Static Aero Elasticity Basics — Lesson 1

This lesson covers the fundamentals of static aero elasticity, focusing on the divergence of a 2D section and the torsional spring constant of an aerofoil. It explains the concept of the aerodynamic centre and the elastic axis of the wing, and how the offset between these two points affects the wing's performance. The lesson also discusses the equilibrium in torsion and how aerodynamic load affects the aerofoil. It further delves into the concept of the angle of attack and how it changes due to elastic deformation. The lesson concludes with an explanation of the diversion speed and the importance of aeroelastic analysis in aircraft structural design.

Video Highlights

03:21 - Explanation of the equilibrium in torsion and the aerodynamic load acting on the aerofoil.
06:15 - Explanation of the elastic deformation and the equilibrium in torsion .
10:58 - Discussion on the diversion speed and its relation to the torsional stiffness and density of air.
25:40 - Explanation of the aileron reversal using a 2D model.
35:19 - Discussion on the change in lift due to the deflection of the control surface .
62:58 - Explanation of the equilibrium equation for a long straight wing.

Key Takeaways

- The aerodynamic centre and the elastic axis of the wing play a crucial role in the performance of the wing.
- The offset between the aerodynamic centre and the elastic axis can significantly affect the wing's performance.
- The angle of attack changes due to elastic deformation, which in turn affects the aerodynamic load on the aerofoil.
- Understanding the concept of diversion speed is crucial in aircraft structural design.
- Aeroelastic analysis is essential in the design of aircraft structures to ensure optimal performance.