Question: A thin airfoil has a circular-arc camber line with a maximum camber of 0.025 chord. Determine the theoretical pitching-moment coefficient and indicate methods by which this could be reduced without changing maximum camber. The camber line may be approximated by the expression
![2094_kc.png](https://secure.tutorsglobe.com/CMSImages/2094_kc.png)
where x' = x - 0.5c.