This document discusses the yaw motion of aircraft. It defines yaw motion as a side-to-side movement of the nose caused by deflecting the rudder, which is located on the rear vertical stabilizer. It explains that deflecting the rudder to one side generates a side force in the opposite direction through the rudder's airfoil shape. This side force creates a torque that rotates the aircraft about its center of gravity, allowing the pilot to steer the nose left or right. Vertical stabilizers and rudders are designed with a symmetric airfoil so that side force can be produced in either direction depending on rudder deflection.

1. AIRCRAFT YAW MOTION
Submitted by-
Prachi Sahu
14/610
Submitted to-
Sir Anshul
Bansal

2. INTRODUCTION
A three dimensional coordinate system can be defined
through the center of gravity with each axis of this coordinate
system perpendicular to the other two axes.
The orientation of the aircraft by the amount of rotation of
the parts of the aircraft along these principal axes.
The yaw axis is perpendicular to the wings and lies in the
plane of the aircraft centerline.

3. A yaw motion is a side to side movement of the nose of
the aircraft.
The yawing motion is being caused by the deflection of
the rudder of aircraft. The rudder is a hinged section at the
rear of the vertical stabilizer.

5. WORKING
By changing the angle of deflection at the rear of an airfoil
changes the amount of lift generated by the foil.
For the vertical stabilizer and rudder, the orientation of the
airfoil causes a side force to be generated. With greater
deflection of the rudder to the left, the side force increases to
the right.
With greater deflection to the right, the side force increases
to the left.

6. The lift generated by the rudder acts through the center of
pressure of the rudder and vertical stabilizer and is located at
some distance from the center of gravity of the aircraft.
 The change in side force created by deflecting the rudder
generates a torque about the center of gravity which causes
the airplane to rotate.
The pilot uses this ability to keep the nose of the aircraft
pointed in the direction of travel.

8. On all aircraft, the vertical stabilizer and rudder create
a symmetric airfoil.
This produces no side force when the rudder is aligned with
the stabilizer and allows the combination to produce either
positive or negative side force, depending on the deflection of
the rudder.
Some fighter planes have two vertical stabilizers and
rudders because of the need to control the plane with
multiple, very powerful engines.

9. THANK YOU