A method for classifying audio data. The received signal comprising a set of training sequence bits that have been modulated prior to transmission. This arrangement produces center of mass offset from the central axis of the ring-wing, the pendulum effect will ensure that the aircraft will roll so that its center of mass will always be at the lowest height possible when the aircraft is airborne. An increased degree of safety and convenience is realized from use of the devices herein set forth. higher than the toner fixing temperature and has a specified activation energy of 15 to 85 KJmol.