An aircraft engine is the component of the propulsion system for an aircraft that generates mechanical power. Aircraft engines are almost always either lightweight piston engines or gas turbines. The Combat aircrafts play a pivotal role in the defense of air worthiness of any nation. These have mostly turbo-jet engines which are generally air breathing type. This work presents the basic concepts of operation and various manufacturing processes adopted for various jet engines.

Mr Aman gupta holds masters degree from Punjab technical university and has research interests in fluids and acosutics.Mr Sunny Narayan has mechanical engineering degree from university of Bristol-U.K.His areas of research include fluid machinery ,heat transfer aand thermal sciences.