B747 flutter

[chikles911]

guevos putos



[tubernation1]

Ladies & gentlemen, ummm, this is your captain speaking. If you will please look toward your windows and CLOSE the shades....

[poppopscarvinshop]

Tuck Your Head Between Your Legs and Kiss Your Ass Goodbye!

[k2477456]

*cue shitting of pants*

[k2477456]

* cue the super sonic 747*

[scotplane]

Why am I pissing my self laughing?!

[singningwongho]

holy crap haha

[Electrodudeify]

it ooks like the BOEING 747 is under water trying to swim... lolololol

[Electrodudeify]

The BOEING 747 under water...  lolololol

[Tjita1]

Do notice that it is staying together.

[gsmushman]

@Tjita1 Yes, but the structural integrity of the model says nothing of the structural integrity of the real aircraft.

[WorthWatchingVv]

lmfao that has got to be one of the silliest things I've seen.

[yeengineer1130]

hahhaha i remember my professor showed us this clip in class one time. Turns out that this this flutter problem was on the 747 in the early days of service. Engineers back then didn't truly understand it, so they just added more weight along some central axis on parts of the plane without any heavy number crunching. Well It turns out that it works, but we understand this phenomenon more today than back in the 70's.

[itsmonti1]

Doing the disco dance!!!!!

[itsmonti1]

The 747 thinks it's a fish!!!

[sAcRoSaNct17]

LOL, Airbus just got served.

[amk9998]

The bird is the word?

[maxime0999]

Surfing Bird !!!!!

[vroomba03]

DO THE WAVE!

[proanti1]

Of course its oversped at like 800 knots

[GunMan207]

@proanti1 THATS 920.62 MILES AN HOUR, THATS SUPERSONIC!!!!!!!

[jak9200]

@GunMan207 thanks for clarifying the obvious....

[ncn8ochaser]

I see you babyyyy! Shakin' that ass!!!! lmfao

[killersaad]

so this is how 747 swim

[john1966elliott]

Oh my God !!! Look like Jelly B747 !!! Huh?

[disgruntldtoad]

Shake that tail 747!

[spen224]

fuck me dam!!!! thats bad

[BuffaloWarrior7]

glad they fixed that...before full scale test

[LTF85199]

Why Swept wing on transonic planes (like 767,777 etc) instead of a wider and same camber tapered wing?

I know it is designed to increase critical Mach number. But Instead of sweeping the wings to achieve a thinner camber to chord ratio, why can't they just build a simple tapered wing with same camber with a higher width to achieve the same goal. By doing this you still have the same area and volume to fit fuel tanks and equipments right? would only loose lateral stability by doing this right?

[snedie69er]

I'm sure they had their reasons, after all they do spend millions $ desiging them lol

[rabidwombat211]

@LTF85199 You nailed it the first time. It is done to increase critical Mach number. It gets down to geometry basically but the higher sweep you have on the wing the higher the forward airspeed you can achieve with a lower airspeed vector going directly along the chord, thus increasing critical mach number. By using wider wings you lower your critical AOA, need increased strength, change the control forces required, etc etc

[GreenAce92]

lets hope we never see that on a commercial flight

[forces077]

how does this happen, what can be done to stop it?

[klykas]

Well usually it begins due to the exceeded critical speed at which the exciting frequency coincides with the natural frequency of the wing or tail. The flutter usually requires two degrees of freedom rotation and bending. At a certain speed vibrations are not damped and the amplitude increases thus breaking the plane or its parts. The appearance of the flutter depends on many factors, one of the major factors is the balance of the control surfaces and trim tabs.

[RAFfuturePilot09]

Happens a lot in gliding, basically reduce speed and pulling up stops it.

[s11033]

its doing the wave :)

[SmiertSpionem]

Someone needs to loop this with 'Twist and shout' :)

[TripleZ89]

While watching this video, listen to "I Like to Move It Move It" . It works so well! lol!

[biggyjurss12]

is that actually a boeing 747 or a sized down version?

[hotshot090]

It's a scale version about 6~8 ft in span. I'm also pretty sure this was done in the San Diego Wind Tunnel.

[kentacoma67]

They are scaled down, but they are built to the exact weight, size, wing length, and center of gravity as the actual airplane. The models are made mostly of balsa wood and fiberglass. The plane is actually flying in the tunnel, and it's only kept in place by a pole that keeps it from flying down the tunnel.

[drdan117]

imagine you're in that lololol

[weipeiwu2000]

SWIM! SWIM SWIM!

[addeffects]

@weipeiwu2000 hahaha

[sk8erboy6619]

wat migs said

[Migs4000]

if i on a plane doin that...id either laugh or shit myself...or both

[bobbyg1124]

They make those models to be able to bend like that because they cost hundreds of thousands of dollars and they can't afford to be building many of them.

[biggyjurss12]

or killing many people?

[horizonflyer9]

no they are flexible because when a plane flies, there is a ton of wind. the wind gives stress to the airframe. if the airframe were stiff, then the wind would cause it to break to pieces. But the flexible airframe helps it 'move with the wind'

[tommyeflight89]

Are you serious lol..?

[horizonflyer9]

yes i am very serious. why is it funny?

[bobbyg1124]

They make those models to be able to bend like that because they cost hundreds of thousands of dollars and they can't afford to be building many of them.

[Meuk1982]

I'm impressed, I knew it could handle a lot but this...

[mrjetdude]

wooo look at it dance lol!

[chris832]

mmm yes its like a fish in the sky

[FlyingGrimReaper]

man u didn't put the whole video, that test was to show how the rudder disintegrates afterwards. :(

[psvision]

oh i didn't know 747 does that! like some fish swimming! looks like it could take more stress than expected.