Why do newer 737s use two different styles of split winglets?Why can’t more older 737s be retrofitted with more newer winglets?Why don't horizontal stabilizers have winglets?Why do propeller blades not have winglets?Why are there different types of winglets?Why don't airliner winglets have consumer advertising on them?What are some differences that make the new 737 MAX winglets more efficient than a conventional winglet?Winglets vs Sharklets vs Blended wingtipsWhy are downward pointing winglets more efficient?Why has Boeing used mini winglets on the 737-200?Aerodynamics of double wingletsWhy do some airplanes have their winglets at different angles?

Why doesn't the fusion process of the sun speed up?

What will the french man say?

"Marked down as someone wanting to sell shares." What does that mean?

10 year ban after applying for a UK student visa

Is "inadequate referencing" a euphemism for plagiarism?

Someone scrambled my calling sign- who am I?

Air travel with refrigerated insulin

Weird lines in Microsoft Word

Exposing a company lying about themselves in a tight-knitted industry: Is my career at risk on the long run?

Emojional cryptic crossword

If I cast enlarge/reduce on an arrow, what weapon could it count as?

Pre-Employment Background Check With Consent For Future Checks

What kind of footwear is suitable for walking in micro gravity environment?

Probabilities in non-stationary states

How much propellant is used up until liftoff?

Can "few" be used as a subject? If so, what is the rule?

What is it called when someone votes for an option that's not their first choice?

Make the largest box from a cardboard sheet

How to test the sharpness of a knife?

Why does Surtur say that Thor is Asgard's doom?

Friend wants my recommendation but I don't want to

Is there any common country to visit for uk and schengen visa?

How to balance a monster modification (zombie)?

Norwegian Refugee travel document



Why do newer 737s use two different styles of split winglets?


Why can’t more older 737s be retrofitted with more newer winglets?Why don't horizontal stabilizers have winglets?Why do propeller blades not have winglets?Why are there different types of winglets?Why don't airliner winglets have consumer advertising on them?What are some differences that make the new 737 MAX winglets more efficient than a conventional winglet?Winglets vs Sharklets vs Blended wingtipsWhy are downward pointing winglets more efficient?Why has Boeing used mini winglets on the 737-200?Aerodynamics of double wingletsWhy do some airplanes have their winglets at different angles?













6












$begingroup$


All new 737s use split-tip winglets, which are more efficient than the simpler blended winglets previously used.



However, for no clear reason, they use two different types of split-tip winglet:



  • New 737 Next Generations (the 737-700/-800/-900)1 use split-scimitar winglets, which have a main body shaped like a blended winglet, but with its upper tip hooked backwards, and also have an additional scimitar-shaped fin projecting outwards and backwards from the upbend in the winglet.

Split-scimitar winglet



(Image by Mnts at Wikimedia Commons.)



  • The 737 MAX series uses the eponymous MAX winglets, which have a simpler shape than the split-scimitar winglet, looking essentially like if someone decided to put a winglet on the bottom of the wingtip in addition to the one at the top.

MAX winglet



(Image by Aka The Beav at Flickr, via Helmy oved at Wikimedia Commons, modified by Altair78 at Wikimedia Commons.)



I don’t get it - why go to the trouble of producing two slightly different styles of winglet alongside each other for two mostly-similar families of the same aircraft? Why not just go with the more efficient style of the two (be it the split-scimitar winglet or the MAX winglet), and use that on both the Next Generation and the MAX?




1: The 737-600 also belongs to the Next Generation family, but it left production long before the Next Generations switched from the blended to the split-scimitar winglet.










share|improve this question









$endgroup$







  • 4




    $begingroup$
    I wonder if the 737 ULTRA will have two winglets sprouting from each winglet...
    $endgroup$
    – ymb1
    yesterday






  • 9




    $begingroup$
    @ymb1 The 737 FRACTAL will have an infinite tree of smaller and smaller winglets. This will be so efficient, it will land with more fuel in the tanks than when it took off.
    $endgroup$
    – David Richerby
    yesterday






  • 4




    $begingroup$
    @DavidRicherby: To get regulatory approval for that, the 737 FRACTAL will dump fuel before landing so that pilots will not have to be trained to deal with the heavier landing off weights. Of course, there will be no training so fuel may be dumped on the same school under the flight path multiple times per day, and the US will be the last to ban the plane.
    $endgroup$
    – dotancohen
    yesterday






  • 1




    $begingroup$
    If I had to guess, the two different winglets have been added probably because of the certification process of the retrofit NG winglets. The scimitars still look a lot like the older winglets, which means they probably could install the changed winglet tip and the added lower winglet without having to change much of the outer wing structure and without expensive costs for certifying a totally different design. Even the position of the lights changed on the MAX - that all needs to be certified and they probably wanted to save money at the time they added the scimitars.
    $endgroup$
    – Jan
    yesterday
















6












$begingroup$


All new 737s use split-tip winglets, which are more efficient than the simpler blended winglets previously used.



However, for no clear reason, they use two different types of split-tip winglet:



  • New 737 Next Generations (the 737-700/-800/-900)1 use split-scimitar winglets, which have a main body shaped like a blended winglet, but with its upper tip hooked backwards, and also have an additional scimitar-shaped fin projecting outwards and backwards from the upbend in the winglet.

Split-scimitar winglet



(Image by Mnts at Wikimedia Commons.)



  • The 737 MAX series uses the eponymous MAX winglets, which have a simpler shape than the split-scimitar winglet, looking essentially like if someone decided to put a winglet on the bottom of the wingtip in addition to the one at the top.

MAX winglet



(Image by Aka The Beav at Flickr, via Helmy oved at Wikimedia Commons, modified by Altair78 at Wikimedia Commons.)



I don’t get it - why go to the trouble of producing two slightly different styles of winglet alongside each other for two mostly-similar families of the same aircraft? Why not just go with the more efficient style of the two (be it the split-scimitar winglet or the MAX winglet), and use that on both the Next Generation and the MAX?




1: The 737-600 also belongs to the Next Generation family, but it left production long before the Next Generations switched from the blended to the split-scimitar winglet.










share|improve this question









$endgroup$







  • 4




    $begingroup$
    I wonder if the 737 ULTRA will have two winglets sprouting from each winglet...
    $endgroup$
    – ymb1
    yesterday






  • 9




    $begingroup$
    @ymb1 The 737 FRACTAL will have an infinite tree of smaller and smaller winglets. This will be so efficient, it will land with more fuel in the tanks than when it took off.
    $endgroup$
    – David Richerby
    yesterday






  • 4




    $begingroup$
    @DavidRicherby: To get regulatory approval for that, the 737 FRACTAL will dump fuel before landing so that pilots will not have to be trained to deal with the heavier landing off weights. Of course, there will be no training so fuel may be dumped on the same school under the flight path multiple times per day, and the US will be the last to ban the plane.
    $endgroup$
    – dotancohen
    yesterday






  • 1




    $begingroup$
    If I had to guess, the two different winglets have been added probably because of the certification process of the retrofit NG winglets. The scimitars still look a lot like the older winglets, which means they probably could install the changed winglet tip and the added lower winglet without having to change much of the outer wing structure and without expensive costs for certifying a totally different design. Even the position of the lights changed on the MAX - that all needs to be certified and they probably wanted to save money at the time they added the scimitars.
    $endgroup$
    – Jan
    yesterday














6












6








6





$begingroup$


All new 737s use split-tip winglets, which are more efficient than the simpler blended winglets previously used.



However, for no clear reason, they use two different types of split-tip winglet:



  • New 737 Next Generations (the 737-700/-800/-900)1 use split-scimitar winglets, which have a main body shaped like a blended winglet, but with its upper tip hooked backwards, and also have an additional scimitar-shaped fin projecting outwards and backwards from the upbend in the winglet.

Split-scimitar winglet



(Image by Mnts at Wikimedia Commons.)



  • The 737 MAX series uses the eponymous MAX winglets, which have a simpler shape than the split-scimitar winglet, looking essentially like if someone decided to put a winglet on the bottom of the wingtip in addition to the one at the top.

MAX winglet



(Image by Aka The Beav at Flickr, via Helmy oved at Wikimedia Commons, modified by Altair78 at Wikimedia Commons.)



I don’t get it - why go to the trouble of producing two slightly different styles of winglet alongside each other for two mostly-similar families of the same aircraft? Why not just go with the more efficient style of the two (be it the split-scimitar winglet or the MAX winglet), and use that on both the Next Generation and the MAX?




1: The 737-600 also belongs to the Next Generation family, but it left production long before the Next Generations switched from the blended to the split-scimitar winglet.










share|improve this question









$endgroup$




All new 737s use split-tip winglets, which are more efficient than the simpler blended winglets previously used.



However, for no clear reason, they use two different types of split-tip winglet:



  • New 737 Next Generations (the 737-700/-800/-900)1 use split-scimitar winglets, which have a main body shaped like a blended winglet, but with its upper tip hooked backwards, and also have an additional scimitar-shaped fin projecting outwards and backwards from the upbend in the winglet.

Split-scimitar winglet



(Image by Mnts at Wikimedia Commons.)



  • The 737 MAX series uses the eponymous MAX winglets, which have a simpler shape than the split-scimitar winglet, looking essentially like if someone decided to put a winglet on the bottom of the wingtip in addition to the one at the top.

MAX winglet



(Image by Aka The Beav at Flickr, via Helmy oved at Wikimedia Commons, modified by Altair78 at Wikimedia Commons.)



I don’t get it - why go to the trouble of producing two slightly different styles of winglet alongside each other for two mostly-similar families of the same aircraft? Why not just go with the more efficient style of the two (be it the split-scimitar winglet or the MAX winglet), and use that on both the Next Generation and the MAX?




1: The 737-600 also belongs to the Next Generation family, but it left production long before the Next Generations switched from the blended to the split-scimitar winglet.







boeing-737 winglets






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked yesterday









SeanSean

5,14822565




5,14822565







  • 4




    $begingroup$
    I wonder if the 737 ULTRA will have two winglets sprouting from each winglet...
    $endgroup$
    – ymb1
    yesterday






  • 9




    $begingroup$
    @ymb1 The 737 FRACTAL will have an infinite tree of smaller and smaller winglets. This will be so efficient, it will land with more fuel in the tanks than when it took off.
    $endgroup$
    – David Richerby
    yesterday






  • 4




    $begingroup$
    @DavidRicherby: To get regulatory approval for that, the 737 FRACTAL will dump fuel before landing so that pilots will not have to be trained to deal with the heavier landing off weights. Of course, there will be no training so fuel may be dumped on the same school under the flight path multiple times per day, and the US will be the last to ban the plane.
    $endgroup$
    – dotancohen
    yesterday






  • 1




    $begingroup$
    If I had to guess, the two different winglets have been added probably because of the certification process of the retrofit NG winglets. The scimitars still look a lot like the older winglets, which means they probably could install the changed winglet tip and the added lower winglet without having to change much of the outer wing structure and without expensive costs for certifying a totally different design. Even the position of the lights changed on the MAX - that all needs to be certified and they probably wanted to save money at the time they added the scimitars.
    $endgroup$
    – Jan
    yesterday













  • 4




    $begingroup$
    I wonder if the 737 ULTRA will have two winglets sprouting from each winglet...
    $endgroup$
    – ymb1
    yesterday






  • 9




    $begingroup$
    @ymb1 The 737 FRACTAL will have an infinite tree of smaller and smaller winglets. This will be so efficient, it will land with more fuel in the tanks than when it took off.
    $endgroup$
    – David Richerby
    yesterday






  • 4




    $begingroup$
    @DavidRicherby: To get regulatory approval for that, the 737 FRACTAL will dump fuel before landing so that pilots will not have to be trained to deal with the heavier landing off weights. Of course, there will be no training so fuel may be dumped on the same school under the flight path multiple times per day, and the US will be the last to ban the plane.
    $endgroup$
    – dotancohen
    yesterday






  • 1




    $begingroup$
    If I had to guess, the two different winglets have been added probably because of the certification process of the retrofit NG winglets. The scimitars still look a lot like the older winglets, which means they probably could install the changed winglet tip and the added lower winglet without having to change much of the outer wing structure and without expensive costs for certifying a totally different design. Even the position of the lights changed on the MAX - that all needs to be certified and they probably wanted to save money at the time they added the scimitars.
    $endgroup$
    – Jan
    yesterday








4




4




$begingroup$
I wonder if the 737 ULTRA will have two winglets sprouting from each winglet...
$endgroup$
– ymb1
yesterday




$begingroup$
I wonder if the 737 ULTRA will have two winglets sprouting from each winglet...
$endgroup$
– ymb1
yesterday




9




9




$begingroup$
@ymb1 The 737 FRACTAL will have an infinite tree of smaller and smaller winglets. This will be so efficient, it will land with more fuel in the tanks than when it took off.
$endgroup$
– David Richerby
yesterday




$begingroup$
@ymb1 The 737 FRACTAL will have an infinite tree of smaller and smaller winglets. This will be so efficient, it will land with more fuel in the tanks than when it took off.
$endgroup$
– David Richerby
yesterday




4




4




$begingroup$
@DavidRicherby: To get regulatory approval for that, the 737 FRACTAL will dump fuel before landing so that pilots will not have to be trained to deal with the heavier landing off weights. Of course, there will be no training so fuel may be dumped on the same school under the flight path multiple times per day, and the US will be the last to ban the plane.
$endgroup$
– dotancohen
yesterday




$begingroup$
@DavidRicherby: To get regulatory approval for that, the 737 FRACTAL will dump fuel before landing so that pilots will not have to be trained to deal with the heavier landing off weights. Of course, there will be no training so fuel may be dumped on the same school under the flight path multiple times per day, and the US will be the last to ban the plane.
$endgroup$
– dotancohen
yesterday




1




1




$begingroup$
If I had to guess, the two different winglets have been added probably because of the certification process of the retrofit NG winglets. The scimitars still look a lot like the older winglets, which means they probably could install the changed winglet tip and the added lower winglet without having to change much of the outer wing structure and without expensive costs for certifying a totally different design. Even the position of the lights changed on the MAX - that all needs to be certified and they probably wanted to save money at the time they added the scimitars.
$endgroup$
– Jan
yesterday





$begingroup$
If I had to guess, the two different winglets have been added probably because of the certification process of the retrofit NG winglets. The scimitars still look a lot like the older winglets, which means they probably could install the changed winglet tip and the added lower winglet without having to change much of the outer wing structure and without expensive costs for certifying a totally different design. Even the position of the lights changed on the MAX - that all needs to be certified and they probably wanted to save money at the time they added the scimitars.
$endgroup$
– Jan
yesterday











2 Answers
2






active

oldest

votes


















5












$begingroup$

The 737NG was originally introduced with with no winglets. A company called Aviation Partners worked with Boeing to develop the "blended" winglet, originally for the NG-based BBJ (Boeing Business Jet). Customers then had them installed after delivery for a while before Boeing worked their own version into the production line. There is a similar case now with the split scimitar, where Boeing is delivering the 737NG with the "blended" winglet and customers are having it replaced with the split scimitar from Aviation Partners Boeing sometime after delivery if they choose.



One reason for developing a new winglet on the MAX is that it helps differentiate it from the NG and has become part of its "brand."



There also may be a consideration for cost from certifying the new winglets. As the split scimitar and MAX designs are so similar overall, there may not be enough benefit of the MAX design to justify certifying it for the NG, where they needed to do extensive flight testing on the MAX anyway. The split scimitar is also somewhat a modified blended winglet, which may have made certification easier.






share|improve this answer









$endgroup$












  • $begingroup$
    Like I said, "styling".
    $endgroup$
    – John K
    yesterday


















4












$begingroup$

Since a winglet is basically a sail generating thrust (lift with a modest forward-tilted vector) from the circulating flow around the tip, it's just adding another sail beside the first one to extract more of the available energy from the flow. Different engineering groups will do studies of different configurations and will say, "hey, if we do this, it'll be some little bit more efficient than if we do that, based on our particular analysis".



If you put different groups of engineers together to attack the problem, they are all going to come out with variations on what they think is the ideal configuration. And so you see seemingly endless permutations that are, really, mostly nibbling at the margins of the major benefit that was achieved when you put one there in the first place.



Plus there is probably a bit of "styling" going on as well. Just to be different.






share|improve this answer









$endgroup$












    Your Answer





    StackExchange.ifUsing("editor", function ()
    return StackExchange.using("mathjaxEditing", function ()
    StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
    StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
    );
    );
    , "mathjax-editing");

    StackExchange.ready(function()
    var channelOptions =
    tags: "".split(" "),
    id: "528"
    ;
    initTagRenderer("".split(" "), "".split(" "), channelOptions);

    StackExchange.using("externalEditor", function()
    // Have to fire editor after snippets, if snippets enabled
    if (StackExchange.settings.snippets.snippetsEnabled)
    StackExchange.using("snippets", function()
    createEditor();
    );

    else
    createEditor();

    );

    function createEditor()
    StackExchange.prepareEditor(
    heartbeatType: 'answer',
    autoActivateHeartbeat: false,
    convertImagesToLinks: false,
    noModals: true,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: null,
    bindNavPrevention: true,
    postfix: "",
    imageUploader:
    brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
    contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
    allowUrls: true
    ,
    noCode: true, onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    );



    );













    draft saved

    draft discarded


















    StackExchange.ready(
    function ()
    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faviation.stackexchange.com%2fquestions%2f61248%2fwhy-do-newer-737s-use-two-different-styles-of-split-winglets%23new-answer', 'question_page');

    );

    Post as a guest















    Required, but never shown

























    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    5












    $begingroup$

    The 737NG was originally introduced with with no winglets. A company called Aviation Partners worked with Boeing to develop the "blended" winglet, originally for the NG-based BBJ (Boeing Business Jet). Customers then had them installed after delivery for a while before Boeing worked their own version into the production line. There is a similar case now with the split scimitar, where Boeing is delivering the 737NG with the "blended" winglet and customers are having it replaced with the split scimitar from Aviation Partners Boeing sometime after delivery if they choose.



    One reason for developing a new winglet on the MAX is that it helps differentiate it from the NG and has become part of its "brand."



    There also may be a consideration for cost from certifying the new winglets. As the split scimitar and MAX designs are so similar overall, there may not be enough benefit of the MAX design to justify certifying it for the NG, where they needed to do extensive flight testing on the MAX anyway. The split scimitar is also somewhat a modified blended winglet, which may have made certification easier.






    share|improve this answer









    $endgroup$












    • $begingroup$
      Like I said, "styling".
      $endgroup$
      – John K
      yesterday















    5












    $begingroup$

    The 737NG was originally introduced with with no winglets. A company called Aviation Partners worked with Boeing to develop the "blended" winglet, originally for the NG-based BBJ (Boeing Business Jet). Customers then had them installed after delivery for a while before Boeing worked their own version into the production line. There is a similar case now with the split scimitar, where Boeing is delivering the 737NG with the "blended" winglet and customers are having it replaced with the split scimitar from Aviation Partners Boeing sometime after delivery if they choose.



    One reason for developing a new winglet on the MAX is that it helps differentiate it from the NG and has become part of its "brand."



    There also may be a consideration for cost from certifying the new winglets. As the split scimitar and MAX designs are so similar overall, there may not be enough benefit of the MAX design to justify certifying it for the NG, where they needed to do extensive flight testing on the MAX anyway. The split scimitar is also somewhat a modified blended winglet, which may have made certification easier.






    share|improve this answer









    $endgroup$












    • $begingroup$
      Like I said, "styling".
      $endgroup$
      – John K
      yesterday













    5












    5








    5





    $begingroup$

    The 737NG was originally introduced with with no winglets. A company called Aviation Partners worked with Boeing to develop the "blended" winglet, originally for the NG-based BBJ (Boeing Business Jet). Customers then had them installed after delivery for a while before Boeing worked their own version into the production line. There is a similar case now with the split scimitar, where Boeing is delivering the 737NG with the "blended" winglet and customers are having it replaced with the split scimitar from Aviation Partners Boeing sometime after delivery if they choose.



    One reason for developing a new winglet on the MAX is that it helps differentiate it from the NG and has become part of its "brand."



    There also may be a consideration for cost from certifying the new winglets. As the split scimitar and MAX designs are so similar overall, there may not be enough benefit of the MAX design to justify certifying it for the NG, where they needed to do extensive flight testing on the MAX anyway. The split scimitar is also somewhat a modified blended winglet, which may have made certification easier.






    share|improve this answer









    $endgroup$



    The 737NG was originally introduced with with no winglets. A company called Aviation Partners worked with Boeing to develop the "blended" winglet, originally for the NG-based BBJ (Boeing Business Jet). Customers then had them installed after delivery for a while before Boeing worked their own version into the production line. There is a similar case now with the split scimitar, where Boeing is delivering the 737NG with the "blended" winglet and customers are having it replaced with the split scimitar from Aviation Partners Boeing sometime after delivery if they choose.



    One reason for developing a new winglet on the MAX is that it helps differentiate it from the NG and has become part of its "brand."



    There also may be a consideration for cost from certifying the new winglets. As the split scimitar and MAX designs are so similar overall, there may not be enough benefit of the MAX design to justify certifying it for the NG, where they needed to do extensive flight testing on the MAX anyway. The split scimitar is also somewhat a modified blended winglet, which may have made certification easier.







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered yesterday









    foootfooot

    53.2k17168321




    53.2k17168321











    • $begingroup$
      Like I said, "styling".
      $endgroup$
      – John K
      yesterday
















    • $begingroup$
      Like I said, "styling".
      $endgroup$
      – John K
      yesterday















    $begingroup$
    Like I said, "styling".
    $endgroup$
    – John K
    yesterday




    $begingroup$
    Like I said, "styling".
    $endgroup$
    – John K
    yesterday











    4












    $begingroup$

    Since a winglet is basically a sail generating thrust (lift with a modest forward-tilted vector) from the circulating flow around the tip, it's just adding another sail beside the first one to extract more of the available energy from the flow. Different engineering groups will do studies of different configurations and will say, "hey, if we do this, it'll be some little bit more efficient than if we do that, based on our particular analysis".



    If you put different groups of engineers together to attack the problem, they are all going to come out with variations on what they think is the ideal configuration. And so you see seemingly endless permutations that are, really, mostly nibbling at the margins of the major benefit that was achieved when you put one there in the first place.



    Plus there is probably a bit of "styling" going on as well. Just to be different.






    share|improve this answer









    $endgroup$

















      4












      $begingroup$

      Since a winglet is basically a sail generating thrust (lift with a modest forward-tilted vector) from the circulating flow around the tip, it's just adding another sail beside the first one to extract more of the available energy from the flow. Different engineering groups will do studies of different configurations and will say, "hey, if we do this, it'll be some little bit more efficient than if we do that, based on our particular analysis".



      If you put different groups of engineers together to attack the problem, they are all going to come out with variations on what they think is the ideal configuration. And so you see seemingly endless permutations that are, really, mostly nibbling at the margins of the major benefit that was achieved when you put one there in the first place.



      Plus there is probably a bit of "styling" going on as well. Just to be different.






      share|improve this answer









      $endgroup$















        4












        4








        4





        $begingroup$

        Since a winglet is basically a sail generating thrust (lift with a modest forward-tilted vector) from the circulating flow around the tip, it's just adding another sail beside the first one to extract more of the available energy from the flow. Different engineering groups will do studies of different configurations and will say, "hey, if we do this, it'll be some little bit more efficient than if we do that, based on our particular analysis".



        If you put different groups of engineers together to attack the problem, they are all going to come out with variations on what they think is the ideal configuration. And so you see seemingly endless permutations that are, really, mostly nibbling at the margins of the major benefit that was achieved when you put one there in the first place.



        Plus there is probably a bit of "styling" going on as well. Just to be different.






        share|improve this answer









        $endgroup$



        Since a winglet is basically a sail generating thrust (lift with a modest forward-tilted vector) from the circulating flow around the tip, it's just adding another sail beside the first one to extract more of the available energy from the flow. Different engineering groups will do studies of different configurations and will say, "hey, if we do this, it'll be some little bit more efficient than if we do that, based on our particular analysis".



        If you put different groups of engineers together to attack the problem, they are all going to come out with variations on what they think is the ideal configuration. And so you see seemingly endless permutations that are, really, mostly nibbling at the margins of the major benefit that was achieved when you put one there in the first place.



        Plus there is probably a bit of "styling" going on as well. Just to be different.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered yesterday









        John KJohn K

        22.1k13066




        22.1k13066



























            draft saved

            draft discarded
















































            Thanks for contributing an answer to Aviation Stack Exchange!


            • Please be sure to answer the question. Provide details and share your research!

            But avoid


            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.

            Use MathJax to format equations. MathJax reference.


            To learn more, see our tips on writing great answers.




            draft saved


            draft discarded














            StackExchange.ready(
            function ()
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faviation.stackexchange.com%2fquestions%2f61248%2fwhy-do-newer-737s-use-two-different-styles-of-split-winglets%23new-answer', 'question_page');

            );

            Post as a guest















            Required, but never shown





















































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown

































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown







            Popular posts from this blog

            Færeyskur hestur Heimild | Tengill | Tilvísanir | LeiðsagnarvalRossið - síða um færeyska hrossið á færeyskuGott ár hjá færeyska hestinum

            He _____ here since 1970 . Answer needed [closed]What does “since he was so high” mean?Meaning of “catch birds for”?How do I ensure “since” takes the meaning I want?“Who cares here” meaningWhat does “right round toward” mean?the time tense (had now been detected)What does the phrase “ring around the roses” mean here?Correct usage of “visited upon”Meaning of “foiled rail sabotage bid”It was the third time I had gone to Rome or It is the third time I had been to Rome

            Slayer Innehåll Historia | Stil, komposition och lyrik | Bandets betydelse och framgångar | Sidoprojekt och samarbeten | Kontroverser | Medlemmar | Utmärkelser och nomineringar | Turnéer och festivaler | Diskografi | Referenser | Externa länkar | Navigeringsmenywww.slayer.net”Metal Massacre vol. 1””Metal Massacre vol. 3””Metal Massacre Volume III””Show No Mercy””Haunting the Chapel””Live Undead””Hell Awaits””Reign in Blood””Reign in Blood””Gold & Platinum – Reign in Blood””Golden Gods Awards Winners”originalet”Kerrang! Hall Of Fame””Slayer Looks Back On 37-Year Career In New Video Series: Part Two””South of Heaven””Gold & Platinum – South of Heaven””Seasons in the Abyss””Gold & Platinum - Seasons in the Abyss””Divine Intervention””Divine Intervention - Release group by Slayer””Gold & Platinum - Divine Intervention””Live Intrusion””Undisputed Attitude””Abolish Government/Superficial Love””Release “Slatanic Slaughter: A Tribute to Slayer” by Various Artists””Diabolus in Musica””Soundtrack to the Apocalypse””God Hates Us All””Systematic - Relationships””War at the Warfield””Gold & Platinum - War at the Warfield””Soundtrack to the Apocalypse””Gold & Platinum - Still Reigning””Metallica, Slayer, Iron Mauden Among Winners At Metal Hammer Awards””Eternal Pyre””Eternal Pyre - Slayer release group””Eternal Pyre””Metal Storm Awards 2006””Kerrang! Hall Of Fame””Slayer Wins 'Best Metal' Grammy Award””Slayer Guitarist Jeff Hanneman Dies””Bullet-For My Valentine booed at Metal Hammer Golden Gods Awards””Unholy Aliance””The End Of Slayer?””Slayer: We Could Thrash Out Two More Albums If We're Fast Enough...””'The Unholy Alliance: Chapter III' UK Dates Added”originalet”Megadeth And Slayer To Co-Headline 'Canadian Carnage' Trek”originalet”World Painted Blood””Release “World Painted Blood” by Slayer””Metallica Heading To Cinemas””Slayer, Megadeth To Join Forces For 'European Carnage' Tour - Dec. 18, 2010”originalet”Slayer's Hanneman Contracts Acute Infection; Band To Bring In Guest Guitarist””Cannibal Corpse's Pat O'Brien Will Step In As Slayer's Guest Guitarist”originalet”Slayer’s Jeff Hanneman Dead at 49””Dave Lombardo Says He Made Only $67,000 In 2011 While Touring With Slayer””Slayer: We Do Not Agree With Dave Lombardo's Substance Or Timeline Of Events””Slayer Welcomes Drummer Paul Bostaph Back To The Fold””Slayer Hope to Unveil Never-Before-Heard Jeff Hanneman Material on Next Album””Slayer Debut New Song 'Implode' During Surprise Golden Gods Appearance””Release group Repentless by Slayer””Repentless - Slayer - Credits””Slayer””Metal Storm Awards 2015””Slayer - to release comic book "Repentless #1"””Slayer To Release 'Repentless' 6.66" Vinyl Box Set””BREAKING NEWS: Slayer Announce Farewell Tour””Slayer Recruit Lamb of God, Anthrax, Behemoth + Testament for Final Tour””Slayer lägger ner efter 37 år””Slayer Announces Second North American Leg Of 'Final' Tour””Final World Tour””Slayer Announces Final European Tour With Lamb of God, Anthrax And Obituary””Slayer To Tour Europe With Lamb of God, Anthrax And Obituary””Slayer To Play 'Last French Show Ever' At Next Year's Hellfst””Slayer's Final World Tour Will Extend Into 2019””Death Angel's Rob Cavestany On Slayer's 'Farewell' Tour: 'Some Of Us Could See This Coming'””Testament Has No Plans To Retire Anytime Soon, Says Chuck Billy””Anthrax's Scott Ian On Slayer's 'Farewell' Tour Plans: 'I Was Surprised And I Wasn't Surprised'””Slayer””Slayer's Morbid Schlock””Review/Rock; For Slayer, the Mania Is the Message””Slayer - Biography””Slayer - Reign In Blood”originalet”Dave Lombardo””An exclusive oral history of Slayer”originalet”Exclusive! Interview With Slayer Guitarist Jeff Hanneman”originalet”Thinking Out Loud: Slayer's Kerry King on hair metal, Satan and being polite””Slayer Lyrics””Slayer - Biography””Most influential artists for extreme metal music””Slayer - Reign in Blood””Slayer guitarist Jeff Hanneman dies aged 49””Slatanic Slaughter: A Tribute to Slayer””Gateway to Hell: A Tribute to Slayer””Covered In Blood””Slayer: The Origins of Thrash in San Francisco, CA.””Why They Rule - #6 Slayer”originalet”Guitar World's 100 Greatest Heavy Metal Guitarists Of All Time”originalet”The fans have spoken: Slayer comes out on top in readers' polls”originalet”Tribute to Jeff Hanneman (1964-2013)””Lamb Of God Frontman: We Sound Like A Slayer Rip-Off””BEHEMOTH Frontman Pays Tribute To SLAYER's JEFF HANNEMAN””Slayer, Hatebreed Doing Double Duty On This Year's Ozzfest””System of a Down””Lacuna Coil’s Andrea Ferro Talks Influences, Skateboarding, Band Origins + More””Slayer - Reign in Blood””Into The Lungs of Hell””Slayer rules - en utställning om fans””Slayer and Their Fans Slashed Through a No-Holds-Barred Night at Gas Monkey””Home””Slayer””Gold & Platinum - The Big 4 Live from Sofia, Bulgaria””Exclusive! Interview With Slayer Guitarist Kerry King””2008-02-23: Wiltern, Los Angeles, CA, USA””Slayer's Kerry King To Perform With Megadeth Tonight! - Oct. 21, 2010”originalet”Dave Lombardo - Biography”Slayer Case DismissedArkiveradUltimate Classic Rock: Slayer guitarist Jeff Hanneman dead at 49.”Slayer: "We could never do any thing like Some Kind Of Monster..."””Cannibal Corpse'S Pat O'Brien Will Step In As Slayer'S Guest Guitarist | The Official Slayer Site”originalet”Slayer Wins 'Best Metal' Grammy Award””Slayer Guitarist Jeff Hanneman Dies””Kerrang! Awards 2006 Blog: Kerrang! Hall Of Fame””Kerrang! Awards 2013: Kerrang! Legend”originalet”Metallica, Slayer, Iron Maien Among Winners At Metal Hammer Awards””Metal Hammer Golden Gods Awards””Bullet For My Valentine Booed At Metal Hammer Golden Gods Awards””Metal Storm Awards 2006””Metal Storm Awards 2015””Slayer's Concert History””Slayer - Relationships””Slayer - Releases”Slayers officiella webbplatsSlayer på MusicBrainzOfficiell webbplatsSlayerSlayerr1373445760000 0001 1540 47353068615-5086262726cb13906545x(data)6033143kn20030215029