Following on from Mad scientists' post, an airfoil does not even need to be cambered in order to generate lift; a flat board will generate lift with sufficient angle of attack. For evidence you only need to look at the wings on those cheap balsa wood gliders that we have all played with at one time or another. The airfoil on these is simply another piece of flat balsa, it is the AOA that generates the lift by creating the exact same bernoulli effect, albeit less efficiently than a cambered airfoil.