To realize stability and Regulate, most fixed-wing kinds have an empennage comprising a fin and rudder which act horizontally as well as a tailplane and elevator which act vertically.???? ????? ???? ??????? ?? ??????? ???? ???? ??? ???? ?? ???? ?? ???????? ???? ??????? ??????.??????? ?????? ??? ???????????? ???? ???????? ?? ?? ?? ??????? ?????????