right turn tendency

[MartinJ]

Hello,

 

I am currently working on my first aircraft for X-Plane - a twin-engine wide body jet. During the test flights I noticed a tendency of the aircraft to turn to the right. First I thought that this behaviour is caused by wrong definitions of the coordinates of the engines, tanks and so on. Since I found no mistake there I changed the turning direction of one engine but without success. Furthermore I checked my flight controls but they are perfectly centered. So I tried some of the default jet aircrafts which come with X-Plane and they also have this strange right turn tendency.

 

My questions:

 

1) What's causing the jet aircraft to turn to the right without control input?

2) How can I solve this issue without adding some constant aileron trim?

 

best regards

Martin

Edited February 15, 2014 by MartinJ

[Alcyon]

1) Uncalibrated joystick or most likely inertial forces.

2) Why? It's a flight simulator in some measure.

[captainamerican]

Could be just the weather in x-plane, the wind pushing your aircraft to the right, also make sure the yaw damper is turned on

[WGP]

Seem there is actually a bug being fixed in 10.30. It was brought up in a comment that this was an issue and the response was that Austin has fixed this for 10.30.

 

 

http://developer.x-plane.com/2014/05/the-what-and-when-of-x-plane-10-30/#comments

 

From the commit log:

planes used to lean off to the right ever so slightly.

it turned out this was due to an error in the computation of flow along the spar direction in cases where wings had dihedral.

some component of this lateral flow took an axial component after sweep was applied, so the right wings were moving slightly slower than they should have been

the effect was a fraction of a knot, but till just enough to lean the plane to the right a hair.

that is now fixed!

 

Edited May 3, 2014 by WGP

[wim1976]

Good news, this is (and hopefully was) one of the frustating things in X-Plane.