40
VatorR 40
WingLIn 100
WingLMid 75
WingLOut 60
WingRIn 100
WingRMid 75
WingROut 60
Flap01 50
Flap02 50
Flap03 50
Flap04 50
[Engine]
Engine0Family Nakajima
Engine0SubModel Sakae-21
[Gear]
H 1.593106
Pitch 12.089
SinkFactor 700.0
SpringsStiffness 0.8
TailStiffness 0.3
[Params]
CriticalAOA 20.00
CriticalCy 01.80
CxCurvature 00.80
CxStraightness 00.20
CriticalAOAFlap 22.00
CriticalCyFlap 02.10
SpinTailAlpha 17.00
SpinCxLoss 0.06
SpinCyLoss 0.02
Vyfac 0.90
Tfac 1.02
Vmin 150.0
Vmax 462.0
VmaxAllowed 741.0
VmaxH 555.0
HofVmax 6000.0
VminFLAPS 125.0
VmaxFLAPS 250.0
Vz_climb 18.0
V_climb 220.0
T_turn 15.0
V_turn 290.0
K_max 14.0
Cy0_max 0.15
FlapsMult 1.0
FlapsAngSh 12.0
G_class_coeff 20.0
G_class 12.6
ReferenceWeight 120.00
Range 1400.0
CruiseSpeed 340.0
SensYaw 0.44
SensPitch 0.66
SensRoll 0.37
[Polares]
lineCyCoeff 0.085
AOAMinCx_Shift 0.0
Cy0_0 0.14
AOACritH_0 17.0
AOACritL_0 -15.0
CyCritH_0 1.2058289
CyCritL_0 -0.81926084
CxMin_0 0.0230
parabCxCoeff_0 5.0E-4
Cy0_1 0.6668992
AOACritH_1 14.0
AOACritL_1 -20.0
CyCritH_1 1.5688039
CyCritL_1 -0.8
CxMin_1 0.08129228
parabCxCoeff_1 6.0E-4
parabAngle 4.0
Decline 0.006
maxDistAng 40.0
draw_graphs 0
mc3 -18.481,-14.486,-9.8192,-40.103,-34.626,-12.596,31.23,37.426
mc4 41.96,41.96,34.677,413.29,310.51,175.28,-119.72,-159.34
mm 0.646,0.693,0.777,0.764,0.759,0.716,0.673,0.639
mz 0.25,0.224,0.213,0.088,0.088,0.085,0.089,0.105
[SOUND]
Engine fw_190

END.

 

[mad_max]

Maybe these can help you find what you need. I've collect data/stuff for 30+ years helping different Aircraft Simulations starting with Air Warrior and continuing on to even today with iEnt Warbirds Sim. A new version is planned to be released at the end of August. Hopefully these will help you. Enjoy!

A6M – Google Drive

drive.google.com

View: https://drive.google.com/file/d/1BhwEJieEHoIz8f-5gNYHLaxCaBTnJmMF/view?usp=sharing


View: https://drive.google.com/file/d/12FiHFZABX5bgOcVPV0-fq1WVlFSnMms1/view?usp=sharing

 

[Jaivan]

Check Phillips' NACA Memorandum Report Sept. 1943 Measurements of characteristics of japanese Zero-2 airplane in simulated combat maneuvers and NACA Memorandum Report for BuAer May 5, 1943 Preliminary measurements of flying qualities of the Japanese Mitsubishi 00 pursuit airplane (US Navy designation Zero-2)