Hello,this is my first attempt to add custom xml stuffs to my models. To make the gear stay parallel to the runway when on ground and during rotation, i add those lines between the codes of the xml new part.(A:SIM ON GROUND, bool) 1 == if{(A:PLANE PITCH DEGREES, degree) 5 * } els{0} and i set up a range of 40

i am not sure. but i think A:plane pitch degree give a negative result. you should multiplie by -5 to get backa positive result for a keyframe setting...tom

I'll try that tonight,Thanks for answering Tom.

Firstly, Tom is right about the pitch: positive pitch will be displayed as a negative number . So: pitch up 5 degrees, will be displayed as -5.Secondly, ALWAYS use a "space" after a { and before a }.Otherwise the if/els opening/closing is not recognised.So:(A:SIM ON GROUND, bool) 1 ==if{ (A:PLANE PITCH DEGREES, degree) 5 * }els{ 0 }Also note (but that's my preference), for boolean variables:"(A:SIM ON GROUND, bool)" is "(A:SIM ON GROUND, bool) 1 =="and"(A:SIM ON GROUND, bool) !" is "(A:SIM ON GROUND, bool) 0 =="Rob Barendregt

You were both right. It works now. Thanks