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Gillbilly
Topic Author
Posts: 29
Joined: Sat Jan 04, 2020 1:46 pm

Wingletless DL 752s

Thu Nov 26, 2020 1:41 am

Do the Delta 752s without winglets belong to a distinctly different category within the 752 fleet at Delta or is it somewhat random?

Are they generally older? From a different original airline? Different cabin configuration?

And, are they utilized on different routes than the 752s that do have winglets at Delta?

Thanks in advance.
 
Dalmd88
Posts: 3160
Joined: Fri Jul 28, 2000 3:19 am

Re: Wingletless DL 752s

Thu Nov 26, 2020 2:37 am

I think there are only a couple of wingletless flying in the Delta fleet. That doesn't include the NBA 752 fleet which I think had the winglets removed. The stage length of their typical flights make them uneconomical to operate.

Those that don't have winglets have structural issues that prevented the winglet mod from being installed. The mod was not just a simple swap out the wing tip sort of deal. There was a lot of internal wing mod work that need to be installed to add strength to the spars and stringers of the wing. Existing repairs to these structures, or the wing skins made a few aircraft ineligible for the mod.
 
Gillbilly
Topic Author
Posts: 29
Joined: Sat Jan 04, 2020 1:46 pm

Re: Wingletless DL 752s

Thu Nov 26, 2020 2:04 pm

Dalmd88 wrote:
I think there are only a couple of wingletless flying in the Delta fleet. That doesn't include the NBA 752 fleet which I think had the winglets removed. The stage length of their typical flights make them uneconomical to operate.

Those that don't have winglets have structural issues that prevented the winglet mod from being installed. The mod was not just a simple swap out the wing tip sort of deal. There was a lot of internal wing mod work that need to be installed to add strength to the spars and stringers of the wing. Existing repairs to these structures, or the wing skins made a few aircraft ineligible for the mod.


Thank you for sharing, very interesting. The last three DL 752 flights I can remember were all lacking winglets!
 
GSOtoIND
Posts: 142
Joined: Mon Aug 13, 2018 10:46 pm

Re: Wingletless DL 752s

Thu Nov 26, 2020 6:35 pm

From what I remember, some of the 757s were originally slated to get winglets during their most recent reconfiguration, but Delta changed the plan because of low oil prices. It could be that the damaged aircraft could have winglets fitted, but it would require more extensive and expensive repairs, and such a mod wouldn't have a positive ROI with crude below $50 a barrel.
 
N965UW
Posts: 128
Joined: Wed Jul 29, 2020 11:31 pm

Re: Wingletless DL 752s

Thu Nov 26, 2020 7:46 pm

Did some research on Planespotters and looked through photos. The following non-NBA 752s don't have winglets:

N668DN
N671DN
N673DL
N674DL
N675DL
N676DL
N678DL
N679DA
N680DA
N681DA
N682DA
N683DA
N684DA
N697DL
N698DL

I may have missed a few, but these are the ones still in the fleet (some are parked due to COVID but many are still active).
You can always go around
 
N965UW
Posts: 128
Joined: Wed Jul 29, 2020 11:31 pm

Re: Wingletless DL 752s

Thu Nov 26, 2020 7:49 pm

Also, does anybody know about the MTOW on these? Pretty sure the ex-TWA 752s are 255,000 lbs, but I'm curious as to whether the rest are 220k or 240k.
You can always go around
 
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747classic
Posts: 3455
Joined: Sat Aug 15, 2009 9:13 am

Re: Wingletless DL 752s

Thu Nov 26, 2020 9:15 pm

According the info from Aviation Partners Boeing, one of the requirements for a 757-200 winglet installation is a 255.00lbs capable wing.

See "system description" at the bottom of the page : http://www.aviationpartnersboeing.com/p ... tionalInfo
Operating a twin over the ocean, you're always one engine failure from a total emergency.
 
phatfarmlines
Posts: 1637
Joined: Thu Sep 27, 2001 12:06 pm

Re: Wingletless DL 752s

Fri Nov 27, 2020 2:27 am

N965UW wrote:
Did some research on Planespotters and looked through photos. The following non-NBA 752s don't have winglets:

N668DN
N671DN
N673DL
N674DL
N675DL
N676DL
N678DL
N679DA
N680DA
N681DA
N682DA
N683DA
N684DA
N697DL
N698DL

I may have missed a few, but these are the ones still in the fleet (some are parked due to COVID but many are still active).


Did these aircraft get the 199-seat mod with PTV's & 777-style pivot bins?
 
Gillbilly
Topic Author
Posts: 29
Joined: Sat Jan 04, 2020 1:46 pm

Re: Wingletless DL 752s

Fri Nov 27, 2020 2:58 am

So, looking at the photos on this site, it looks like N650DL started without winglets, got them, then had them removed. Why would they remove them?
 
N965UW
Posts: 128
Joined: Wed Jul 29, 2020 11:31 pm

Re: Wingletless DL 752s

Sat Nov 28, 2020 8:36 pm

747classic wrote:
According the info from Aviation Partners Boeing, one of the requirements for a 757-200 winglet installation is a 255.00lbs capable wing.

See "system description" at the bottom of the page : http://www.aviationpartnersboeing.com/p ... tionalInfo


Interesting. Although there is probably a distinction between a 255,000 lbs. "capable" wing and an aircraft that is actually certified for 255k. IIRC, United's PW 757s are all 240k and have winglets, so it would follow that while structurally capable of 255, UA only has them certified for 240.

Good article on the differences within the UA fleet: https://crankyflier.com/2011/02/14/why- ... to-europe/

phatfarmlines wrote:
Did these aircraft get the 199-seat mod with PTV's & 777-style pivot bins?


According to Delta's website, only the 75D and 75H subtypes have the 199 seat config. The 75G has 193, 75S 168, and then there's the 75C which I believe are the NBA charter planes. Somebody more well-versed in DL's 757 subtypes will have to clarify.
You can always go around
 
User avatar
Boeing757100
Posts: 394
Joined: Wed May 06, 2020 10:09 pm

Re: Wingletless DL 752s

Sat Nov 28, 2020 11:46 pm

Gillbilly wrote:
So, looking at the photos on this site, it looks like N650DL started without winglets, got them, then had them removed. Why would they remove them?




I think its one of the basketball charters, as the config. as of now is F72.
Boeing is bringing back the 707 tomorrow, with Shinkai as the Chief Executive Officer and FLAIRPORT as the Chief Financial Officer.

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