Flynavy From , joined Dec 1969, posts, RR:
Reply 3, posted (7 years 2 months 1 day 8 hours ago) and read 10146 times:
The 767 winglets aren't even certified yet. Delta is also installing winglets on thie 767-300ERs. There are even studies of installing winglets on 777s - both AA and DL have been approach by APB for providing a 777 for testing.
No doubt. The project is currently under development by APB. The following article is dated in 2005 but development continues today - as I said with APB approaching DL and AA desiring a test frame.
Quote: And in perhaps its most ambitious step, Aviation Partners Boeing is now planning to develop winglets for Boeing's most advanced current model, the 777 twinjet, which carries up to 368 passengers in a typical three-class configuration.
"We're very excited about it," said Marino about the proposed 777 project. He said his company hopes to define the proposed winglets in the first part of this year and start offering a 777 retrofit package before year's end.
Marino said the proposed Boeing 777 "wing extensions" may not resemble the curved winglets his company developed for 737s. "When we do our development, we try to find the optimum shape for each airplane," Marino said.
Boo22 From , joined Dec 1969, posts, RR:
Reply 10, posted (7 years 2 months 21 hours ago) and read 4610 times:
AA and Boeing are going to test winglets this year on a 767. Boeing is currently conducting the baseline flight tests in southern California on an AA 767. Once they have the baseline data, they are going to install winglets and then do extensive flight testing later this year.
UAL727NE From United States of America, joined Dec 2007, 205 posts, RR: 0
Reply 11, posted (7 years 2 months 19 hours ago) and read 4385 times:
Thanks for all your posts guys!! I didnt know about the 777 getting them too. But yes the older 777's could use the winglets but yea newer ones like the 77L and stuff dont. Cant wait to see the 767 and 777 in them!!
Gotta love 3 holers!!! MD11,DC10,L-1011,B727 for life!!!!
What you, however, don't seem to know about (and in light of such, may want to refrain from throwing stones); is that APB wasn't able to gain access to the patents that BCA-proper has for the raked wingtip design and application... which is the primary reason behind why they cannot retro install it.
PhilSquares From , joined Dec 1969, posts, RR:
Reply 13, posted (7 years 2 months 17 hours ago) and read 4074 times:
Quoting ConcordeBoy (Reply 12): What you, however, don't seem to know about (and in light of such, may want to refrain from throwing stones); is that APB wasn't able to gain access to the patents that BCA-proper has for the raked wingtip design and application... which is the primary reason behind why they cannot retro install it.
No stones. Source. APB is Airline Partners Boeing.
Dc10s2hnl From New Zealand, joined Aug 2006, 173 posts, RR: 0
Reply 14, posted (7 years 2 months 16 hours ago) and read 3944 times:
I woulda thunk the winglets' benefits for long-distance flights would of made the widebody planes an earlier candidate for the winglets as opposed to 737s and 757s... anybody know if anything is going on at Airbus with raked winglets, besides the failed ones on the A320? For example, replacing the 'fences' on the A330 with some?
UAL747 From , joined Dec 1969, posts, RR:
Reply 16, posted (7 years 2 months 16 hours ago) and read 3800 times:
The new 767 winglets will add about 10 feet of wingspan to the 767 and they will be 11 feet tall!! Aviation Partners Boeing has a diagram of it on their website, though the drawings are rather crude and not to scale. In fact, from the side view, it looks like they just put more windows on the 737 and called it a 767.
I think it will bring an all new sexy look to an otherwise very boring plane.
Somewhere I read that the ones for the 777 would be around 13' tall.
On a side note, I did not know that the 757 and 737 basically share the same winglet. They are both 8 feet 2 inches tall.
Tdscanuck From Canada, joined Jan 2006, 12710 posts, RR: 80
Reply 19, posted (7 years 2 months 11 hours ago) and read 3411 times:
Quoting EBJ1248650 (Reply 9):
Wouldn't it be just as easy to install the cranked wingtips on older 777s as it would be to install winglets?
Raked wingtips increase outboard wing loading more than winglets. You need to do more structural work to take a raked wingtip, which could kill the economics. It's possible they have enough margin to support a winglet but not a raked wingtip.
Quoting Dc10s2hnl (Reply 14): I woulda thunk the winglets' benefits for long-distance flights would of made the widebody planes an earlier candidate for the winglets as opposed to 737s and 757s...
Winglets only make sense when you're span constrained or margin constrained, and you have a wing with sufficient margin to take them in the first place. Long-distance aircraft tend to be larger and have less span constraint, which is why you see them favoring raked wingtips over winglets.