My goodness.. I've not seen so much wing flex in a long time. Soon after take-off the engine furthest away was truly wobbling, lol. However, for all the amazement, have to say that I love it. I always love watching the wing activity on a plane and it makes flying so much more 'real'. Aircraft engineering always fascinates me, starting with the fact that such a huge and heavy metal machine such as the B747 series (my favourite, even more than the A380) can lift off, fly and land so gracefully.
I've watched this video countless times and it remains my favorite takeoff vid. There is clear, visible evidence of several of the physical forces at play during the takeoff and climb-out phases of commercial flight. I think it's a great testament to the engineering that went into the 747-400. Plus the sound is very good. Love it!
Watch closely at 0:52 and 0:57 as the engines start to rise and the wing (also at 0:57) when the plane is holding. The pilot has the brakes on full and the engines at max!. This flight was fully loaded + cargo. You can tell the weight by the bounce that she takes at 1:30 as the wings are starting to flex up and down. They make teh plane jump a bit before the nose even starts to rise. THAT EQUALS A VERY HEAVY LOAD.. Great video and NICE camera work!
Awesome video. Great sound and great view. I love the 747-400. I rode one from Mumbai to Frankfurt the other week and enjoyed every second of the trip.
this is the best vid n youtube that i have seen to do with 747 takeoffs! Magnificent aircraft performing superiorly well! The camera was well positioned and all! AWESOME! 5 STARS!
Really flexible wings, looks like they were very heavy with fuel and those engines seemed as if they were going to take off on their own and leave the plane behind. AWESOME!
Hi! I don't know if there's some videos about, but it's also very impresive the flexing capability of a B-52 bomber wing. An old 50 years (or more?) design, you know. The 52's wings are very high located, and are so flexible that they need supports at its extremes, on ground.
Simply amazing! It seemed like an unusually long time before the Krueger Flaps (and also presumably the trailing-edge flaps, although they weren't visible in the video) were retracted.
Very cool! 5* Can you imagine what a first time flyer would think of that wing flex. They'd think the wing would come of. The wing flex on a A330 is amazing too. I remember flying on Aer Lingus A330 to Malaga
the flex in those wings in unbelievable! yeah, i know they are designed to bow quite a lot, but........watching this makes me shiver! awesome nonetheless!
No, I understand that. I was answering the question about what gas was in the jet. Jetfuel is kerosene. But you are correct, that is condensation in the engines. I believe that it occurs when the temperature inside the engine is either cooler or hotter than the temperature outside and it also occurs in moist conditions as you said.
I know wings are supposed to flex but I was stunned at how much the #4 engine wobbles. If that's what she's built to withstand, what a magnificient piece of engineering.
Great vid. Flaps/slats are brought in on 'schedule'. It seems obvious the plane was very heavy as the takeoff roll was long. after the initial climb it was probably accelerating fairly slowly, so it took some time between flap retraction steps. the main flaps would have been retracting during the climb but you can't see them. the Slats are the last to come in.
yeah, maybe he WAS actually talking about the aileron's and then Spoilers kicking in a bit, as the pilot rolls the yoke beyond a certain Degree. true. that's exactly what happens: when a certain "angle" of Roll is input at the control column, the Roll Spoilers ( Boards" as they're also called) pop up a little to Assist the Aileron's in effecting the Turn. What I was referring to, or thought he might have been talking about, were those LED's extended off the Leading Edge's. cool.
It's used as stability for the aircraft. At the speeds a plane is moving, the wings need to flex in order follow the patterns of the wind and keep the airplane from rolling in level flight. It's a very important part of the structure, because if the wings didn't flex and was fixed, the wind would cause the entire plane to move unpredictably and this would even cause fracture, which we don't want! :P
it is amaizing how the wing doesn't break out there cause it was moving up and down very hard with the engines and nothing happened and those engines are very heavy it is just amaizin what the man has created.
Hi, it's not smoke, it's humidity. When the air is sucked into the engine, it accelerates very rapidly, causing its pressure and thus its temperature to drop dramatically, and this, in turn, causes the moisture the air contains to precipitate and become visible. this normally happens during takeoffs in hot and/or humid environment.
Haha yeah the flexing is normal.. in aerospace engineering we study it as a phenomenon called aeroelasticity.. to put it in perspective, the forces acting on the wing are greater than the weight of the airplane thats why its lifting off the ground, and all that force (we're talking over 400,000 lbs on each wing) causes the wing to bend upward. In addition since the flow field around the wing keeps changing the pressure distribution keeps changing so its flutters.
@futurer90 My *personal* feeling is: The bigger the plane, the smoother and quieter (and thus, more boring) takeoff and landing are. A 747 accelerates slower and more gradual than a smaller plane, thus you get less strongly pressed into the seat.
The lift off speed is dependant upon the weight of the aircraft. The heavier the aircraft the higher the speed. At maximum take off weight of 875,000 lbs (396,890 kgs) Vr (rotation speed) will be about 175 knots and V2 about 185 knots.
I'm used to being on half-loaded 737-700's bouncing out of Manchester. I'd find that long takeoff roll to be a little nerve racking. Now I'll know what to expect when I fly the jumbos.
Don't worry about the wing flex. What you should be worried is that if the wings WEREN'T flexing, then you should be scared. Wing flex is the most graceful and beautiful part of commercial flying!
@HansensUniverse Thats the beauty of flying is wing flex. Just think of a diving board as it flexes when someone jumps off, the same applies to wings. They must be flexible to take on turbulence or if not, it'd break under pressure.
They are designed to bend more than that due to turbulence take off. Wings are designed to flex... if they do not flex they may snap like chopsticks. The pilot trust up first before releasing the brakes as you can see the engines pushes upwards as they spooled. What an beautiful and incredible piece of machines ever made by humans.
@drumdude46 hi my friend i am agree with you , but the name of this devices are ,,,, krueger flaps , the purpose of it , is to direct the airflow over the wing in low speed-high attack angle (take off - landing) to avoid a STALL by cutting off the airflow
@dtangle am agree with you , but a think the bolt failled cause a non certificated install precedure or corrossion you know , i wish some day to see a wing being attached to a wing center box , i want to know how they do it
FruityLoosas, the wings are designed with a certain amount of flex in them. If wings were designed (and they could be) to be completely rigid, then they would snap under harsh landings, or extreme turbulence. The end of the wings are designed to flex upwards up to several meters without failing. The result of this is the "shaking" you see.
My goodness.. I've not seen so much wing flex in a long time. Soon after take-off the engine furthest away was truly wobbling, lol. However, for all the amazement, have to say that I love it. I always love watching the wing activity on a plane and it makes flying so much more 'real'. Aircraft engineering always fascinates me, starting with the fact that such a huge and heavy metal machine such as the B747 series (my favourite, even more than the A380) can lift off, fly and land so gracefully.
That's amazing how much that wing bends and flexes, and that engine sound at 2:37 is amazing!
I've watched this video countless times and it remains my favorite takeoff vid. There is clear, visible evidence of several of the physical forces at play during the takeoff and climb-out phases of commercial flight. I think it's a great testament to the engineering that went into the 747-400. Plus the sound is very good. Love it!
Some of the best American Engineering ever! Great Plane! So glad that I was able to fly it once in my life!
Watch closely at 0:52 and 0:57 as the engines start to rise and the wing (also at 0:57) when the plane is holding. The pilot has the brakes on full and the engines at max!. This flight was fully loaded + cargo. You can tell the weight by the bounce that she takes at 1:30 as the wings are starting to flex up and down. They make teh plane jump a bit before the nose even starts to rise. THAT EQUALS A VERY HEAVY LOAD.. Great video and NICE camera work!
The best takeoff video I have ever heard! Love the sound of the engines when they spool up!
watching this makes my stomach churn. ive never seen a wing flex and shake so much!!! awesome!
This is a high quality clip and excellent as well. i too love the way the engines wobble slightly and the wing flexes, but shows their robust.
You can hear the overhead bins creaking on takeoff. Sounds exactly like the ones on the All Nippon 747-400 I flew on. Beautiful vid.
wow amazing video,the smoke in the engines ,the movement off the wing and engines ,the flaps? going in!
i love that feeling you get when you start to go faster and faster on a plane during takeoff :)
Wow... 1:40 to 1.55 is absolutely scary to watch... a bumpy start to the journey from the looks of it...lovely video. Thanks.
Wonderful departure. A bit of turbulence... Love the wing and engine flexing...
damn awesome wing flexing. love it. You would be amazed to see how far these wings can flex man. Truly amazing
wow, i never seen such a steady clear video of all that wing+engine movement great shot -Hackie
Awesome video. Great sound and great view. I love the 747-400. I rode one from Mumbai to Frankfurt the other week and enjoyed every second of the trip.
Wow its incredible how much the wings flex and engines wobble. They look like they will just snap off. Scary.
this is the best vid n youtube that i have seen to do with 747 takeoffs! Magnificent aircraft performing superiorly well! The camera was well positioned and all! AWESOME! 5 STARS!
I think this is one of the best 747´s take-off videos on youtube..if not the best one..amazing :))
This is my favorite take off.
We can see how flexive the wing can be.
Beautiful footage of awesome engineering at work.
Exellent job showing that massive wing flex!
Excellent! I can replay this video again and again!
Awesome footage of the vapor in the engines on the take off roll
Really flexible wings, looks like they were very heavy with fuel and those engines seemed as if they were going to take off on their own and leave the plane behind. AWESOME!
I love the engine sound too
That's an awesome angle. I never knew the wings flexed like that.
You can see the wing bump up and dow under the take off. Really cool!
The flexing makes the ride more comfortable for the passengers and causes less stress on the plane structure as you mention in your post.
It's so impressive to see the wing flex on the 747.. looks like it's all about to fall off :)
has all the factors of a good takeoff video,sound,wingflex,engines fogging up,etc.
Hi!
I don't know if there's some videos about, but it's also very impresive the flexing capability of a B-52 bomber wing. An old 50 years (or more?) design, you know.
The 52's wings are very high located, and are so flexible that they need supports at its extremes, on ground.
I love watching that aileron working away like crazy out there.
Simply amazing! It seemed like an unusually long time before the Krueger Flaps (and also presumably the trailing-edge flaps, although they weren't visible in the video) were retracted.
Very cool! 5*
Can you imagine what a first time flyer would think of that wing flex. They'd think the wing would come of. The wing flex on a A330 is amazing too. I remember flying on Aer Lingus A330 to Malaga
I've never seen that much flex of the wing...wow!
It is amazing how flying to this day leaves most people breathless with excitement
the flex in those wings in unbelievable! yeah, i know they are designed to bow quite a lot, but........watching this makes me shiver! awesome nonetheless!
great vid, love how you keep the camera still for the whole footage
this comment is older than most kids who play fortnite
wonder if anyone is on this account
Those flaps "Krüger" ara beautiful!
Happy Landings!
No, I understand that. I was answering the question about what gas was in the jet. Jetfuel is kerosene. But you are correct, that is condensation in the engines. I believe that it occurs when the temperature inside the engine is either cooler or hotter than the temperature outside and it also occurs in moist conditions as you said.
What a spectacular takeoff!! do I really love the sound of those engines!!!!
I know wings are supposed to flex but I was stunned at how much the #4 engine wobbles. If that's what she's built to withstand, what a magnificient piece of engineering.
Great vid. Flaps/slats are brought in on 'schedule'. It seems obvious the plane was very heavy as the takeoff roll was long. after the initial climb it was probably accelerating fairly slowly, so it took some time between flap retraction steps. the main flaps would have been retracting during the climb but you can't see them. the Slats are the last to come in.
yes it does but the checkerboard approach was one of a kind. Both airports are great!
Great Wing flex...its good to see the design specifications in action..almost looks like its flaping
Beautiful departure sequence! Felt like I was there! Thanks for YT'ing this-
nn
Just FYI, those "twisting" motion prevents the wing from breaking and vibration, it is designed to be like that.
yeah, maybe he WAS actually talking about the aileron's and then Spoilers kicking in a bit, as the pilot rolls the yoke beyond a certain Degree. true. that's exactly what happens: when a certain "angle" of Roll is input at the control column, the Roll Spoilers ( Boards" as they're also called) pop up a little to Assist the Aileron's in effecting the Turn. What I was referring to, or thought he might have been talking about, were those LED's extended off the Leading Edge's. cool.
nice vid love watching the wing flex!
OH WOW! That is some AWESOME wing flex right there!
Awesome takeoff! And what a wingflex! Great! :)
love the shot of the slats at the start or the vid, amazing
One of my best flights was on a Lufthansa 747-400 (D-ABTB) from Seoul Incheon to Frankfurt. The 747s are great and still a wonderful airplane to fly.
Brilliant. All those 747's on the ground as well.
It's used as stability for the aircraft. At the speeds a plane is moving, the wings need to flex in order follow the patterns of the wind and keep the airplane from rolling in level flight. It's a very important part of the structure, because if the wings didn't flex and was fixed, the wind would cause the entire plane to move unpredictably and this would even cause fracture, which we don't want! :P
Amazing Engine Sound
it is amaizing how the wing doesn't break out there cause it was moving up and down very hard with the engines and nothing happened and those engines are very heavy it is just amaizin what the man has created.
Hi, it's not smoke, it's humidity. When the air is sucked into the engine, it accelerates very rapidly, causing its pressure and thus its temperature to drop dramatically, and this, in turn, causes the moisture the air contains to precipitate and become visible. this normally happens during takeoffs in hot and/or humid environment.
i love how the engines tense up the airframe when it spools all the way up!
Oh my god! That wing shakes like crazy!
Those GE CF6 80E's are so sexy, the spool sounds amazing! AWESOME VIDEO!
Haha yeah the flexing is normal.. in aerospace engineering we study it as a phenomenon called aeroelasticity.. to put it in perspective, the forces acting on the wing are greater than the weight of the airplane thats why its lifting off the ground, and all that force (we're talking over 400,000 lbs on each wing) causes the wing to bend upward. In addition since the flow field around the wing keeps changing the pressure distribution keeps changing so its flutters.
Simply beautiful. What a beast!
pretty cool stuff.... all way to flaps and leading-edge slats retracted, flying in the clean configuration.
Incredible video. Kind of a scary takeoff. Lots of turbulence. Great video.
@futurer90 My *personal* feeling is: The bigger the plane, the smoother and quieter (and thus, more boring) takeoff and landing are. A 747 accelerates slower and more gradual than a smaller plane, thus you get less strongly pressed into the seat.
The lift off speed is dependant upon the weight of the aircraft. The heavier the aircraft the higher the speed. At maximum take off weight of 875,000 lbs (396,890 kgs) Vr (rotation speed) will be about 175 knots and V2 about 185 knots.
That was a heavy birb.
fantastic...damn that wing does flex...bloody awesome....
Excellent video! Its nice to know that LH will be the launch costomer for the new 747-8....the only airline that has ordered it. lol (at least so far)
@drumdude46 Or simply slats, they extend when the flaps lever is in the position 1.
You're 100% right. You may hear of a plane crash about every other month or so, but 1,000s of planes take off and land safely every day.
also the flexing makes the ride for the passengers a lot more comfortable.!!
The wing tips can flex 16 ft, before they go SNAP lol, nice so hear the climb power, then reduce to cruise, love the RR trent engines
THOSE WINGS ARE GOING TO SNAP OFF!!
I'm used to being on half-loaded 737-700's bouncing out of Manchester. I'd find that long takeoff roll to be a little nerve racking. Now I'll know what to expect when I fly the jumbos.
@mitchlin71 they're called slats and they increase the curvature of the wing, like the flaps do (in the back). This generates more lift.
I love those lufthansa 747-400s!!!!
Don't worry about the wing flex. What you should be worried is that if the wings WEREN'T flexing, then you should be scared. Wing flex is the most graceful and beautiful part of commercial flying!
Love the engine sound at around the 0:50 mark.
This video flew right into my favourites!
yes, that's what I saw the first time I flew in one of these. The wings must be extremely flexible to bear the pressure and size
@LTV249 Love the way the wings & engines flex. Boeing was a master a that.
@HansensUniverse Thats the beauty of flying is wing flex. Just think of a diving board as it flexes when someone jumps off, the same applies to wings. They must be flexible to take on turbulence or if not, it'd break under pressure.
One of the best Video`s on you tube!!
@porsche187 A 747 wings are can flex 26 feet in either direction before they fail, it looks worse because of the movement of the outboard engine.
Beautiful!!!
I'd say more like terrifying wing flex. Looks as though the damn engines are a second from falling off.
They are designed to bend more than that due to turbulence take off. Wings are designed to flex... if they do not flex they may snap like chopsticks. The pilot trust up first before releasing the brakes as you can see the engines pushes upwards as they spooled. What an beautiful and incredible piece of machines ever made by humans.
I love the engine sound!
@drumdude46 hi my friend i am agree with you , but the name of this devices are ,,,, krueger flaps , the purpose of it , is to direct the airflow over the wing in low speed-high attack angle (take off - landing) to avoid a STALL by cutting off the airflow
Damn, that was a turbulent takeoff, look at those engines bouncing around!
@dtangle am agree with you , but a think the bolt failled cause a non certificated install precedure or corrossion
you know , i wish some day to see a wing being attached to a wing center box , i want to know how they do it
i love hong kong because of its hills and mountains!!
@hayvant the wing flexes so it doesnt snap under the pressrue and weight
FruityLoosas, the wings are designed with a certain amount of flex in them. If wings were designed (and they could be) to be completely rigid, then they would snap under harsh landings, or extreme turbulence. The end of the wings are designed to flex upwards up to several meters without failing. The result of this is the "shaking" you see.
The first lady of the civil jets - with her unimitable sound...!
@Chrispy854 The wing is designed to flex, and it can safely flex quite a bit more than that.
wow! Wingflex on tht!! Engines look as light as a fether :D