By: wysiwyg - 29th July 2004 at 23:34
Agree with the above about the raked winglets.
A330 and A340 can despatch with one winglet missing but the drag penalty becomes too great with both missing.
By: tenthije - 29th July 2004 at 22:38
The 777-300ER come with winglets, as do the 767-400s. They are however not tilted upwards as much as on other planes. That’s why they are refered to as “raked wingtips”.
By: Jeanske_SN - 29th July 2004 at 22:27
Doesn’t it cause a bit of unbalance?
The 777 and 767-400ER’s wings are already so aerodynamical that they don’t need winglets.
By: tenthije - 29th July 2004 at 22:18
It’s quite common. I got a picture of a KLM 744ERF with one missing winglet. At LHR yesterday and today I saw a Air Jamaica with one winglet missing. I have not been able yet to compare registrations, but that probably was the same one as the plane pictured above at MAN.
By: bmi-star - 29th July 2004 at 16:05
Well, the picture’s at Manchester!
Oh aren’t u funny :rolleyes: lol
Thanks for the explanation
By: Skymonster - 29th July 2004 at 10:56
Some types are approved for normal operation with a single winglet (e.g. 747-400, A340) whilst others (e.g. 737G) are not. The winglets reduce the dynamic drag caused by vortices (sp?) curling round the wingtip and thus improve the aerodynamic efficiency of the airframe, which in turn reduces fuel burn. The differences in efficiency of each wing can be trimmed out on those types authorised to fly with only one winglet, but obviously its in the operators interest to replace the winglet soonest as it costs them a bob or two in additional fuel whilst a winglet is missing.
Andy
By: Ren Frew - 29th July 2004 at 10:32
They extend the length of the wing giving greater lift and therefore reduce fuel burn ( I think)? I also thought there were strict regluations concerning the use of planes with a missing winglet ?
By: Airline owner - 29th July 2004 at 09:36
i think winglets reduce drag and fuel costs
By: airband1 - 29th July 2004 at 09:11
If an aircraft can fly with only one winglet surely their just there for a cosmetic purpose or do they have some kind of important use that they really do need them
Thanks
By: Skymonster - 29th July 2004 at 09:00
Well, the picture’s at Manchester! 😉 But I presume that’s not what you wanted to know!!! :p
6Y-JMP hit (or was hit by) a United 777 at LHR a couple of weeks ago and the winglet was damaged and removed. Presume JM haven’t gotten a replacement yet.
A
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July 29, 2004 at 8:26 am