Mason
Topic Author
Posts: 636
Joined: Sat Jun 12, 1999 12:01 am

UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 3:10 pm

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

 
Guest

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 3:15 pm

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
 
Guest

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 3:19 pm

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
 
Guest

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 3:23 pm

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 )
 
CPDC10-30
Posts: 4681
Joined: Wed Feb 02, 2000 4:30 pm

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 3:25 pm

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.
 
Big777jet
Posts: 2682
Joined: Mon May 01, 2000 10:52 am

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 3:55 pm

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

 
hkgspotter1
Posts: 5750
Joined: Fri Nov 04, 2005 12:43 pm

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 4:09 pm

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.
 
Guest

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 6:27 pm

HKGSpotter1,

Is it possible???

Regds,

Alvin
 
airmale
Posts: 7125
Joined: Fri Sep 17, 2004 4:48 pm

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 7:55 pm

wow what a revelation, so those ugly winglets on all a/c these days are just a sales gimmik 
.....up there with the best!
 
CPDC10-30
Posts: 4681
Joined: Wed Feb 02, 2000 4:30 pm

RE: UA 747-400 With Missing Winglet!

Fri Nov 10, 2000 10:45 pm

HKG spotter, not all DC-10 have centre gear...only the 10-30ER models. Not sure about the A340 though.
 
N503JB
Posts: 291
Joined: Sat May 13, 2000 3:49 am

RE: UA 747-400 With Missing Winglet!

Sat Nov 11, 2000 12:46 am

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
 
Red Panda
Posts: 1433
Joined: Wed Jun 14, 2000 12:58 pm

RE: Hkgspotter1

Sat Nov 11, 2000 1:52 am

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.
 
777kicksass
Posts: 648
Joined: Thu Sep 07, 2000 9:52 pm

RE: Hkgspotter1

Sat Nov 11, 2000 2:29 am

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?

 
LH423
Posts: 5868
Joined: Sun Jul 11, 1999 6:27 am

RE: UA 767-300 In Cathay 744 Pic

Sat Nov 11, 2000 2:48 am

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
 
imkeww
Posts: 676
Joined: Sat Apr 28, 2001 1:48 am

RE: UA 747-400 With Missing Winglet!

Sat Nov 11, 2000 2:55 am

When United initially flew HKG-DEL, they used a 763.
 
Mason
Topic Author
Posts: 636
Joined: Sat Jun 12, 1999 12:01 am

RE: UA 747-400 With Missing Winglet!

Sat Nov 11, 2000 3:23 am

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.
 
LH423
Posts: 5868
Joined: Sun Jul 11, 1999 6:27 am

RE: UA 747-400 With Missing Winglet!

Sat Nov 11, 2000 4:36 am

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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