This book is developed to serve as a concise text for a course on helicopter aerodynamics at the introductory level. It introduces to the rotary-wing aerodynamics, with applications to helicopters, and application of the relevant principles to the aerodynamic design of a helicopter rotor and its blades. The basic aim of this book is to make a complete text covering both the basic and applied aspects of theory of rotary-wing flying machine for students, engineers, and applied physicists. Considerable number of solved examples and exercise problems with answers are coined for this book. SALIENT FEATURES To provide an introductory treatment of the aerodynamic theory of rotary-wing aircraft To study the fundamentals of rotor aerodynamics for rotorcraft in hovering flight, axial flight, and forward flight modes To perform blade element analysis, investigate rotating blade motion, and quantify basic helicopter performance TARGET AUDIENCE BE/B.Tech (Aeronautical/Aerospace Engineering)