NAVWEPS 00-80T-80  STABILITY AND CONTROL  Chapter  4  STABILITY AND CONTROL  DEFINITIONS  STATIC STABILITY  flight which provide the most critical require-  ments of stability and control and these condi-  tions must be understood and respected to  accomplish safe and efficient operation of the  aircraft.  An aircraft must have satisfactory handling  qualities in addition to adequate performance.  ‘ lYhe aircraft must have adequate stability to  maintain a uniform flight condition and recover  from the various disturbing influences. It is  necessary to provide sufficient stability to  minimize the workload of the pilot.  Also, the  aircraft must have proper response to the  controls so that it may achieve the inherent  performance. There are certain conditions of  An aircraft is in a state of equilibrium when  the sum of all forces and all moments is equal  243 