Greetings, I know that in the early 80s a Continental DC-10 was tested with winglets, that led to them being used on the MD-11. From what I understand they were never certified for the DC-10, but with all the testing I don't see how it would have been to difficult to get the paperwork done. Fast forward to the 2000s, with FedEx acquiring a huge fleet of DC-10 10/30, gas prices really jumped off the charts for the first time to sky high numbers. My question is why FedEx did not look into the winglets for their fleet, I figure the cost for certification would have been quite a bit less because of the early 80s test. I know the fleet is on the way out now and it would not be feasible, but would there have been a substantial savings in fuel usage if the winglets had been applied 10 years ago?
[Edited 2013-08-18 09:58:15]
[Edited 2013-08-18 09:59:02]