1. Balance

    Balance Senior Member

    This video has been shared on social media and retitled as "pilot forgetting to turn off the chemtrails".
    Original video description from MrJI12
    [Admin update: It's an aerodynamic contrail from the wing surface and in the wake vortices, due to the high humidity - as seen by the fog]

    Wikipedia Explains:
    https://en.wikipedia.org/wiki/Contrail#Condensation_from_decreases_in_pressure
    Here's almost the exact same shot in the daytime (from the famous In-n-Out spot at Lincoln and Sepulveda]


    More examples:

    Steve Morris has a great collection of photos of similar events, with dramatic lighting:
    https://www.flickr.com/photos/16699423@N02/sets/72157627508873002/
    [​IMG]
    [​IMG]

    https://www.alpa.org/portals/alpa/magazine/2007/May2007_WakeTurbulenceThreat.pdf
    [​IMG]

    http://www.airliners.net/photo/Qantas/Boeing-737-476/0887624/L/
    [​IMG]

    http://www.owenzupp.com/_blog/Owen_...Down!_An_Aviation_Image_by_Andrew_McLaughlin/
    [​IMG]

    http://www.airliners.net/photo/Boeing-757-2.../0060641/
    [​IMG]

    http://www.airliners.net/photo/Lufthansa-Cargo/McDonnell-Douglas-MD-11(F)/2017937/M/
    [​IMG]


    And a great compilation:


    The original video comes from MrJI12, who has a great collection of similar videos, mostly taken from the same spot:
    https://www.youtube.com/user/MrJI12/videos?flow=grid&live_view=500&view=0&sort=dd
     
    Last edited by a moderator: Apr 28, 2014
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  2. WeedWhacker

    WeedWhacker Senior Member

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  3. Jason

    Jason Senior Member

    Why does NASA even do a test on wing vortices? Whats the point of testing for these and wasting money on it? Right? This is the kind of stuff the CT's probably use to propogate their malarchy because it seems senseless to test for something like this. Right?
     
  4. Leifer

    Leifer Senior Member

    .....to understand the safe distance at which a rear plane can fly behind a front plane.
    Wing (wake) vortices can cause the rear plane to mishandle, or crash.
     
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  5. Rico

    Rico Active Member

    Wake vortices have been the cause of several accidents and crashes. Most pilots are taught to understand them, so that they can avoid them. Air Traffic Controllers generally give a bit of separation between aircraft taking off or landing behind heavier aircraft to avoid wake vortices.
     
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  6. TWCobra

    TWCobra Senior Member

    Correct: Aircraft are assigned a wake turbulence category and there are hard limits on the distance/time you can be behind another aircraft on approach or on takeoff if they have a higher wake turbulence category than your own. There were three categories: Light, medium and heavy until the A380 went into service. It has its own category; Super. If you listen to ATC in the US you can hear aircraft with a Heavy or above category including the word in their callsign readbacks.
     
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  7. JFDee

    JFDee Senior Member

    Movie version of wake vortices - SFX, but still a nice illustration (both from "Pushing Tin"):


     
    Last edited: Apr 27, 2014
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  8. JFDee

    JFDee Senior Member

    The video in the opening post is also an excellent visualization of how aerodynamic contrails are forming in humid air.
     
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  9. Mick West

    Mick West Administrator Staff Member

    Not that unusual, depending on your local climate. Much more common in wetter climes like Manchester, UK, and Seattle, than at LAX - although we still get them because of proximity to the ocean.

    The video is not a wingtip vortex though, it's coming from the end of the flaps. Wingtip vortex would come from the wingtip, like:
    [​IMG]
    (Photo mine, plane is taking off into the Marine layer at LAX)

    There's some discussion of the distinction here:
    https://www.metabunk.org/threads/donut-chemtrail-why-pendules-and-crow-instability.1220/
     
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  10. Mick West

    Mick West Administrator Staff Member

    Turns out the OP was at LAX. I've edited the OP to include the original video (with non-bunk description), and added some other examples. This one is particularly nice:
     
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  11. KC-10FE

    KC-10FE Active Member

  12. Mick West

    Mick West Administrator Staff Member

    It's the same video as the one in the OP ("Cathay Pacific Boeing 777 300ER Amazing Vorticies Landing"), just retitled.
     
  13. Rational Bee

    Rational Bee New Member

    It's proof of the opposite, that contrails can innocently form in humid conditions. Either that or it's coincidence that the pilot forgets to turn off the spray in dense fog (and never forget when it's dry and clear).
     
  14. jaydeehess

    jaydeehess Senior Member

    here's a thought for the NWO and their chemtrail systems,,,, put an auto-shut off on them which causes the system to close as the aircraft descends through 10,000 feet ;):)
    No more embarrassing moments
     
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  15. Mick West

    Mick West Administrator Staff Member

    Here's the same location and event in the daytime
     
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  16. Mackdog

    Mackdog Active Member

    They forgot to mention the FEMA camp right below where the plane lands, all that barbed wire on top of the chain link fence looks mighty suspicious :eek:
     
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  17. WeedWhacker

    WeedWhacker Senior Member

    Oh dear. This is in Inglewood, California! They might not appreciate being called a "FEMA camp"! (Teasing...of course?)

    https://www.google.com/maps/place/I...m2!3m1!1s0x80c2b656274bdd8d:0x727b30fdcae3170

    (When you look at the diagram for LAX, Runway 24R is the northernmost. And, Runway 24L just south of it. Then, the Terminal area in the center, and two more Runways, 25R and 25L make up the "South Complex"....at LAX)
     
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  18. Mick West

    Mick West Administrator Staff Member

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  19. Mackdog

    Mackdog Active Member

    I figured maybe the NWO was practicing for how they would chemtrail people once they are in the FEMA camps... :p (joking of course)
     
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  20. WeedWhacker

    WeedWhacker Senior Member


    Sorry, but lower right corner..."In-n-Out here"...

    To quote Homer Simpson, "Drooling noise..."

    (In-N-Out Burger homepage)

    'Nuff said.

    {ALSO, not a direct "Homerism", but apropos:

    "There is probably no more accurate a phrase ever uttered
    than anything good is better buttered."
    }
     
    Last edited: Apr 28, 2014
  21. M Bornong

    M Bornong Senior Member

    Not nearly as dramatic as the videos, my wife managed to capture this trail last month, we were east bound on Lincoln Blvd. just before the curve in front of the grassy area. DSCF0028.
    And no, those aren't orbs forming a triangle around the plane, just a dirty windshield.
     
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  22. WeedWhacker

    WeedWhacker Senior Member

    Well....sidebar....in my boredom of "retirement", I am now working at the Home Depot on La Cienega ("West Inglewood"), just under the approach to Runway 24R. But yes, the exact boundaries of the various L.A. suburbs can be a puzzle, at times.
     
  23. Bill

    Bill Senior Member

    Is the any proof these are real airplanes and not a holographic false flag campaign to get us prepared for the actual chemtrail planes and FEMA camps?
     
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  24. WeedWhacker

    WeedWhacker Senior Member

    Is "there" any proof? ;)

    Yeah. Come visit, and camp out with me....we'll make a day of it! (kidding...).

    But despite the kidding, if ONLY these people who post videos such as this would actually devote some time to the science, and personal observations? Then maybe it would make a dent in the un-scientific clap-trap that IS the "chem"trail HOAX and MYTH and Urban Legend?
     
  25. Mick West

    Mick West Administrator Staff Member

    Similar type of vortex on a race car:
    [​IMG]

    These are typically short because cars are smaller and slower - but also because you don't often see cars go full speed in wet conditions - and when you do the spray will obscure the contrail.
     
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  26. Bill

    Bill Senior Member

    Only if you come and visit all the FEMA coffins in Georgia.
     
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  27. Bill

    Bill Senior Member

    How long have you been driving this?
     
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  28. WeedWhacker

    WeedWhacker Senior Member

    THAT is way cool! (No pun)

    Oh wait, searching for VERRRRY cold weather low-altitude AIRPLANE engine contrails, I found this!!:



    AGAIN, it is perfectly obvious to those who care to pay attention, that CONTRAILS are produced by the engines.

    Aerodynamic formations due to localized pressure differentials CAN make some pretty patterns, but they are NOT contrails.
     
  29. Mick West

    Mick West Administrator Staff Member

    Technically though they are. The word contrail is used to refer both to aerodynamic contrails and exhaust contrails, which is a great source of confusion.
     
  30. WeedWhacker

    WeedWhacker Senior Member

    True, that.

    Some less than accurate word usage, perhaps. But, whenever I refer to them, a contrail is defined by the usual sources:

    Wikipedia

    So, yes....hence the 'confusion' at times. AND the importance of this thread, to differentiate.

    But, for clarity when the topic of the MYTH of "chem"trails is raised, this refers to high-altitude contrails, generally. Notwithstanding the one-off topic of this thread.
     
  31. Mick West

    Mick West Administrator Staff Member

    Now they realize it is bogus, they claim that A) it's deliberate disinfo, and B) proved contrails can't persist except at 100% RH.
    http://chemtrailsplanet.net/2014/04...forgets-to-turn-off-chemtrails-while-landing/
    Which is wrong, because that's saturation with respect to water, when persistence just requires saturatons with respect to ice, which is about 60% of the water saturation.
     
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  32. Mumbles

    Mumbles Active Member

  33. Mumbles

    Mumbles Active Member


    From the link:

    "Although no data is presented to support high RH, the video reveals very humid conditions on the runway."

    Oxymoron much?
     
  34. George B

    George B Extinct but not forgotten Staff Member

    Mick, I must have missed this info presented in a direct fashion (60% of water saturation) in an authoritative quote. Could you point me to it? Would love to use it if it is clear enough for most people to understand.
     
  35. Mick West

    Mick West Administrator Staff Member

    Unfortunately it's a little complicated. But the key point is that the air needs to be ice saturated, not water saturated. To convert from RHw to RHi is a function of temperature and pressure. I've been meaning to do a calculator to demonstrate this. The actual value of RHw for 100% RHi varies between about 60% and 70%, so you see both figures given, depending on if they want to do an upper or lower bound.

    Some references:
    [​IMG]

    Note the red line. That's the "Max Temp for Persistence". Note how at the bottom it's about 70%, and at the top it's about 60% (the red line is between the 60% RH and 90% RH lines, the RH is not on the axes). The top is low pressure, high altitude, and there you see the red line is right on the 60% line

    Wikipedia:
    https://en.wikipedia.org/wiki/Contrail
    Which references:
    http://science-edu.larc.nasa.gov/contrail-edu/science.php
    Which does not give the 60% figure directly, but it's in the chart, and mentioned in the linked page:
    http://science-edu.larc.nasa.gov/contrail-edu/resources-activities-appleman_student.php
    I usually say "About 60%" or "about 60-70%". It depends on the context. Above 60% RHw contrails CAN persist, but the plane needs to be in high cold air - that's when you get a few lone contrails. Above 70% RHw, contrails will persist over a much wider range of altitudes - and that's when you get the criss-crossed skies.

    Notice on the chart there is no humidity level at which contrails will not form. You can get a contrail in 0% RHw if it's cold enough.
     
    Last edited: Apr 29, 2014
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  36. George B

    George B Extinct but not forgotten Staff Member

    Thanks Mick. I was afraid of just what you presented. That is part of the problem, I think, with the whole Chemtrail Conspiracy debate. The experts and the information are too complicated and intricate for the regular person to wrap their brain around when they see a simple yet distorted explanation presented to them. They must rely on the experts, who by nature, they don't trust to explain to them the science behind the persistent contrails.
     
    Last edited by a moderator: Apr 29, 2014
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  37. Mick West

    Mick West Administrator Staff Member

    Yes. It took me quite a while to fully understand the physics of contrail formation as they relate to humidity. I know it's not at all intuitive.

    And that Appleman chart is hard to read, and a source of confusion itself.
     
  38. cloudspotter

    cloudspotter Senior Member

    % maybe?
     
  39. George B

    George B Extinct but not forgotten Staff Member

    Wonder if NASA or FAA, etc. would take on such a task. Formulating an explanation of why persistent contrails form when clouds don't. Making it as direct and simple as possible so one could cite it as an authoritative source. Maybe we (Contrail Science/Metabunk) could write such a blurb and ask Dr Minnis to publish it?
     
  40. Hama Neggs

    Hama Neggs Senior Member

    It was exactly like that with the "Planet X" story. The real astronomy was too hard for a lot of people to understand, but they were willing to accept the scientific SOUNDING crap that came from the like of Nancy Lieder, because she spelled it all out for them and told them what to believe.
     
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