books.google.ru - This book is modern treatment of the aerodynamic principles of helicopters and rotating-wing vertical lift aircraft. Part one covers the technical history of helicopter flight, and basic methods of rotor aerodynamics, and performance related design issues. Part two contains advanced topics in helicopter...http://books.google.ru/books/about/Principles_of_Helicopter_Aerodynamics.html?hl=ru&id=nMV-TkaX-9cC&utm_source=gb-gplus-sharePrinciples of Helicopter Aerodynamics
