What I have noticed is that if following an enemy aircraft and it is doing hard maneuvering at some point it will level out or fly straight for a time. What I am starting to adapt to is that if when on the tail of an enemy aircraft and I start to gray out I will back off, assuming that is also happening to my foe. I wait until I have full control and try to re engage, some times I find that my foe is flying level and not very aware of my presence making for an easy shot at shooting him down.