Good find SD and an interesting read indeed. (If maybe a bit outdated "A3XX")
It sounds silly, but I am a fan of winglets (especally now after reading that article and seeing the figures!!!) but I think from an aesthetic point of view theyre great and a nice design touch... A330 - mmmm
Can anybody explain to me which the incident and cant angles are? I could guess - Incident is the angle where the face of the winglet meets the top surface of the wing, and the cant angle being the difference between the 'leading edge' of the winglet and the vertical axis - but I am more than likely wrong!
JB