RE: do ailerons provide lift?
After thinking about it for a minute, I'm going back to my original answer and say no. The ailerons themselves do not create lift and in some cases, may create down force depending the plane due to turbulent flow over the gaps between the ailerons between the trailing edge of the wing and the ailerons. Now if you build two wings, one with ailerons, and another without ailerons , but of equal wing chord, I don't see how having ailerons would create any more lift than the wing built with ailerons. So I'm still saying no.