Definition of waiver. 1  1 : the act of intentionally relinquishing or abandoning a known right, claim, or privilege; also : the legal instrument evidencing such an act.
Roll, pitch and yaw. Roll, pitch and yaw are rotations along the natural axes of the helicopter (or any aircraft). A rolling movement is where the helicopter rotates along a line along its length using lateral cyclic inputs (aileron), eventually turning from right way up to inverted while maintaining the helicopter's heading.
The vertical stabilizer keeps the nose of plane from swinging side to side, which is called yaw. Aircraft such as the b 2 manage to provide stability through computer aircraft is tendency of an airplane return straight and level flight when it disturbed.