NAVWEPS OO-80T-80  STABILITY AND CONTROL  HELIX ANGLE OF ROLL  IP VELOCITY,$  RCUING VELOCITY, P  TIP VELOCITY WE TO ROLL  RESULTANT PATH  ( RADIANS 1  DAMPING IN ROLL  STARBOARD  WING  AIRPLANE RESPONSE TO AILERON DEFLECTION  PIRPLANE RESTRAINED  TO ROLLING MOTION ONLY  ------(A)  HIGH DlRECTlCNAL STABILITY  m  DIHEDRAL EFFECT  AIRPLANE UNRESTRAINED  \  AND FREE TO SIDESLIP  \  (RUDDER FIXED)  ( B ) LOW DIRECTIONAL STABIUTY  .---A  HIGH MHEDRAL EFFECT  w  TIME, SECONDS  Figure 4.29. Rolling Performance  302 