Aircraft aerofoil with improved lift-drag ratio

摘要

The aerofoil incorporates a leading edge (13) and a trailing edge (14) longitudinally displaced. A continuous lower surface (21), defining the lower chamber of the airfoil, extends from the leading edge to the trailing edge. The upper surface of the airfoil incorporates a first upper surface extending rearwardly from the leading edge and terminating in an offset (20), with at least a second upper surface extending rearwardly from this. The first upper surface defines a first upper camber portion of the airfoil and the second upper surface a second upper camber.