Reply To: How to find the aerodynamic center of a blended wing body?

[mcoderon]

Hello,
depending on the profile of the wing and the flying speed the aerodynamic center could deviate from the quarter chord. This should give you an idea whether you have a situation close to the thin airfoil theory the quarter-chord position is based on.
You can find on textbooks generic formulae based on the first and second derivative(wrt the angle of attack) of the LE moment and the normal and tangential forces acting on the wing section that can be combined to find the 2 coordinates of the local aerodynamic center (on a plane). This means that you need to get the solution on multiple angles of attack to estimate the derivatives and then extend the analysis to a 3D case. Especially for complex models it is not just a 1 click solution.