To have a notion of the temporal system evolution along the predicted reaction paths, in observed. After the relaxation, this effect becomes even more pronounced, which can be ascribed to increasing kinetic energy accumulated in the system. At the same time, the span of dihedral angles visited by the switching unit in the course of the dynamics never comes near a point at which its orientation could be flipped, which would result in the instability of system's chirality. Eventually, we conclude on promising PFCN properties for application as an electric-field switchable molecular rotary motor.