Question: what is the difference between a supercritical wing and a traditional wing?
Answer: When an aircraft with a conventional wing nears a speed of sound (Mach 1), air flowing across the top of the wing moves faster and becomes supersonic. ... Supercritical wings have a flat-on-top "upside down" look. As air moves across the top of a SCW it does not speed up nearly as much as over a curved upper surface.