NASA Airliner Wing Vortice Tests

[victorkalbskopf]

everytime that big clock arm goes round 360° one second passes..

[SonicRyan]

cessna pilots beware!

[skunkertx]

I'm surprised big airports dont' have some kind of "wake turbulence" windsock to help detect these things. Anyways, the FAA concluded that it takes about 5-6 minutes for the wake turbulence to fully dissolve from a boeing jetliner. Smaller prop plane turbulance usually last around 30-2mins.

[acharyya22]

the trailing edge wingtip vortices have a small downward component called DOWNWASH.....the downwash induces a drag on the lifting wing.....so called INDUCED DRAG......

[acharyya22]

the trailing edge wingtip vortices has a small downward component called DOWNWASH.....the downwash induces the drag so called INDUCED DRAG.......on a lifting wing always....

[LTF85199]

How does the trailing wingtip vortex generates drag on an aircraft?

[jayeb1rd]

It changes the relative wind to a down and back condition. It comes from the high seeking the low on the top of the wing and strikes the top of the wing. This is why most airplanes have some sort of device on the wing tip to prevent the air from coming around..ie. winglets.

[stormthorgerson]

it doesnt necessarily generate drag, it has its effects on aircraft behind it. by reducing the wake turbulence you improve a lot of different things. when you see winglets, they reduce wake turbulence

[elementalpuck]

how much time actually elapses and what is the distance?

[c0011y5383]

yes I am an expert, you see there is little known about wingtip vortex because we cannot see it. so we dont realy know the true answear to this. But for example if i was flying behind in my small aircraft lets say my piper pa-38 tomahawk I want to be at least 3 minutes behind this larger aircraft. Id actualy want to give it greater distance if I could. And remain up wind of its flight path and shoot ahead of its landing point.

[Gregoru3746]

Huh, cool

[GeneralKenobiSIYE]

For a second there I thought my Media Player had somehow started playing on it's own. hahaha! Awesome!

[GeneralKenobiSIYE]

Hahahaha! Whats up with the Pink Floyd song? While I appreciate music from the best band ever, it was completely unexpected.

[r6speedcrazy]

i work near the airport and was lucky enough to experience it as i was walking to my car. i watched the plane fly past and about 10 seconds later u can sort of hear like a roar of the engines even tho the jet is long gone. and not long after that the vortex actually descended to the ground i was actually in the middle of it, felt pretty cool just like a lot of turbulent wind

[airlineman2606]

y does it happen after some time it should happen instant???

[4wheeldrifting]

because of the distance. The plane was some distance away from the tower during the pass. The vortex takes time to propagate outward from the plane and contact the tower. This is so they can isolate the vortex and not have other effects caused by the aircraft disturbing the smoke.

[hellosweda]

whats happening?

[tingudu]

heyaa..dis wing tip votices can b avoided by attaching wingels 2 t wings...t tornado kinda flow of dat air u saw can b reduced by dat..

[kartha789]

How long this will effect ??

[VORTlCE]

Beautiful.

[ccrossey]

U cant really see it good from this angle, but the aircraft is relatively far back from the tower, it gives the vortices time to build up. Wing tip vortices, as they travel back behind the aircraft increase in magnitude and velocity, until they inventually interact and decay via the crow instability, in which vortex rings form.

[snoopyloopy]

yeah they can effect planes of commercial jetliner proportions a good 5-6 miles away. and wasn't this identified as main culprit in jet that crashed in ny just after 9/11?

[amarpilot]

Correct, Also the pilot overcorrected snapping the rudder.

[Wacoswim]

That was just awesomeeee!

[digitalimpulse]

why did the swirl take so long? i dont understand that.

[orgaized4battle]

it's showing the dangers of landing a small craft to close behind something that big and how after that much time the air on the runway is still unstable from the plane that just landed. It's very dangerous to come in behind those big guys, even up to 60 seconds in some cases

[cokeyum]

for extreme cases, like a piper cub landing behind an A380, that can increase up to 20 minutes.

[dfwricardo]

thanks for the info!!!

[Mystery110]

The combination of each wing tip vortex grew larger and larger with the distance to eventually combine as one big vortex.

[Paethon]

wow

[Davidmac08]

That's really cool

[TheRedAngelz]

That is hella cool.

[putalalalberto]

u got that right

[pg1000000]

good tune..

[feynmanizma]

one more question; is it real time or slow motion? thank you..plane seems to pass very slow, that's why i think it may be slow motion, however the motion of the people at 0:34 suggests that it is real time...

[ATFSCrash]

It's real tine (or very close to it). The plane is flying slow to simulate landing speed. Each time the timer hand goes around is one second.

[feynmanizma]

what's this song?

[ATFSCrash]

The name of the song is called "Time" it's in the credits. I think it has another name, but I forget it. The artist is Pink Floyd. The tract can be found on the album dark side of the moon.

[feynmanizma]

thank ya! i found on youtube, it's really very nice song and also went with this vid..

[swah2]

Ingenius test! Those vortices are generated at the wing tip. It is due to the rolling of air from the lower portion of the wing to the upper. A vortex has three-dimensional structure (like a hurricane). It can stretch or compress. When it stretches (elongate), its radius decreases and tangential velocity increases (conservation of angular momentum). So does the other way around.

[GordonofSeattle]

Why does it take so long? i have always wonderd how this works. When I fly with my Grandpa up in Fairbanks We would some times hit wakes from air crafts that where not anywhere near us (nothing extreme) I have always wonder the cause of this. Anyone> In lamens terms please. Thank you

[ATFSCrash]

Vortex flow is essentially a flywheel. Since most of the air is essentially traveling in a circle there is not much loss of energy to friction, so the air can remain in motion for a rather impressive period of time.

As far as propagation, the propagation tends to be slow because most of the velocity is going in circles.

[GordonofSeattle]

I kind of get it. What do you mean by a flywheel? Thank you for awnering by the way.

[ATFSCrash]

GordonofSeattle: It would be like spinning up a bicycle wheel, (that would be a simple flywheel). After you spin up a bicycle wheel, it tends to keep on spinning for a while, though the energy is slowly converted to friction. It's like Newton's law, and object in motion wants to stay in motion. It's one of those conservation of energy laws of physics.

[GordonofSeattle]

Very good, that I can understand thank you very much

[A550RGY]

The next time someone says "FAKE", just ask them to provide proof and leave it at that. No more than 10 words, otherwise you look like silly for taking his "challenge", which was very likely in jest, so seriously.

[ATFSCrash]

A550RGY. I understand where you are coming from and sometimes I think that is an appropriate response. However sometimes I think it is more appropriate to point out that they hung themselves with their bigoted posts.

[ATFSCrash]

A550RGY. If I thought it was someone having a legitimate debate, I would've probably just asked him to support his claim, however since his he seems like an ignorant flamer, I decided in this case to point out that he is making a fool of himself, as a lesson to him and as an example to other flamers. ;)

[A550RGY]

I hear ya. Fair enough, ATFSCrash.

[frosty121278]

its still funny to hear the elaborate justifications and arguements levelled at that kid who said it was fake,(Including the money spent by NASA to create the video!) when the arguement seems so beneth the informed pilot ppl who are commenting, and either way will be over ridden if the kid ever comes back and says".... yeah? well your gay!... or whatever... air sucks! YOU GOT PWND!!"

[ATFSCrash]

frosty121278 "either way will be over ridden if the kid ever"

I disagree. Perhaps the individual was just a naïve person, in that case we gave him a dignified answer without sinking to his level of abuse. Judging by the language the individual was just a flamer, there's nothing like cool hard facts and logic given without responding in flame that discredits the flamer without giving the flamer the satisfaction of bringing us down to his level.

[ATFSCrash]

frosty121278 "either way will be over ridden if the kid ever" "YOU GOT PWND!"

I disagree. When you buy into the "you got pawned" aka "just kidding" excuse, you're just buying the con. A lot of these individuals are nothing but subversives trying to undermine the government, to support terrorism. A lot of these conspiracy theories are meant nothing more than to create delusional paranoia and distrust of the government.

[ATFSCrash]

The "you got pawned" excuse is often given when an individual realizes that their lies are not going to be believed by others and that the lies are exposing the individual as a fraud. It is also used by individuals that don't have the honor and balls to admit that they were wrong. The "you got pawned" aka "just kidding" excuse is just an immature copout by cowards that lack the bravery, maturity and honesty to admit when they are wrong.

[ATFSCrash]

The "just joking excuse" is just an attempt to back out of misconceptions or lies, while still trying to discredit the people that were right all along. However to people like me that don't buy into the con, it just shows that the flamer realized he was being discredited with their own lies, so they often try to play it off as a joke to try to use as damage control and as another attempt to flame.

[WashingtonXJ]

This is real, not fake like that kid said. Either way, for those of you who didnt know, wake vortices are created off all aircraft but especially those that are slow, heavy, and clean (no flaps). They rotate in a downward, outward motion from the aircrafts wings- this is why a plane can be seen flying by at an altitude of maybe 2000 feet and the vortices hit the ground about where the NASA test smoke was.

[TolgaSen27]

important

[ButteKhan]

Humm! ITS FAKE! look on the last part, stupid if u dont recognise

[ATFSCrash]

If you think it is a fake, make your argument. Why do you think it is fake? Explain your self, elaborate.

A lot of people would think your comment is "stupid" The vortex clip is a genuine NASA video.

The only thing that was added was sound and credits for the music. I used Pink Floyd to entertain and dramatize the amount of time that it took the vortex to reach the smoke and how long the vortex lasted.

[musicalaviator]

I'v seen wake turbulence myself. and heard it. and felt it while inside another aircraft. Often airports do fire tests, and on one occasion smoke drifted toward the threshold of a runway and ended up in a vortex like that. I'v even created wake turbulence I later flew through while doing steep turns in flight training. the bump you feel isn't unlike the effect in a boat hitting wake.

[musicalaviator]

ah, why did you reply to me saying that I thought it was fake? the entire point of my post was to point out that it wasn't fake. Where do you get the crazy Idea that I thought it was? I'v done steep turns and know that wake turbulence is real because I'v felt my own. Also the Fire Tests smoke point I made I pointed out the smoke makes similar patterns if a 747 goes overhead near the smoke. Your an idiot. Of course it isn't fake, and don't call me an idiot for thinking what Im not thinking.

[niflap]

I've witnessed the flow pattern of wtv's off my own wings when attacking rolls & streamers of toilet paper I threw out. In one of my near misses, the ribbon brushed off my wingtip, & I saw the tissue getting sucked in & curled up as it passed behind.

[wrh61]

Wind check ..? I think I'll let the heavy pass..

[DeskFlyer]

Cool!

[HRPuffinStuff]

Great video! Talk about an air disturbance :)

Would love to see how deep the vortice became.