With a wing being a 3D shape I wonder if another figure is being included in the wing area. If you look at a wing from above and use this as an area to be measured that is one figure. If you were to look at an airfoil along its axis you would find that in most cases the bottom of the wing has some type of curve involved. If you were to adjust your wing area (let's call it lifting area for now) to incorporate the added length along the bottom half of the airfoil your effective wing area would be increased by that of the curvature on the lower side the chord line of the airfoil. Is this part of the calculation, or are figures being drawn from a 2D Y axis drawing?
B. Ferguson [email protected]

