Cruising From Canada, joined Jan 2001, 258 posts, RR: 0
Reply 3, posted (14 years 3 months 1 week 4 days 17 hours ago) and read 1734 times:
Rake wingtip provides better fuel burn than regular winglet. That is why they put on B767-400ER. And they are supposed to be placed on 747x and new 777's. Deltaair, If you want more detailed performance gain with raked winglets, let me know.