A variable camber airfoil is an airfoil that changes camber to maximize its performance under radically different flight conditions. Little attention has been paid to the history of flow ...

This study represents an extension to cambered airfoils of a previous work on symmetric ones. The model used is the multiple-streamtube one and the airfoils have Göttingen profiles — the only ones for ...

If you can understand why a cambered aerofoil generates lift at zero angle of attack but a symmetrical one does not, you can ignore everything else I have said.