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UA 747-400 With Missing Winglet!  
User currently offlineMason From United States of America, joined Jun 1999, 748 posts, RR: 1
Posted (13 years 11 months 2 weeks 4 days 7 hours ago) and read 2980 times:

Ok, mabye I am blind, but I don't see a winglet on the left side of this aircraft. Apparently the photographer doesn't either. What is going on? Thanks in advance.

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Photo © Christopher Smay



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Photo © Christopher Smay



16 replies: All unread, jump to last
 
User currently offlineIainhol From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 11 months 2 weeks 4 days 7 hours ago) and read 2911 times:

They did flight test to see the difference performance, one source told me they make no difference but another one told me only the really long haul they help a little. That is why on the D models they do not have any!
Iain


User currently offlineIainhol From , joined Dec 1969, posts, RR:
Reply 2, posted (13 years 11 months 2 weeks 4 days 6 hours ago) and read 2863 times:

After reviewing both photo's it is only missing one winglet, I doubt that one winglet makes much different. BA or some one else lost one a while ago! Maybe it got banged in the hanger so it was easier to take it off!
Iain


User currently offlineYaki1 From , joined Dec 1969, posts, RR:
Reply 3, posted (13 years 11 months 2 weeks 4 days 6 hours ago) and read 2842 times:

Could have been damaged and is removed per a dispatch deviation guide or configuration deviation guide. Each airline has its own rules and policies which are FAA approved. Or it could be on a special ferry permit under part 91 ( not carrying paxs )

User currently offlineCPDC10-30 From United Kingdom, joined Feb 2000, 4791 posts, RR: 23
Reply 4, posted (13 years 11 months 2 weeks 4 days 6 hours ago) and read 2831 times:

I remember reading about a year ago here that it was done as an experiment by United...no more and no less. They found practically no difference with or without the winglet. Remember, the 747-400SR (or Domestic) doesn't have winglets either.

User currently offlineBig777jet From , joined Dec 1969, posts, RR:
Reply 5, posted (13 years 11 months 2 weeks 4 days 6 hours ago) and read 2803 times:

I hope not to hear what if passenger is on board. If he looks out window left side wing is flat and walk around to look at right wing it came with winglet. He would be SCREAMING!!! what do you think? haha I think it is not missing winglet by now. Probably, it back on it both winglet. It is rarely to see this plane one with and one without . Strange looking huh?

Big777jet



User currently offlineHkgspotter1 From Hong Kong, joined Nov 2005, 0 posts, RR: 0
Reply 6, posted (13 years 11 months 2 weeks 4 days 6 hours ago) and read 2795 times:

It must have been damaged.

I've seen a LH 744 and a CX A333 in service with only one winglet.

On another topic I've seen a CX A342and a A343 operating with no centre gear !!, and a GA DC-10 with no centre gear.


User currently offlineMr.SQ From , joined Dec 1969, posts, RR:
Reply 7, posted (13 years 11 months 2 weeks 4 days 3 hours ago) and read 2761 times:

HKGSpotter1,

Is it possible???

Regds,

Alvin


User currently offlineAirmale From Botswana, joined Sep 2004, 379 posts, RR: 1
Reply 8, posted (13 years 11 months 2 weeks 4 days 2 hours ago) and read 2741 times:

wow what a revelation, so those ugly winglets on all a/c these days are just a sales gimmik 


.....up there with the best!
User currently offlineCPDC10-30 From United Kingdom, joined Feb 2000, 4791 posts, RR: 23
Reply 9, posted (13 years 11 months 2 weeks 3 days 23 hours ago) and read 2715 times:

HKG spotter, not all DC-10 have centre gear...only the 10-30ER models. Not sure about the A340 though.

User currently offlineN503JB From Hong Kong, joined May 2000, 303 posts, RR: 2
Reply 10, posted (13 years 11 months 2 weeks 3 days 21 hours ago) and read 2691 times:

Please take a look on my photo, which took in Kai Tak of the CX B744 without left winglet.


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Photo © Ryan Chow




HKIA Ramp Spotters
User currently offlineRed Panda From Hong Kong, joined Jun 2000, 1521 posts, RR: 0
Reply 11, posted (13 years 11 months 2 weeks 3 days 20 hours ago) and read 2670 times:

Are you sure that CX operate A34 w/o the center gear? Sometimes it's very easy to miss the center gear if you look from the bottom of an a/c. Anyhow, the center gear on A40 is just for auxilary when landing. I believe it can land w/o the center gear too. But I've never seen any a/c w/ only one winglet on!!!! Thanks for all the great photos.

User currently offline777kicksass From United Kingdom, joined Sep 2000, 668 posts, RR: 0
Reply 12, posted (13 years 11 months 2 weeks 3 days 19 hours ago) and read 2648 times:

Aren't the centre gears just their to spread the a/cs weight, so that it can operate on smaller airfields, which have load limits on the runway?



User currently offlineLH423 From Canada, joined Jul 1999, 6501 posts, RR: 54
Reply 13, posted (13 years 11 months 2 weeks 3 days 19 hours ago) and read 2637 times:

Can anyone tell me why there is a United 767-300 in the background of the Cathay 744 shot. Does (did) UA use the 767 on an NRT-HNG route? Do they still? Thank you for any information.

LH423



« On ne voit bien qu'avec le cœur. L'essentiel est invisible pour les yeux » Antoine de Saint-Exupéry
User currently offlineImkeww From , joined Dec 1969, posts, RR:
Reply 14, posted (13 years 11 months 2 weeks 3 days 19 hours ago) and read 2633 times:

When United initially flew HKG-DEL, they used a 763.

User currently offlineMason From United States of America, joined Jun 1999, 748 posts, RR: 1
Reply 15, posted (13 years 11 months 2 weeks 3 days 18 hours ago) and read 2621 times:

In regards to the issue of whether or not winglets help on long-haul flights, please view the numerous threads in this forum. They do help, but only on longer flights, which is why the 747-400D does not have them. They actually produce a slight amount of thrust, netting an increased range due to fuel savings.

User currently offlineLH423 From Canada, joined Jul 1999, 6501 posts, RR: 54
Reply 16, posted (13 years 11 months 2 weeks 3 days 17 hours ago) and read 2602 times:

The centre bogey on certain airplanes, like the A340, MD-11, and 747, are to more evenly distribute weight over the the taxiway/runway.

The heavier the plane, the more weight is concetrated on certain points, so to prevent the aprons, and taxiways from cracking under the immense pressure is to add more bogies, ie more wheels, to distribute the weight.


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Photo © Ville Tuomi




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Photo © Felix Sieder




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Photo © Paul Arnold



Think about some of those idiots that make a living by laying down on nails. They can lay down on nails because their body weight is distributed over hundreds, if not thousands of nails, therefore each nail holds enough weight as to not puncture the skin. Compare that to sitting on a tack...ouch. All your boby weight is centred on one (very sharp) point.

However not all planes use centre bogies to distribute weight: Case in point, the Antonov An-124.


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Photo © Rico Suave Chavez



LH423



« On ne voit bien qu'avec le cœur. L'essentiel est invisible pour les yeux » Antoine de Saint-Exupéry
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