Coning is an upward sweeping angle of the rotor blades as a result of lift and centrifugal force.
The Coriolis effect is when the rotor blades speed up or slow down as the center of gravity moves closer or further away from the axis of rotation.
Lead-lag or leading and lagging is the horizontal movement of the rotor blades forwards and backwards along a vertical hinge.
Cyclic feathering is the term used to describe the changing of the blade angle separately for individual blades through pilot input via the cyclic.
Due to gyroscopic precession, changes to the rotor system are felt 90 degrees to the right or in the direction of the rotation.
The center of pressure is the point along the chord line of an airfoil where of all aerodynamic forces are considered to act.
Effective translational lift (ETL) is when the lift generation from the rotor disc is more efficient due to increased aircraft speed or wind.
Translating tendency is the movement of the helicopter to the right due to the combination of main rotor torque and tail-rotor anti-torque.
Transverse flow is the decreased lift at the rear of the rotor disc due to an increase in induced flow as the disc moves through the air, producing a roll to the right.
Blow-back is the rearward tilt of the rotor disc during the transition to forward flight.