A freestanding portable partition panel system is provided for open office spaces and the like. Said operations of said control device are defined according to a predetermined damping force relationship that is a function of an instantaneous load factor of the hybrid helicopter in such a manner that the instantaneous load factor is maintained between its minimum and maximum limit values in proportion to a position of a thrust control member between its minimum and maximum thrust values. In a data phase period, the switch portions SW1H and SW1L are turned ON, and the switch portions SW2H, SW2L, SW3H, and SW3L are turned OFF. In yet another exemplary embodiment of the present invention, a multi-layer power amplifier is provided that comprises two or more chassis and circuits attached to impedance matching interfaces according to the present invention. The first transceiver receives a first signal from the base station intended for a one of the mobile stations, and in response the second transceiver transmits the first signal to the mobile station. A mount is affixed to a rear of the resilient body for attaching the training aid to an external support.