کتاب Helicopter aerodynamic for student pilots: contains over 80 questions and answers complies wit اثر پوریا کمانی فرد نشر کنکاش

This project could not have been accomplished in such a short time without the help of many individuals and groups. I thank Iranian Army Aviation Training Center Academy, for giving me the opportunity to teach, to carry out my research, and to write. I thank my students, past and present. Their interest and energy is what makes it worthwhile.