UAL747
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BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 10:10 am

Man, you guys take a look at the flex on these puppies. Talk about bending some metal. I haven't ever seen wings flex like this. Not even on the 777.


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UAL747
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vafi88
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 11:17 am

WOW!  Wow!
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da man
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 11:52 am

WOW! I wonder how much more bend before the wings would snap off is alloted for in the design of the B744?
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Mr.BA
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 12:16 pm

I would be interested to know how much more can the B744 wings bend too before they break off... anyone?

Nice pic Chris  Smile

alvin

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Pilot1113
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 12:20 pm

I believe that the 777 wings flexed 26 feet above the zero line.

In translation, they flexed up and over the plane before they snapped... exactly how the Boeing engineers designed them.

The 747 shouldn't be that different, meaning that the wings should flex a heck of a lot more than what's in the picture!

- Neil Harrsion
 
CcrlR
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 12:24 pm

there are a lot of pictures on here I seen that did that.
767-400
747-400
777-200
A340-300

But I just have to say just like everyone else WOW!!!!!!  Wow!  Wow!  Wow!  Wow!
"He was right, it is a screaming metal deathtrap!"-Cosmo (from the Fairly Oddparents)
 
AWspicious
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 12:38 pm

I'd like to know if someone here can explain what is the cause of this, please.
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SkyGuy11
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 12:41 pm

Proof of how friggin strong those planes are  Smile
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VapourTrails
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RE: Wings Flexing

Sun Jan 20, 2002 12:44 pm

From Australia. Qantas - Spirit of Australia.
 
Russianplnelvr
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 12:49 pm


The wings on the 747-400 can bend up to 29 feet.
 
spacecadet
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 3:59 pm

AWspicious: the cause is high G-forces; what else? The fuselage is being pulled down and the wings are trying to pull up. Why these planes got into these particular situations is anyone's guess; turbulence, control yoke inputs, etc. But the cause of the flex itself is high G-force.

I personally hate that "sinking" sensation you sometimes get in a plane, especially near the ground (I guess it's a form of turbulence); you often get wing flex in cases like that as the airflow over the wings first drops a bit and then recovers. But there have been very, very few accidents I can think of where high dynamic loads under normal circumstances (ie. not actually caused by some other event such as lightning strike or a bomb) actually snapped the wings off a plane. Maybe 2 or 3 times in the past 30 years. Those wings are extremely strong if maintained properly.
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Ikarus
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 7:33 pm

Spacecadet: I disagree - strongly. The planes in the pictures in this thread are not in any particularly high G-force situation. This is the normal wingloading: The fuselage has most of the weight, and the wings provide almost all of the lift. Hence the wings bend up under the load of the fuselage. I agree that the pictures are very good, but not very spectacular or unique on the amount of wing bending. They depict normal operations of 744s.

Regards

Ikarus
 
jasewgtn
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 8:15 pm

Is it me, or does the top BA photo look like a model on a blue background?!?!?
 
Joge
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 8:27 pm

Here you go (not as bad as in the 747):


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Photo © Jorgos Tsambikakis



-Joge
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B747-4U3
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RE: BA 744 Wings Flexing...WOW!

Sun Jan 20, 2002 11:36 pm

Jase, I agree with you, the first one does look as though it is a model. Nevertheless, it is a great photo.
 
SWA TPA
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 1:14 am

I thought it looked like a model too. Where is the rotating beacon? The sky is to uniformly blue. Something just doesnt look right.
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Ikarus
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 1:25 am

Hehehehehee. Whenever a photo is "too good to be true" some ..... individuals ... have to take it literally and hint that it might be fake - even if it is from one of the best and most well-known photographers of the site...

Funny.

Regards

Ikarus
 
da Fwog
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 7:06 am

Too good to be true? Hm. I picked that shot as the best from a sequence of 19 (!) I also considered masking the aircraft and using a little noise reduction on the sky, but decided against it as it looked too artificial. If you're really dubious, I could post a pic from earlier or later in the sequence....(which would doubtless be rejected as a dupe!)

Actually, I'm just trying to imaging what a nightmare it would be to photograph a model to look like that. For a start, how would I get the wings to flex like that? (the subject of this thread, after all!)

For those who are interested in the wing bending rather than the authenticity of the pic, the 747 was in a lefthand turn at the time. This obviously adds a component of centifugal force to the weight of the aircraft, thereby increasing the load on the wings and increasing the amount of flex.

Chris.
 
B747forlife
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 7:21 am

That's unnatural!

-Nick
 
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ATA L1011
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 7:35 am

Lots of pix of 747-400s,777's,767's and A330/40's with their wings flexing at various points. The alloys they use on the wings alloy this
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Jet-A gasguy
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 8:13 am

Another factor to consider, is that when there is a big cabin load and not much fuel, the wing bending moments increase dramatically. Could be the case in this photo.

just my 2 cents....

Jet-A gasguy
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voodoo
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 8:14 am

To those `model enthusiasts' who somehow doubt the BA 744 shot...I can easily vouch for Chris that that sight of a fully-laden 744 making a left turn against a sky like that is not uncommon at Heathrow, especially on a cold but sunny winter's day.
` Yeaah! Baade 152! Trabi of the Sky! '
 
SWA TPA
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 8:42 am

Ok then. BEAUTIFUL picture. I am only jealous that mine never come out that good  Smile
Not to mention I wish TPA had 747's to try with. I guess it would be rather hard to make a model with leading edges down and wing flexed!
Thats a compliment when your pic is so darn good people think its fake  Wow!
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EGGD
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 9:23 am

Jason Taperell is da masta...


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Photo © Jason Taperell




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Regards

Dan Big grin
 
zebfly2
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 11:52 am

Shame on those of you who think Chris' photo isn't real. Obviously you are not used to seeing a fully loaded 747-400 take off. Whenever I go back to my hometown of NYC, I make it a point to go to Rockaway Beach(near JFK) in the late mornings just to watch Asia bound 747's(NW,JAL,ANA,KOREAN,& UA) t/o. The flex on the wings is an amazing sight. The flex on a fully loaded A340 isn't too shabby either. Keep up the good work Chris! Big thumbs up
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Mr.BA
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 4:33 pm

Yeah I agree. If you have a chance, look carefully at a fully loaded B747-400 rotate, the wings really flex a lot more than usual!

alvin
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ZK-NBT
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 5:22 pm

Great photo!!! Great Plane!!! I always love watching fully loaded 747's take off it's really a beautiful sight!  Smile
 
Guest

RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 6:12 pm

I agree the BA 744 looks spectacular from that angle but as many posters have stated here it's just sort of natural (high aspect ratio wings + huge span + flexible material) .
Just look how long the B52's have been around.Now did these BUFF's ever exp.any incident related to their highly flexing wings ? I haven't heard about any,correct me if I ' m wrong.
 
VS744
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 6:27 pm

It looks even stranger when your inside one.

I noticed this on a VS 744 last year. When we were on te ground, I could clearly see the winglet, however when we got into the air, the winglet had raised by about 10 feet, and I couldnt see it without leaning really low down (I was in 48G). When we landed, the wing (from the engine onwards) dropped again....really strange I thought!
 
da Fwog
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 6:42 pm

Well, the difference between on the ground and in the air is made even greater by the fuel in the wings. When fully fuelled, the wings of a 747 on the ground droop down slightly. What with the angle of the winglets on the 744, this actually serves to increase the wingspan slightly! (a fully fuelled 744 is therefore wider than an empty one) I've just had a look for a shot that demonstrates the effect, and here on this 744 taxying out and fuelled up, you can clearly see the way the wing has a definite convex curve to it:

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Photo © Chris Sheldon

 
Shroom952
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 7:31 pm

When I lived in Houston(IAH) I went on a trip to London Gatwick...and I flew British Airway's 744. It was a non-stop flight so it was pretty fueled up! And we took off and i've never seen so much wing flex, looked somewhat like that depicted in the picture. Also I flew Continental's 767-400 out of LAX to Honolulu...and I was siting right over the wing. Now this is the 2nd time i've flown on a plane, so I'm not sure if this is normal..but when I looked straight out...i couldn't see anything...all I saw was a wing...we were at crusing alt as well...not decending...just level. So I thought that was pretty cool. Kinda got amused looking at the wing..and the rivets etc and the flaps, for about 2 hours hehe. Interesting stuff! Thanks for the pictures.

Aloha
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BA777
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RE: BA 744 Wings Flexing...WOW!

Mon Jan 21, 2002 9:01 pm

Check this one out then  Wink/being sarcastic


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KingWide
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RE: BA 744 Wings Flexing...WOW!

Tue Jan 22, 2002 6:04 am

A head-on shot better illustrating [IMHO] what Chris is talking about with the convex curve of the wings when fully fuelled.


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J
Jason Taperell - AirTeamImages
 
EGGD
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RE: BA 744 Wings Flexing...WOW!

Tue Jan 22, 2002 6:14 am

........plugathon
 
Mr.BA
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RE: BA 744 Wings Flexing...WOW!

Tue Jan 22, 2002 7:31 am

One interesting information for those who are not aware of this. Just thought of sharing it with you. An empty B747-400 wing has a wingspan of 64.4m but when it is full fueled, it will have a wingspan on 64.9m.
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Red Panda
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RE: BA 744 Wings Flexing...WOW!

Tue Jan 22, 2002 10:03 am

For those who wanna know about wing-flexibility diff. btwn 747 and 777:

777 has much more flex wings than 747. b777 wings are made of more flexible, 1/3 lighter, and stronger materials than those made the 747 wings.

my 0.02
r panda
 
UAL747
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RE: BA 744 Wings Flexing...WOW!

Tue Jan 22, 2002 11:17 am

Not to mention that this flexing is greatly enhanced by the 777's greatly upward swept wings. It's an awesome sight and more pronounced if you are sitting at the rear of economy.

UAL747
"Bangkok Tower, United 890 Heavy. Bangkok Tower, United 890 Heavy.....Okay, fine, we'll just turn 190 and Visual Our Way
 
Guest

RE: BA 744 Wings Flexing...WOW!

Tue Jan 22, 2002 12:51 pm


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baec777
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RE: BA 744 Wings Flexing...WOW!

Tue Jan 22, 2002 2:10 pm

Boeing 777s has them flex wings too...
MS777(Egypt Air)
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NG777(Lauda Air)
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Photo © Peter Unmuth - Vienna Aviation Photography

JL777(Japan Airline)
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BA777
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RE: BA 744 Wings Flexing...WOW!

Thu Jan 24, 2002 2:42 am

So do 767's  Wink/being sarcastic


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standby87
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RE: BA 744 Wings Flexing...WOW!

Thu Jan 24, 2002 3:03 am

Yep, the flex on 744s is impressive. When BA introduced them in '89, I was sat about Row 43/44 on my first flight and was amazed to watch the wing-tip shoot upwards on take-off and come back down into view smartly on touchdown.