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CO 752 Winglet Update?  
User currently offlineAA737-823 From United States of America, joined Mar 2000, 5813 posts, RR: 11
Posted (9 years 5 months 3 weeks 9 hours ago) and read 2509 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...

Thoughts? News?
R

11 replies: All unread, jump to last
 
User currently offlineSkibum9 From United States of America, joined Nov 2001, 1229 posts, RR: 0
Reply 1, posted (9 years 5 months 3 weeks 9 hours ago) and read 2488 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.



Tailwinds!!!
User currently offlineSTT757 From United States of America, joined Mar 2000, 16865 posts, RR: 51
Reply 2, posted (9 years 5 months 3 weeks 6 hours ago) and read 2378 times:

March 18th at Tucson Arizona:


MyAviation.net photo:
Click here for bigger photo!
Photo © Jeremy Carlson




Eastern Air lines flt # 701, EWR-MCO Boeing 757
User currently offlineLN-MOW From United States of America, joined Jan 2000, 1908 posts, RR: 13
Reply 3, posted (9 years 5 months 3 weeks 6 hours ago) and read 2377 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.



- I am LN-MOW, and I approve this message.
User currently offlineNewark777 From United States of America, joined Dec 2004, 9348 posts, RR: 29
Reply 4, posted (9 years 5 months 3 weeks 5 hours ago) and read 2363 times:

Quoting Skibum9 (Reply 1):

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.

Harry



Why grab a Heine when you can grab a Busch?
User currently offlineNbgskygod From United States of America, joined May 2004, 815 posts, RR: 1
Reply 5, posted (9 years 5 months 3 weeks 5 hours ago) and read 2349 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."
User currently offlineMaverickM11 From United States of America, joined Apr 2000, 17491 posts, RR: 45
Reply 6, posted (9 years 5 months 3 weeks 5 hours ago) and read 2345 times:

I saw it takeoff in TUS on 3/14.


E pur si muove -Galileo
User currently offlineCOEWRNJ From United States of America, joined Oct 2003, 1064 posts, RR: 19
Reply 7, posted (9 years 5 months 3 weeks 4 hours ago) and read 2271 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.

User currently offlineN1120A From United States of America, joined Dec 2003, 26487 posts, RR: 75
Reply 8, posted (9 years 5 months 3 weeks ago) and read 2106 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



Mangeons les French fries, mais surtout pratiquons avec fierte le French kiss
User currently offlineUswyjer From , joined Dec 1969, posts, RR:
Reply 9, posted (9 years 5 months 2 weeks 6 days 23 hours ago) and read 2087 times:

that's my pic above! Smile 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


User currently offlineFlyHoss From United States of America, joined Feb 2005, 598 posts, RR: 0
Reply 10, posted (9 years 5 months 2 weeks 6 days 23 hours ago) and read 2080 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.


A little bit louder now, a lil bit louder now...
User currently offlineFlyf15 From , joined Dec 1969, posts, RR:
Reply 11, posted (9 years 5 months 2 weeks 6 days 23 hours ago) and read 2082 times:

I saw it in TUS on March 27th...

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