Rudder of a commerical aircraft

A rudder of a commercial aircraft, comprising:

• a division along a longitudinal direction of the rudder in at least one region;
• a plurality of parts of the rudder spread against an air flow surrounding the commercial aircraft by means of an actuator for decelerating the commercial aircraft;
• a joint base that is supported articulatedly on the commercial aircraft and is turnable by means of the actuator for lateral control of the commercial aircraft;
• a first part of the rudder supported in an articulated fashion relative to the joint base and spreadable against the air flow surrounding the commercial aircraft by means of the actuator in order to decelerate the commercial aircraft;
• and
• a second part of the rudder rigidly connected to the joint base,
• wherein the first part of the rudder supported in an articulated fashion is turned relative to the joint base by means of the actuator for spreading the rudder and the second part of the rudder that is rigidly connected to the joint base is pivoted toward an opposite side together with the joint base by means of the actuator for the lateral control of the commercial aircraft in order to realize a symmetric excursion of the first part and second part during the spreading of the rudder.