Aero elasticity

Aeroelasticity in regard to aircraft structures is defined as the branch that investigates the phenomena that emerge due to the interaction of aerodynamic (in particular unsteady), inertial and elastic forces emerging during the relative movement of a fluid (air) and a flexible body (aircraft).

Introduction to Helicopter Aerodynamics ..

This chapter presents aerodynamic fundamentals and principles as they apply to helicopters. The content relates to flight operations and performance of normal flight tasks. It covers theory and application of aerodynamics for the pilot, whether in flight training or general flight operations.