Stitch From United States of America, joined Jul 2005, 32936 posts, RR: 85
Reply 3, posted (8 years 11 months 2 days 12 hours ago) and read 12142 times:
The 787-3 will have the more traditional "winglets" that flow up from the end of the wing. The 787-8 and 787-9 (and probably any larger variants) have the blended wingtips that cant back parallel to the wing ala the 764ER, 772LR, and 773ER.
DfwRevolution From United States of America, joined Jan 2010, 1073 posts, RR: 50
Reply 4, posted (8 years 11 months 2 days 11 hours ago) and read 12086 times:
The 787-8/9 and 747-8 use a style of blended wingtip that was actually pioneered by Fairchild Dornier before they went defunct. It's considered more advanced than the flat wedge-like wingtip on the 777LR and 764ER.
And as others have said, the 787-3 has a 737NG-like vertical winglet to reduce span distance and allow the aircraft to fit into smaller gates. It will also provide more lift on lower-speed take-offs and landings.