Rear window air-flow deflector?

Discussion in '3rd Gen - 2007 - 2017' started by NevadaGeo, Mar 19, 2017 at 8:54 AM.

  1. NevadaGeo

    NevadaGeo Full Access Members

    Posts:
    99
    Likes Received:
    21
    Joined:
    Mar 12, 2017
    Location:
    Spring Creek, Nevada (NE Nevada)
    This seems like an interesting workaround. I will check this out further. I just remember these type of deflectors were very common in days past. Perhaps now, they are not so common because they probably affect wind drag and mpg. Part of our lowest common denominator society...
     
  2. NevadaGeo

    NevadaGeo Full Access Members

    Posts:
    99
    Likes Received:
    21
    Joined:
    Mar 12, 2017
    Location:
    Spring Creek, Nevada (NE Nevada)
    Not a bad idea, but not the fix I am looking for. I will probably have to have someone fabricate this if I decide to pursue it further. Thanks guys.
     
  3. NevadaGeo

    NevadaGeo Full Access Members

    Posts:
    99
    Likes Received:
    21
    Joined:
    Mar 12, 2017
    Location:
    Spring Creek, Nevada (NE Nevada)
    I looked this over with the Expedition and the roof rack runners are too far forward for this to give the down draft necessary to keep dust off the rear window. But an interesting concept!
     
  4. powerboatr

    powerboatr Full Access Members

    Posts:
    158
    Likes Received:
    32
    Joined:
    May 16, 2016
    Location:
    North East Texas
    i went through this search insanity last june, for a deflector that actually forced air down the rear window.
    I too found all the ones above and none except the yakima thingy would even come close to directing air down the rear window
    we need a day at the wind tunnel.
    in the past on a f350 dually with the cab height leer cap, i manufactured a small deflector from alum and it was just high enough to grab some air and worked pretty good at keeping the major dust and water off at speeds.
    been tossing a few things around to make another small deflector to do the same.

    we have a huge wind burble area on the rear window and liftgate, i imagine its not enough to change mpg, or ford would have made one, but it may be enough to keep rear window cleaner.
    the burble does help aerodynamically speaking as it forms a bubble that allow the rest of the airflow down and around the flat side of the rear end,


    maybe time for some cardboard mock ups
     
  5. NevadaGeo

    NevadaGeo Full Access Members

    Posts:
    99
    Likes Received:
    21
    Joined:
    Mar 12, 2017
    Location:
    Spring Creek, Nevada (NE Nevada)
    powerboatr, could you clarify this statement? What is a wind "burble" area? Is that Texas speak?:burnout:
     
  6. powerboatr

    powerboatr Full Access Members

    Posts:
    158
    Likes Received:
    32
    Joined:
    May 16, 2016
    Location:
    North East Texas
    burble/bubble or rolling air flow that acts like an object, in relation to the other air around it
    that is the swirling of air that occurs off a sharp angle break, like in our roofs to the lift gate is a sharp edge and it creates burbles/bubble or rolling masses of air, its almost a solid that it will cause air flow that is not part of the burble/bubble to flow past and gain some streamlining effect.
    best way to see it in action, is in the rain watching air flow around a semi trailer
    or some wind tunnel videos
     
    NevadaGeo likes this.
  7. NevadaGeo

    NevadaGeo Full Access Members

    Posts:
    99
    Likes Received:
    21
    Joined:
    Mar 12, 2017
    Location:
    Spring Creek, Nevada (NE Nevada)
    Okay, now I understand perfectly. I love your description! As a scientist, visuals like that make sense. Thanks.
     
  8. powerboatr

    powerboatr Full Access Members

    Posts:
    158
    Likes Received:
    32
    Joined:
    May 16, 2016
    Location:
    North East Texas
    oh shit we have two rogue scientists on board the site...
    but i stray back to my aviation roots more than the evil genius that lies within :Big Laugh:
     
    Adieu likes this.
  9. ExpeditionAndy

    ExpeditionAndy Supporting Member Supporting Member

    Age:
    59
    Posts:
    780
    Likes Received:
    100
    Joined:
    Aug 31, 2013
    Location:
    Indiana
    Now that you mention it, I build and fly radio controlled airplanes, and I was just thinking that if you gave this deflector an airfoil, you could get the air moving faster over the top surface and with an under cambered shape you might be able to direct the air right on to the window. Just a thought.
     
  10. NevadaGeo

    NevadaGeo Full Access Members

    Posts:
    99
    Likes Received:
    21
    Joined:
    Mar 12, 2017
    Location:
    Spring Creek, Nevada (NE Nevada)
    I love it to get the juices flowing. Go for it! Rogue science will win!
     

Share This Page