na
Posts: 9301
Joined: Sun Dec 12, 1999 3:52 am

Winglets On 747 Classics - Why No Success

Wed Dec 06, 2006 7:24 pm

In 2000 Aviation partners tested huge blended winglets on a 742 freighter, registered N639FE, a former Fedex/Flying Tigers/SAS airplane (no photo w. winglets available on a.net). Why has no 747 Classic ever been equipped with them. Too expensive? I mean, on a 747, winglets must save $$$, so why was the project quietly cancelled?
 
Bongodog1964
Posts: 3260
Joined: Wed Oct 18, 2006 6:29 am

RE: Winglets On 747 Classics - Why No Success

Wed Dec 06, 2006 7:48 pm

Probably because theres not much mileage left in 747 classics

The newest must be approaching 20 years old and there must be a severe fuel burn disadvantage compared to the latest 747 freighters.

IMO any upgrade would need to change the propulsion as well as adding winglets; and in all probability the airframe wouldn't have enough life left to justify it
 
aeroweanie
Posts: 1576
Joined: Fri Dec 03, 2004 9:33 pm

RE: Winglets On 747 Classics - Why No Success

Thu Dec 07, 2006 2:38 am

747 Classics are a dying breed, so the market just wasn't there.

 
DCrawley
Posts: 328
Joined: Mon Jun 06, 2005 3:18 am

RE: Winglets On 747 Classics - Why No Success

Thu Dec 07, 2006 3:43 am

I could just imagine standing next to those 15 foot winglets. Incredible, thank you for the picture Aeroweanie.
"Weather at our destination is 50 degrees with some broken clouds, but they'll try to have them fixed before we arrive."
 
jcded
Posts: 197
Joined: Fri Jan 30, 2004 8:40 pm

RE: Winglets On 747 Classics - Why No Success

Thu Dec 07, 2006 12:31 pm

Those would look hot on Air Force 1
You breathe to do good and have fun.
 
A342
Posts: 4017
Joined: Sun Jul 31, 2005 11:05 pm

RE: Winglets On 747 Classics - Why No Success

Fri Dec 08, 2006 2:31 am

Quoting Bongodog1964 (Reply 1):
Probably because theres not much mileage left in 747 classics

I think they have achieved a 7% saving in fuel burn, but don't quote me on that ! So just let's say they reduce fuel burn by 4%, on a thirsty 747 Classic, this means huge savings ! The classics of some operators will be around for some time to come, e.g. Kalitta or MK airlines, so I think the programme would have made sense. IMO the fuel price was't high enough at that time.
Exceptions confirm the rule.

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