Angle of Takeoff

[+Veltro2k 6,315]

What needs tweeking in the Data ini  to lower take off pitch so no tail strike on takeoff ?

[Spinners 15,966]

I can't remember which aircraft I tweaked but I adjusted the CGPosition and got rid of tail strike. Worth a look.

[bazillius 1,252]

it needs to fix Control Surfaces Flaps section ControlRate=0.2 lower nose =0.3 higher nose. for example. not this data. needs to try

[Wrench 9,421]

Quote

[LeftFlapInner]
SystemType=HIGHLIFT_DEVICE
CLiftdc=0.3954
CDdc=0.0216
Cmdc=0.0025
DeltaStallAlpha=-1.89
AreaRatio=1.046
DeploymentMethod=MANUAL
Setting[1].Angle=10.0
Setting[1].DeployValue=113.24
Setting[2].Angle=20.0
Setting[2].DeployValue=113.24
MaxDeflection=30.0
MinDeflection=0.0
ControlRate=0.2
AnimationID=5
ModelNodeName=LIWFlap
ReverseModelOrientation=TRUE

[RightFlapInner]
SystemType=HIGHLIFT_DEVICE
CLiftdc=0.3954
CDdc=0.0216
Cmdc=0.0025
DeltaStallAlpha=-1.89
AreaRatio=1.046
DeploymentMethod=MANUAL
Setting[1].Angle=10.0
Setting[1].DeployValue=113.24
Setting[2].Angle=20.0
Setting[2].DeployValue=113.24
MaxDeflection=30.0
MinDeflection=0.0
ControlRate=0.2
AnimationID=5
ModelNodeName=RIWFlap
ReverseModelOrientation=TRUE

[LeftFlapOuter]
SystemType=HIGHLIFT_DEVICE
CLiftdc=0.3906
CDdc=0.0234
Cmdc=0.0025
DeltaStallAlpha=-1.25
AreaRatio=1.020
DeploymentMethod=MANUAL
Setting[1].Angle=10.0
Setting[1].DeployValue=113.24
Setting[2].Angle=20.0
Setting[2].DeployValue=113.24
MaxDeflection=30.0
MinDeflection=0.0
ControlRate=0.2
AnimationID=5
ModelNodeName=LOWFlap
ReverseModelOrientation=TRUE

[RightFlapOuter]
SystemType=HIGHLIFT_DEVICE
CLiftdc=0.3906
CDdc=0.0234
Cmdc=0.0025
DeltaStallAlpha=-1.25
AreaRatio=1.020
DeploymentMethod=MANUAL
Setting[1].Angle=10.0
Setting[1].DeployValue=113.24
Setting[2].Angle=20.0
Setting[2].DeployValue=113.24
MaxDeflection=30.0
MinDeflection=0.0
ControlRate=0.2
AnimationID=5
ModelNodeName=ROWFLap
ReverseModelOrientation=TRUE

It's already there...

next idea???

[+guuruu 5,580]

1 hour ago, Wrench said:

Cmdc=0.0025

Try set to 0 or increase ... depends on results .

Cm= '+ ' <--- nose up

Cm= ' - ' <--- nose down

For example, this helicopter flap device for vertical take off, additionally downing nose :

[TakeOffLiftDevice]
SystemType=HIGHLIFT_DEVICE
CLiftdc=3.3
CDdc=0.25
Cmdc=-0.085
DeltaStallAlpha=-7
AreaRatio=1.0
DeploymentMethod=MANUAL_WITH_BLOWBACK
Setting[1].Angle=20
Setting[1].DeployValue=1
Setting[1].RetractValue=55
MaxDeflection=20.0
MinDeflection=0.0
ControlRate=0.1

Edited May 23, 2021 by guuruu

[Wilches 1,156]

Add a "skid" entries on tail to avoid any damage.

[Wrench 9,421]

added the skid first, and removed the hit box from the tail section.

just so everyone knows, the statements listed above were taken right from the 3W Hawkeye, upon with the Greyhound is based