When I use the alt-hold function for the FSX CJ1 at cruise level, the trim wheel oscillates up and down and the plane porpoises. Does anyone know any setting for this aircraft that will stabilize the trim wheel (in the virtual panel) so that the plane does not porpoise constantly? Thanks. Bob

The autopilot is constantly making micro adjustments to the trim. If you are inducing a phugoid oscillation, you're flying too fast...