Inverse modeling is a powerful tool used to design modern airfoils. The designer defines a velocity profile that will meet a set of desired characteristics such as boundary layer growth, lift coefficient, and pitching moment and then an airfoil is created which will give the desired velocity profile. The velocity profile may be altered as necessary to modify the airfoil characteristics until the design criteria is met. In AeroFoil, the creation of a velocity profile is performed in a highly intuitive way, with estimates of lift coefficient and pitching moment being automatically updated and displayed at any desired angle of attack.