[quote][b][url=/v3/forum/questions-g%C3%A9n%C3%A9rales-et-techniques-41/topic/winglets-279/?post=32738#post-32738]ex-raptor[/url] a dit le 19/02/2006 à 20:35 :[/b]

Oui Tuckson, 
les raked wingtips sont dans le même plan que les ailes.

J'ai trouvé ça sur les raked wingtips:

"A new feature was the raked wingtip: while designing the earlier versions of the 777 in the early 1990s, Boeing had discovered that the drag reduction of the winglets it had introduced on the 747-400 a few years earlier could be matched by a wingspan increase corresponding to 4/5 of the winglet's size, while saving the structural reinforcement at the end of the wings. But the engineering work provided a new approach in 1998; a wing extension swept at a higher angle than the actual wing. This new concept enables to keep the advantages of the winglet but without stretching wingspan too much – which can be a concern for airplanes at the airport gate. And according to Boeing, the 767-400ER's first year of operation would have showed a 5% reduction in fuel consumption. The raked wingtips, nonetheless, slightly increased the airplane's wingspan by around 4m (13.12ft) to 64.8m (212.54ft)."

source : [url]http://airtransportbiz.free.fr/Aircraft/777X-9.html[/url][/quote]