AA737-823
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CO 752 Winglet Update?

Fri Apr 01, 2005 6:53 am

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
 
skibum9
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 6:58 am

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!!!
 
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STT757
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 9:54 am

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
 
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LN-MOW
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 9:54 am

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.
 
Newark777
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 10:02 am

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?
 
NBGSkyGod
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 10:11 am

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.
Pilots are idots, who at any given moment will attempt to kill themselves or others.
 
MaverickM11
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 10:12 am

I saw it takeoff in TUS on 3/14.
E pur si muove -Galileo
 
COEWRNJ
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 11:01 am

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
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 3:55 pm

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
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 4:20 pm

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
 
FlyHoss
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 4:28 pm

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...
 
flyf15
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RE: CO 752 Winglet Update?

Fri Apr 01, 2005 4:33 pm

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

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