ORIGINAL: jeffie8696
If my plane flies tail down at cruise even though it is balanced and trimmed straight would you raise or lower the leading edge wing incidence to correct it?
I would raise the leading edge of the wing to correct it.
That will correct the angle of incidence (angle between the line joining the LE and the TE of the airfoil and the datum line (alongside the fuselage)), and will correct the decalage (difference in angle between the wing's incidence and tail's incidence) to the values originally specified by the designer.
ORIGINAL: jeffie8696
My last trainer did this and it was found the ailerons were adjusted improperly, both were slightly up, this plane has been checked and they are not.
Since the AOA is measured between the airstream and the line joining the LE and the TE of the airfoil, and both ailerons were slightly up (reflexed), the airfoil must pitch up to find the "natural AOA" for that speed (and the rest of the airplane followed the nose up attitude).