Higney85 From United States, joined Nov 2005, 31 posts, RR: 0 Posted (3 years 1 week 2 days 21 hours ago) and read 8633 times:
I personally love the 757 with the winglets, why doesn't the 777 and 767 have them? They obviously help with fuel burn and look great. A 777 would be absolutely amazing with a pair. I heard rumors in the past about the entire boeing fleet getting them but it seems that the 73's and 75's have been the only aftermarket winglet customers....
ACYWG From Canada, joined Feb 2005, 265 posts, RR: 0 Reply 1, posted (3 years 1 week 2 days 21 hours ago) and read 8618 times:
Quoting Higney85 (Thread starter): why doesn't the 777 and 767 have them? They obviously help with fuel burn and look great. A 777 would be absolutely amazing with a pair.
The 767-400 series and also the later 777 models (773ER, 772LR) all have raked wingtips, which essentially offer the same advantage.
BHMBAGLOCK From United States, joined Jul 2005, 2671 posts, RR: 22 Reply 3, posted (3 years 1 week 2 days 21 hours ago) and read 8528 times:
Quoting Higney85 (Thread starter): it seems that the 73's and 75's have been the only aftermarket winglet customers....
There are a few 727s equipped with the aftermarket winglets. Trump and the FL company that does parabolic zero-g flights come to mind. Delta had one or two at one point and I was lucky enough to ride one.
Personally, I think 707 would look great with them. If the USAF decides to upgrade the KC-135 fleet it might even make sense to do.
DfwRevolution From United States, joined Mar 2004, 7654 posts, RR: 55 Reply 4, posted (3 years 1 week 2 days 21 hours ago) and read 8520 times:
Quoting Higney85 (Thread starter): I personally love the 757 with the winglets, why doesn't the 777 and 767 have them?
Aviation Partners has suggested winglets may be possible for both the 767 and 777, but as of yet, no customer has stepped forward.
Quoting Higney85 (Thread starter): I heard rumors in the past about the entire boeing fleet getting them but it seems that the 73's and 75's have been the only aftermarket winglet customers....
The only "in-house" winglet designed by Boeing is the 747-400 winglet and the 767-4, 777LR wingtip.
The 737NG and 757 winglets are all provided by Aviation Partners. It is possible that a customer request for AVPB Winglets be fitted during production of a 737NG by Boeing, but they are still Aviation Partners winglets.
YYZatcboy From Canada, joined Apr 2005, 402 posts, RR: 1 Reply 9, posted (3 years 1 week 2 days 19 hours ago) and read 8282 times:
Quoting DfwRevolution (Reply 4):
Aviation Partners has suggested winglets may be possible for both the 767 and 777, but as of yet, no customer has stepped forward.
It is because they look ugly (and yes that is my opinion and I am ready to be personally attacked for my views because that is what people like to do around here recently.)
KC135TopBoom From United States, joined Jan 2005, 5533 posts, RR: 36 Reply 12, posted (3 years 1 week 2 days 5 hours ago) and read 7760 times:
Quoting BHMBAGLOCK (Reply 3): Personally, I think 707 would look great with them. If the USAF decides to upgrade the KC-135 fleet it might even make sense to do.
You will never see them on the B-707. But the USAF and NASA did flight test winglets on a KC-135A back in the late 1970s and early 1980s. That was the testing that qualified winglets as a fuel saver. USAF never bought them because winglets reduce the cross wind componets for TO and landings.
Quoting 1337Delta764 (Reply 5): Who will make the 787-3's blended winglets, or the raked winglets of the 787-8 and 787-9?
Boeing.
Quoting YYZatcboy (Reply 9): It is because they look ugly (and yes that is my opinion and I am ready to be personally attacked for my views because that is what people like to do around here recently.)
As I said, the major drawback to winglets is the reduced cross wind componets. Raked wingtips are much more efficent, and don't reduce cross winds, that is why you won't see winglets on the B-747-ADV.
KBFIspotter From United States, joined May 2005, 716 posts, RR: 1 Reply 14, posted (3 years 1 week 1 day 23 hours ago) and read 6982 times:
What ever happened to the 747 Classic application? I saw a picture a while back in a copy of Airliners of APB flight testing the blended winglets on a 742F. I have heard nothing of this since... Is there an update?
AeroWeanie From United States, joined Dec 2004, 1511 posts, RR: 38 Reply 16, posted (3 years 1 week 1 day 22 hours ago) and read 6321 times:
Quoting KBFIspotter (Reply 14): What ever happened to the 747 Classic application? I saw a picture a while back in a copy of Airliners of APB flight testing the blended winglets on a 742F. I have heard nothing of this since... Is there an update?
BHMBAGLOCK From United States, joined Jul 2005, 2671 posts, RR: 22 Reply 17, posted (3 years 1 week 1 day 8 hours ago) and read 5942 times:
Quoting KC135TopBoom (Reply 12): You will never see them on the B-707. But the USAF and NASA did flight test winglets on a KC-135A back in the late 1970s and early 1980s. That was the testing that qualified winglets as a fuel saver. USAF never bought them because winglets reduce the cross wind componets for TO and landings.
Great info, thanks! Any chance that they could be retrofitted with raked tips or would this require a new wing design(obviously not practical if this is the case)?
THANK YOU! I'm always amazed by the fact that around here people drool over winglets. I mean, they're only winglets!! They're not there to make the plane look better (and in my opinion, on most planes, they make them look worse, a la 320 series), they're there to make them operate better, but only under certain conditions.
Winglets are good for making old wing designs more fuel efficient on long haul flights. But the reason the 777 never had winglets is because if you design the wing from scratch, today's technology allows engineers to make a wing that doesn't have the compromise requiring winglets.
The 737NGs can have the winglets because their wing was designed for short-haul flights. The winglets make them work better for long haul flights.
Sponsor Message: 
From United States, joined Nov 2005, 31 posts, 
From Canada, joined Feb 2005, 265 posts, 
From Bahamas, joined Jul 2005, 2931 posts, 
(and yes that is my opinion and I am ready to be personally attacked for my views because that is what people like to do around here recently.) 
From Netherlands, joined Jun 2005, 1061 posts, 
From Italy, joined Sep 2005, 105 posts,