I am curious as to why you believe Supercritical Wings are less efficient than conventional wings.
Surely for a given thickness to chord ratio, Supercritical wings produce greater lift than conventional wings. This is primarily due to the camber on the lower surface towards the trailing edge.
Granted this creates structural problems, as so the wing might be heavier. But I don't know whether this cancels out the increased in lift.
Anyone care to shed light on this matter ?
Thanks