Chip detector.  A warning device that alerts you to any  abnormal wear in a transmission or engine. It consists of a  magnetic plug located within the transmission. The magnet attracts any metal particles that have come loose from the  bearings or other transmission parts. Most chip detectors have  warning lights located on the instrument panel that illuminate  when metal particles are picked up. Blade loading.  The load imposed on rotor blades, determined  by dividing the total weight of the helicopter by the combined  area of all the rotor blades. Blade root.  The part of the blade that attaches to the blade  grip. Blade span.  The length of a blade from its tip to its root. Chord.  An imaginary straight line between the leading and  trailing edges of an airfoil section. Blade stall.  The condition of the rotor blade when it is  operating at an angle of attack greater than the maximum  angle of lift. Chordwise axis.  For semirigid rotors, a term used to describe  the flapping or teetering axis of the rotor. Blade tip.  The furthermost part of the blade from the hub  of the rotor. Blade track.  The relationship of the blade tips in the plane  of rotation. Blades that are in track will move through the  same plane of rotation. Coaxial rotor.  A rotor system utilizing two rotors turning  in opposite directions on the same centerline. This system is  used to eliminated the need for a tail rotor. Collective pitch control.  The control for changing the pitch  of all the rotor blades in the main rotor system equally and  simultaneously and, consequently, the amount of lift or thrust  being generated. Blade tracking.  The mechanical procedure used to bring the  blades of the rotor into a satisfactory relationship with each  other under dynamic conditions so that all blades rotate on  a common plane. Coning.  See blade coning. Coriolis effect.  The tendency of a rotor blade to increase or  decrease its velocity in its plane of rotation when the center  of mass moves closer to or farther from the axis of rotation. Blade twist.  The variation in the angle of incidence of a blade  between the root and the tip. Blowback.  The tendency of the rotor disk to tilt aft in  transition to forward flight as a result of unequal airflow. Cyclic feathering.  The mechanical change of the angle of  incidence, or pitch, of individual rotor blades, independent  of other blades in the system. Calibrated airspeed (CAS).  Indicated airspeed of an aircraft,  corrected for installation and instrumentation errors. Cyclic pitch control.  The control for changing the pitch of  each rotor blade individually as it rotates through one cycle  to govern the tilt of the rotor disk and, consequently, the  direction and velocity of horizontal movement. Center of gravity.  The theoretical point where the entire  weight of the helicopter is considered to be concentrated. Center of pressure.  The point where the resultant of all the  aerodynamic forces acting on an airfoil intersects the chord. Centrifugal force.  The apparent force that an object moving  along a circular path exerts on the body constraining the  object and that acts outwardly away from the center of  rotation. Degraded Visual Environment (DVE).  Any flight  environment of reduced visibility in which situational  awareness of the aircrew or control of the aircraft may  be severely diminished, completely lost, or may not be  maintained as comprehensively as they are during flight  operations within clear or undiminished visibility. DVE  conditions are further categorized into eleven different types:  smoke, smog, clouds, rain, fog, snow, whiteout, night, flat  light, sand, and brownout. Centripetal force.  The force that attracts a body toward its  axis of rotation. It is opposite centrifugal force.  G-2