Aerospace engineering is a branch of engineering that studies the design and development of aircraft and spacecraft. It branches into the two major disciplines of aeronautical engineering and astronautical engineering. The principles of propulsion are of utmost importance in aerospace engineering. An aircraft moves due to energy provided by jet engines, internal combustion engines and turbomachinery. Electric propulsion and ion propulsion are recent propulsion techniques. Modern aerospace engineering also uses computational fluid dynamics to simulate the behavior of fluids, reduce time and expenses. Further, the integration of software such as ground control software, flight software and test & evaluation software has resulted in the advancement of this field. This book attempts to understand the multiple branches that fall under the discipline of aerospace engineering and how such concepts have practical applications. The various studies that are constantly contributing towards advancing technologies and evolution of this field are examined in detail. Those with an interest in aerospace engineering would find this book helpful.