As we move forward to understand motion of aircraft from Pitch motion which is motion along with lateral axis to roll motion which is along longitudinal axis of aircraft, we must also understand the aircraft part which makes this motion possible.

The roll axis (longitudinal axis) has its origin at the center of gravity and is directed forward, parallel to the fuselage reference line. Motion about this axis is called roll. An angular displacement about this axis is called bank. A positive rolling motion lifts the left wing and lowers the right wing. The pilot rolls by increasing the lift on one wing and decreasing it on the other. This changes the bank angle.

 Roll Motion (Below mentioned aileron roll 1)

The ailerons are the primary control of bank. The rudder also has a secondary effect on bank. Ailerons are located at the rear of the wings. They are typically rectangular in shape and made of metal for stability and rigidity. Ailerons work in opposite directions. 

 For example, when the right aileron moves upward, the left aileron moves downward. Ailerons are used to bank the aircraft for turning. The aircraft’s movement around its longitudinal axis is called “rolling” or “banking”. This usually results in a change in flight path. 

Let’s understand this here

In the next edition we will talk about yaw motion of aircraft……..

By: Mr. Pradyumna Sharma (Sr. Manager – Ground Services)