SLOTCITY88 RTP SLOT The vertical tail structure has a fixed front section called the vertical stabiliser, used to control yaw, which is movement of the fuselage right to left motion of the nose of the aircraft. The rear section of the vertical fin is the rudder, a movable aerofoil that is used to turn the aircraft's nose right or left. This feature has created a number of running gags, including "I can't do a survey if it's not in the right place, Simon". Structurally, the empennage consists of the entire tail assembly, including the tailfin, the tailplane and the part of the fuselage to which these are attached. Heavier-than-air aircraft without any kind of empennage (such as the Northrop B-2) are rare, and generally use specially shaped airfoils whose trailing edge provide pitch stability, and rearwards swept wings, often with dihedral to provide the necessary yaw stability. All were delivered between 1987 and 1992. Lufthansa also bought Airbus A321, Airbus A340, and Boeing 747-400 aircraft.|Slot X100 For {Beginners|Freshmen|Inexperienced persons|Learners|Newbies|Newcomers|Novices|Rookies} {and everyone|and everybody} Else