An airfoil is the cross-section of of a wing or a blade. The ultimate function of the airfoil is that it allows the body to move through a fluid while producing maximum lift and minimum drag. Therefore an entire field of engineering called airfoil theory is concerned with optimizing the shape of the airfoil. The weight per unit length of the cross-section play an important role in determining the effectiveness of the airfoil. The larger the weight the less lift the airfoil is able to produce. Therefore, with the utilization of WAAM, large strides were taken in the optimization of the airfoil shape as hollow airfoils with strategically places supports could now be manufactures with relative ease thus reducing the cost and increasing the efficiency of the airfoil.