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OT - 737 wing things...

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  • OT - 737 wing things...

    Flew out to St. Louis the other day in a Southwest 737. Looking out on the wing, there are three sort of wedge shaped structures under each one. This is a picture I snapped. What exactly are those things? I presume they somehow modify the airflow over the wing, but anyone know any other specifics? Less, drag, more lift, smoother flow, ????

    Just curious, and you guys know something about everything...

    Last edited by alanganes; 11-07-2012, 04:26 PM.

  • #2
    Maybe fairings over bits that move the bits that move?

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    • #3
      I don't know, they move up and down when the flaps are extended and extend the front of the wing as well.
      Last edited by alanganes; 11-07-2012, 04:30 PM.

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      • #4
        It is a recent mod from Boeing that provide short field takeoff capability and greater landing weight.


        The 737-800s are equipped with Blended Winglets and Boeing's special short-field performance package designed for short runways such as Santos Dumont in Rio de Janeiro.
        See here:

        http://www.boeing.com/news/releases/...80828g_pr.html
        Free software for calculating bolt circles and similar: Click Here

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        • #5
          Those are air-to-air missiles to blast geese out of the sky before they get sucked into an engine.

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          • #6
            http://www.b737.org.uk/flightcontrol...ing_Edge_Flaps

            Here ya go.

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            • #7
              Flap track fairings. The wing chord increases as the flaps travel rearward & downward. The pivot points are outside the wing's main structure.
              Milton

              "Accuracy is the sum total of your compensating mistakes."

              "The thing I hate about an argument is that it always interrupts a discussion." G. K. Chesterton

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              • #8
                Originally posted by DICKEYBIRD View Post
                Flap track fairings. The wing chord increases as the flaps travel rearward & downward. The pivot points are outside the wing's main structure.
                You got it, Dickeybird!

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                • #9
                  Ah-ha! thanks guys, my curiosity is appeased. Very interesting setup there.

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                  • #10
                    Originally posted by DICKEYBIRD View Post
                    Flap track fairings. The wing chord increases as the flaps travel rearward & downward. The pivot points are outside the wing's main structure.
                    That has to be one of my favourite seats when flying. I just love how, when coming in to land, the trailing edge unfolds itself into multiple flaps, slats and bits - just wonderful

                    Richard

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                    • #11
                      Originally posted by RLWP View Post
                      That has to be one of my favourite seats when flying. I just love how, when coming in to land, the trailing edge unfolds itself into multiple flaps, slats and bits - just wonderful

                      Richard
                      Aren't we mechanical geeks... that's my favorite seat, too Richard!

                      Mike

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                      • #12
                        My favorite seat is first row, window. Nobody gets up to walk over me, free drinks, and personal service. After 3 million miles, I deserve it.

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                        • #13
                          Those are camera pods, taking pictures of your house and everything you do.........

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                          • #14
                            Originally posted by tdkkart View Post
                            Those are camera pods, taking pictures of your house and everything you do.........
                            The outer pair are the chem trail dispensers...

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                            • #15
                              They cover ball screws used to lower and raise the flaps. Each panel has two.

                              Worked one one airplane that had 7 flaps per wing. The inboard flap's ball screw was over 8 feet long. All the flaps are driven by torque tubes “T” gearboxes thought torque limiters and locks. The last being 3 balls between two plates that when spun too fast, push apart to lock the ball screw in place to stop the flap from going places when things go wrong.

                              10 years of working on a fleet of very large airplanes. I can still remember it all and it has been 15 years.

                              It is also why I hate to fly.

                              But all you see is the fairing.

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