AA737-823 From United States of America, joined Mar 2000, 5338 posts, RR: 11 Posted (8 years 1 month 3 weeks 1 day 21 hours ago) and read 1641 times:
I thought I'd start a topic to see if anyone knew about the progress of the winglet testing on the 757-200s.
Someone mentioned, in another post, that the 752 might lose CatIII autoland because the plane was floating too much on short final.
If so, wouldn't that negate any cost benefit the winglets would earn? Having to divert to an airport with better weather is not free...
Skibum9 From United States of America, joined Nov 2001, 1229 posts, RR: 0 Reply 1, posted (8 years 1 month 3 weeks 1 day 21 hours ago) and read 1620 times:
I've got a good question.....
Right now with a typical, non-winglet 757, additional spacing is given to planes behing them because of wake turbulence. After a take off roll of a 757, typically a plane behind it, waiting to take off, will be held 120 seconds to allow the wake turbulence to subside. With the new winglets, will this diminish the wake turbulence sufficiently to enable reduced spacing behind a 757 with winglets? In theory, I would think so.
STT757 From United States of America, joined Mar 2000, 16256 posts, RR: 52 Reply 2, posted (8 years 1 month 3 weeks 1 day 18 hours ago) and read 1510 times:
LN-MOW From United States of America, joined Jan 2000, 1896 posts, RR: 15 Reply 3, posted (8 years 1 month 3 weeks 1 day 18 hours ago) and read 1509 times:
Quoting AA737-823 (Thread starter): Someone mentioned, in another post, that the 752 might lose CatIII autoland because the plane was floating too much on short final.
I heard that too, from a friend in CO. He didn't expect it to become an issue, though.
CO is said to be very pleased with the performance of the winglet-bird.
Newark777 From United States of America, joined Dec 2004, 9348 posts, RR: 33 Reply 4, posted (8 years 1 month 3 weeks 1 day 18 hours ago) and read 1495 times:
Someone in a different thread that the wake turbulence was caused by the configuration of the wing, and the winglets wouldn't do too much to alleviate it. I am by no means an expert, but that is what I heard.
Nbgskygod From United States of America, joined May 2004, 597 posts, RR: 1 Reply 5, posted (8 years 1 month 3 weeks 1 day 18 hours ago) and read 1481 times:
The wake turbulence separation is based on aircraft weight rather than wing design. Since the 757 is close to the heavy weight category they gave it a separate category. So the application of winglets would have no affect on the wake turbulence separation, even if it did change the characteristics of the vortex off the wing.
"I use multi-billion dollar military satellite systems to find tupperware in the woods."
MaverickM11 From United States of America, joined Apr 2000, 15722 posts, RR: 47 Reply 6, posted (8 years 1 month 3 weeks 1 day 18 hours ago) and read 1477 times:
COEWRNJ From United States of America, joined Oct 2003, 1061 posts, RR: 21 Reply 7, posted (8 years 1 month 3 weeks 1 day 17 hours ago) and read 1403 times:
It was in TUS as recently as the 21st of March. I was shocked to see it when I landed. It's a nice looking plane though.
N1120A From United States of America, joined Dec 2003, 25852 posts, RR: 79 Reply 8, posted (8 years 1 month 3 weeks 1 day 12 hours ago) and read 1238 times:
Quoting Nbgskygod (Reply 5): The wake turbulence separation is based on aircraft weight rather than wing design. Since the 757 is close to the heavy weight category they gave it a separate category. So the application of winglets would have no affect on the wake turbulence separation, even if it did change the characteristics of the vortex off the wing.
The reason of the Wake/Weight corrolation is because of the larger wingspan and width of the cabin, and what that does to wind displacement. The DC-10's configuration actually gives it a much stronger wake than the 747, even though it is much lighter. Most DC-8s are heavier than the 752, but they don't have wake cautions because of their configuration. The 752's design created a very strong wake (stronger than its sister 767) and required a warning from ATC.
Winglets will not change this
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Uswyjer From , joined Dec 1969, posts, RR: Reply 9, posted (8 years 1 month 3 weeks 1 day 12 hours ago) and read 1219 times:
that's my pic above! Sorry about the quality we were taking off and i just shot where it was parked and hoped my digital would focus on the right spot... and by some miracle it did. It landed as we were waiting in line with an America West CRJ900 and a bunch of overflow fighters from Monthan, it looked really sleek with the high winglets.
-Jeremy
FlyHoss From United States of America, joined Feb 2005, 598 posts, RR: 0 Reply 10, posted (8 years 1 month 3 weeks 1 day 12 hours ago) and read 1212 times:
The CO 757-200 (ship #134) will go winglet-less soon, until the certification is complete (late May). Last I heard, CO expected to have 6 752s equipped with winglets by the end of June.
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From United States of America, joined Mar 2000, 5338 posts, 
Sorry about the quality we were taking off and i just shot where it was parked and hoped my digital would focus on the right spot... and by some miracle it did. It landed as we were waiting in line with an America West CRJ900 and a bunch of overflow fighters from Monthan, it looked really sleek with the high winglets. 
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