This is caused by non-zero vertical stabilizer incidence angle.
<[aerowing][VertStabilizerAero][]
<[string8][Body][Fuselage]>
<[string8][Flap0Control][ServoRudder.Output]>
<[float64array][StationY] [ 0.0 0.0 ]>
<[float64array][StationLE] [ -4.42690 -3.31020 ]>
<[float64array][StationTE] [ -5.24986 -4.89516 ]>
<[float64array][StationZ] [ 1.54146 0.0 ]>
<[float64array][StationIncidence] [ 0.03491 0.01745 ]> // ???? constant side slip WTF? FOOBAR - SHOULD BE ZERO
<[uint32array][StationFlap] [ 1 0 ]>
<[float64array][StationFlapFraction][ 0.28 0.00 ]>
<[float64][AspectRatioMultiplier][1.0]>
<[string8][AirfoilRoot][AirfoilVerticalStabilizer]>
<[string8][AirfoilTip][AirfoilVerticalStabilizer]>
<[float64][GroundEffectFactor][1.0]>
<[float64][GroundEffectScale][1.0]>
IF the intent was to have propwash effects, then the correct implementation would be to define the PropWash parameters in the aerowing objects of the wings, horizontal stabs, and vertical stabilizer.
Constant Sideslip with rudder centered as shown
This is caused by non-zero vertical stabilizer incidence angle. <[aerowing][VertStabilizerAero][] <[string8][Body][Fuselage]> <[string8][Flap0Control][ServoRudder.Output]> <[float64array][StationY] [ 0.0 0.0 ]> <[float64array][StationLE] [ -4.42690 -3.31020 ]> <[float64array][StationTE] [ -5.24986 -4.89516 ]> <[float64array][StationZ] [ 1.54146 0.0 ]> <[float64array][StationIncidence] [ 0.03491 0.01745 ]> // ???? constant side slip WTF? FOOBAR - SHOULD BE ZERO <[uint32array][StationFlap] [ 1 0 ]> <[float64array][StationFlapFraction][ 0.28 0.00 ]> <[float64][AspectRatioMultiplier][1.0]> <[string8][AirfoilRoot][AirfoilVerticalStabilizer]> <[string8][AirfoilTip][AirfoilVerticalStabilizer]> <[float64][GroundEffectFactor][1.0]> <[float64][GroundEffectScale][1.0]>
IF the intent was to have propwash effects, then the correct implementation would be to define the PropWash parameters in the aerowing objects of the wings, horizontal stabs, and vertical stabilizer.