Fundamentals of helicopter dynamics This is an introductory book on helicopter dynamics. The aim of this book is to introduce the students engineers to the basic principles of helicopter dynamics. The book focuses on three major topics: (i) rotor blade idealization and blade dynamics in flap lag and torsion modes; (ii) rotor blade aeroelastic stability {coupled flap lag and coupled flap torsion}; (iii) coupled rotor fuselage dynamics. It covers hover forward flight and other manoeuvre flights. Starting from basic physics of rotating systems the equations of motion have been derived in vector form.