Confusion about calculation of aerodynamic moments

AI Thread Summary
The aerodynamic moment for an airfoil is calculated based on the pressure distribution over its surfaces, typically about a reference point like the aerodynamic center. The confusion often arises from interpreting the formula for the lower surface, which may involve different reference points. The discussion highlights the importance of understanding the context and application of the formulas in "Fundamentals of Aerodynamics" by Anderson. Ultimately, the original poster resolved their confusion independently. Clarifying the reference point is crucial for accurate calculations of aerodynamic moments.
Nikhil05
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Hello,

Can anybody explain how the aerodynamic moment is calculated for an airfoil ?
I was reading the first chapter in "Fundamentals of Aerodynamics" by Anderson & the formula for aerodynamic moment for the lower surface of the airfoil confused me. Is the aerodynamic moment calculated about some other point for the lower surface ?
Thank you.
 
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need more information like page where to find in that book?
 
no need now, i figured it out myself. was just interpreting it wrongly.
 

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