The MD-11, like the DC-10, does not have slats that stick out past the trailing edge of the main wings. The DC-10 never did, and I thought the MD-11 is in the same boat. Compare it to any other pic of the trailing edge of any MD-11. Post the pic if you find one that matches the Delta pic.
Ding! You are now free to keep supporting Frontier.
I think so. After AA cursed the M11 and bitched about it openly, McDD did lots to boost the range (mainly) of the thing. I think Delta were the only ones to recieve the full all singing and dancing package.
The first one (DL) has the revised flaps fairings which extend quite a bit over the trailing edge unlike the more ´classic ´ layout on earlier prod.- MD-11´s .
As the armchair specialist that I am I can only tell you that I remind MDD and Swissair and other carriers as well together having developed these ´canoe fairings´as part of a whole package of aerodynamics enhancement back in the nineties to eventually overcome the initial shortcomings of the performances the MD-11 suffered from when it was introduced into airline service.
The new fairings are mainly reducing drag (hence saving fuel ,don´t have the exact figures however ).They have been developed for the PW-powered MD-11´s since the PW ´s were consuming more fuel than predicted .