Question

Aerodynamic center is defined as point on the airfoil at which

• A. moments are independent of angle of attack
• B. moments are zero
• C. moments are dependent on aspect ratio
• D. moments are independent of chord

Hint:

Understanding the aerodynamic center's location helps in predicting the behavior of an aircraft under various flight conditions and is crucial for effective design.

Answer 1

The Correct Option is A

Step 1: Define Aerodynamic Center.
The aerodynamic center of an airfoil is the point at which the pitching moment coefficient does not vary with changes in the angle of attack, at least over a practical range of angle of attack.
Step 2: Significance of the Aerodynamic Center.
This characteristic allows the aerodynamic center to be a critical point for analyzing and designing aircraft stability and control because stability about the aerodynamic center remains consistent regardless of small changes in angle of attack.