This textbook gives a brief idea about the modern aircraft used in defense and for commercial purposes. Aerospace technology in its present form has developed along certain basic principles of aerodynamic forces. Different parts in an airplane have different functions to balance the aircraft in air, provide a thrust, and control the general mechanisms. Profusely illustrated descriptions provide a picture of what kinds of aircraft are used for cargo, passenger travel, bombing, and supersonic flights. Propulsion principles and descriptions of different kinds of engines are quite helpful. At the end of each chapter, new terminology is listed. The book is not available on the market and is to be used only in the Air Force ROTC program. (PS)