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.
function of the controls There are four controls in the helicopter that the pilot must use during flight . They are (1) collective pitch control; (2) throttle control; (3) antitorque pedals (auxiliary or tail rotor control); and (4) cyclic pitch control.