some aircraft have stability augmentation systems that will stabilize the aircraft in more than a single axis. the boeing b-52, for example, requires both pitch and yaw sas in order to provide a stable bombing platform. many helicopters have pitch, roll and yaw sas systems. pitch and roll sas systems operate much the same way as the yaw damper described above; however, instead of dampening out dutch roll, they will dampen pitch and roll oscillations or buffeting to improve the overall stability of the aircraft.