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Posted

What can cause this. it's like it needs its wheels balanced :lmao:

but seriously, when I apply power the airplane starts veering to the side of the runway..how can this be fixed ?

Posted

Check rolling radius and friction, also check drag values.

 

Additionally, if it's a multi-engine aircraft, check the thrust position/angles.

 

Dels

Posted

Check rolling radius and friction, also check drag values.

 

Additionally, if it's a multi-engine aircraft, check the thrust position/angles.

 

Dels

[Engine1]

SystemType=JET_ENGINE

InputName=THROTTLE_CONTROL

EngineID=1

HasAfterburner=TRUE

NumAfterburnerStages=4

SLThrustDry=86300.0

SLThrustWet=110000.0

ThrustAngles=0.0,0.00,0.0

ThrustPosition=-0.893,-9.491,0.193

ThrottleRate=0.5

NozzleAnimationID=

IdleThrottle=0.10

IdleRPM=0.68

IdleNozzle=0.0

CruiseThrottle=0.37

CruiseRPM=0.82

CruiseNozzle=1.0

MilThrottle=0.65

MilRPM=1.00

MilNozzle=1.0

MaxThrottle=0.78

MaxRPM=1.00

MaxNozzle=1.0

FullABThrottle=1.12

FullABRPM=1.00

FullABNozzle=0.0

AltitudeTableNumData=10

AltitudeTableDeltaX=3048.0

AltitudeTableStartX=0.0

AltitudeTableData=1.000,0.802,0.634,0.546,0.471,0.378,0.296,0.197,0.105,0.000

DryMachTableNumData=4

DryMachTableDeltaX=0.4

DryMachTableStartX=0.0

DryMachTableData=1.000,0.980,1.172,0.000

WetMachTableNumData=7

WetMachTableDeltaX=0.4

WetMachTableStartX=0.0

WetMachTableData=1.000,0.991,1.207,1.683,2.473,2.750,3.027

MaxInletTemperature=120

GyroscopicInertia=

TSFCM0=0.880

TSFCM1=1.290

AfterburnerTSFC=1.930

MinFuelFlow=0.02

AfterburnerEffectSize=1.36

ExhaustEmitterName=DirtyExhaustEmitter

ExhaustPosition=-0.893,-9.491,0.193

AfterburnerNodeName=afterburnerfire2

AfterburnerEmitterName=AfterburnerEmitter

MinExtentPosition=-1.13,-3.68,-1.02

MaxExtentPosition=-0.14, 1.36,-0.04

FireSuppression=TRUE

GasTempMaxRPM=635.0

GasTempIdleRPM=420.0

GasTempChangeRate=5.0

OverheatTemp=750.0

DamageTempDelta=300.0

OilPressMaxRPM=35.0

OilPressIdleRPM=55.0

OilPressChangeRate=0.5

LowOilPress=12.0

LowOilTempDelta=400.0

 

[Engine2]

SystemType=JET_ENGINE

InputName=THROTTLE_CONTROL

EngineID=2

HasAfterburner=TRUE

NumAfterburnerStages=4

SLThrustDry=86300.0

SLThrustWet=110000.0

ThrustAngles=0.0,0.00,0.0

ThrustPosition=0.893,-9.491,0.193

ThrottleRate=0.5

NozzleAnimationID=

IdleThrottle=0.10

IdleRPM=0.68

IdleNozzle=0.0

CruiseThrottle=0.37

CruiseRPM=0.82

CruiseNozzle=1.0

MilThrottle=0.65

MilRPM=1.00

MilNozzle=1.0

MaxThrottle=0.78

MaxRPM=1.00

MaxNozzle=1.0

FullABThrottle=1.12

FullABRPM=1.00

FullABNozzle=0.0

AltitudeTableNumData=10

AltitudeTableDeltaX=3048.0

AltitudeTableStartX=0.0

AltitudeTableData=1.000,0.802,0.634,0.546,0.471,0.378,0.296,0.197,0.105,0.000

DryMachTableNumData=4

DryMachTableDeltaX=0.4

DryMachTableStartX=0.0

DryMachTableData=1.000,0.980,1.172,0.000

WetMachTableNumData=7

WetMachTableDeltaX=0.4

WetMachTableStartX=0.0

WetMachTableData=1.000,0.991,1.207,1.683,2.473,2.750,3.027

MaxInletTemperature=120

GyroscopicInertia=

TSFCM0=0.880

TSFCM1=1.290

AfterburnerTSFC=1.930

MinFuelFlow=0.02

AfterburnerEffectSize=1.36

ExhaustEmitterName=DirtyExhaustEmitter

ExhaustPosition=0.893,-9.491,0.193

AfterburnerNodeName=afterburnerfire2

AfterburnerEmitterName=AfterburnerEmitter

MinExtentPosition= 1.13,-3.68,-1.02

MaxExtentPosition= 0.14, 1.36,-0.04

FireSuppression=TRUE

GasTempMaxRPM=635.0

GasTempIdleRPM=420.0

GasTempChangeRate=5.0

OverheatTemp=750.0

DamageTempDelta=300.0

OilPressMaxRPM=35.0

OilPressIdleRPM=55.0

OilPressChangeRate=0.5

LowOilPress=12.0

LowOilTempDelta=400.0

 

[NoseGear]

SystemType=LANDING_GEAR

Retractable=TRUE

DeployTime=5.0

AnimationID=1

DragArea=0.25

HideGearNode=FALSE

ModelNodeName=Gear_F

ShockNodeName=Strutn

ShockTravelAxis=Z-Axis

InsideNodeName=

ShockAnimationID=

ShockStroke=0.20

SpringFactor=2.0

DampingFactor=1.0

WheelNodeName=Tire_FR

WheelNodeName=Tire_FL

RotationAxis=X-Axis

RollingRadius=0.40

CastoringWheel=TRUE

CastoringNodeName=Faxe

Steerable=TRUE

MaxSteeringSpeed=41.15

Locking=FALSE

MaxSteeringAngle=45.0

InputName=YAW_CONTROL

ControlRate=1.0

HasBrakes=FALSE

RollingCoefficient=0.05

MaxDeploySpeed=160.00

MaxLoadFactor=5.0

 

[LeftMainGear]

SystemType=LANDING_GEAR

Retractable=TRUE

DeployTime=5.0

AnimationID=1

DragArea=0.50

HideGearNode=TRUE

ModelNodeName=Gear_L

ShockNodeName=

ShockTravelAxis=Y-Axis

ShockStroke=0.20

SpringFactor=4.0

DampingFactor=2.0

WheelNodeName001=TIRELF

WheelNodeName001=TIRELR

RotationAxis=X-Axis

RollingRadius=0.50

CastoringWheel=FALSE

HasBrakes=TRUE

BrakingCoefficient=0.75

RollingCoefficient=0.05

MaxDeploySpeed=160.00

MaxLoadFactor=6.0

 

[RightMainGear]

SystemType=LANDING_GEAR

Retractable=TRUE

DeployTime=5.0

AnimationID=1

DragArea=0.50

HideGearNode=TRUE

ModelNodeName=Gear_R

ShockNodeName=

ShockTravelAxis=Y-Axis

ShockStroke=0.20

SpringFactor=4.0

DampingFactor=2.0

WheelNodeName001=TIRERF

WheelNodeName001=TIRERR

RotationAxis=X-Axis

RollingRadius=0.50

CastoringWheel=FALSE

HasBrakes=TRUE

BrakingCoefficient=0.75

RollingCoefficient=0.05

MaxDeploySpeed=160.00

MaxLoadFactor=6.0

Posted

Well none of the obvious culprits are visible.

 

Can you try rolling down the runway at various power settings to assess when the yaw starts to kick in and/or the severity at various speeds/power settings.

 

If it's move evident at faster speeds then it could be a drag value of an aircraft component. In line with this, does the aircraft fly in balance (i.e. skid ball central)?

 

Dels

Posted

Ed, try to look in your 3D file and see if for exhample the left wing have a simmetrical pivot point with the right one. There are some aircrafts that have this issues with pylons. When you load weapons on them they have all the weigh on a side because the pylons have the pivot in wrong position.

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