Pitch, Roll and YawPitch, Roll and Yaw have an analogy with imaginary lines (three in number) that run through a typical airplane and intersect at right angles at the airplane's center of gravity.  Pitch-Rotation about the lateral axis. Roll-Rotation about the fore-aft axis. Yaw rotation about the vertical axis. Maintaining Control FIGURE 1 Maintaining Controls Push the tail to the right or left. The rudders using the ailerons turn the plane. The ailerons control the roll. Two ailerons on the rear outer edge of each wing move in opposite directions, i.e. up and down, increasing lift on one wing while decreasing it on the other. Therefore, the plane rolls to the right or left. The ailerons tilt the wings in the required direction and thus turn the aircraft. The Elevator Controls Pitch The elevator tilts downward or upward on a horizontal surface of the tail, resulting in an increase or decrease in tail lift. The nose of an airplane is tilted downward or upward. Primary Control SurfacesAileronsAirplanes use aileron tabs or ailerons to achieve lateral control. The ailerons are hinged on the outer edge of the wings; they are mobile and controlled from the cockpit via a mechanical link. When lowered, the aileron increases the wing's angle of attack, thereby increasing lift; and vice versa. This allows an aircraft to roll sideways around the longitudinal axis. But over time, the plane tilts in the direction of the yaw. The above phenomena occur due to the increased speed of the wing as opposed to the middle of paper...... moving surface, which is fixed to a vertical. the stabilizer (fixed surface) deflects for generation of lift force in the lateral direction. Since the rudder and vertical stabilizer are towards the rear of the aircraft, i.e. some distance from the aircraft's center of gravity, this implies that the lift force that they generate results in a moment around the vertical axis (y axis) which results in a plane. for yaw.FIGURE 7 Yaw (rotation along z-axis)ReferencesCAA Flight Instructor Guide. (nd). Retrieved April 12, 2014 from New Zealand Civil Aviation Authority: www.caa.govt.nzHandbook of Aeronautical Knowledge. (nd). Retrieved April 12, 2014 from the Federal Aviation Administration: www.faa.gov/NASA. (2013). Control surfaces. Retrieved April 12, 2014 from the National Aeronautics and Space Administration: hhtps://flight.nasa.gov/pdf/axes_control_surfaces_5-8.pdf