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Jumping Birds and Evolution of Flight

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  • Jumping Birds and Evolution of Flight

    In a previous thread we saw how birds young birds, unable to fly use their nascent wings to climb up branches. Using their wings they create pressure to increase the purchase as they run up nearly vertical structures. A flight-capable wing isn't necessary to provide an evolutionary advantage, nor is

    Once you are up on a branch, a non-flight capable wing still provides advantages while jumping between branches, both in guiding the jump and extending the range of the jump.




    How birds direct impulse to minimize the energetic cost of foraging flight

    Birds frequently hop and fly between tree branches to forage. To determine the mechanical energy trade-offs of their bimodal locomotion, we rewarded four Pacific parrotlets with a seed for flying voluntarily between instrumented perches inside a new aerodynamic force platform. By integrating direct measurements of both leg and wing forces with kinematics in a bimodal long jump and flight model, we discovered that parrotlets direct their leg impulse to minimize the mechanical energy needed to forage over different distances and inclinations. The bimodal locomotion model further shows how even a small lift contribution from a single proto-wingbeat would have significantly lengthened the long jump of foraging arboreal dinosaurs. These avian bimodal locomotion strategies can also help robots traverse cluttered environments more effectively.

  • #2
    Originally posted by noemail001

    edit
    .
    I don't see what your hatred of homosexuals has anything to do with this paper.
    Last edited by CARM Admin; 05-19-17, 01:17 PM.

    Comment


    • #3
      Originally posted by Promethean View Post

      I don't see what your hatred of homosexuals has anything to do with this paper.
      Quote and link to where you imagine I do/did what you falsely claimed. Or eat your attack.
      Mouser Larry Roy: "yippee ki yay"
      “... see the loonies in their cages… are they not witty… how much amusement they afford… ours is a human world, theirs is a bestial world… " Bedlam

      Comment


      • #4
        Originally posted by noemail001 View Post

        Quote and link to where you imagine I do/did what you falsely claimed. Or eat your attack.
        Another question he won't answer:
        what does your hatred of homosexuals have to do with this paper?
        Last edited by Promethean; 05-19-17, 12:55 PM. Reason: verb subject agreement

        Comment


        • #5
          Originally posted by Promethean View Post
          Another question he won't answer:
          what does your hatred of homosexuals have to do with this paper?
          Here ya go:

          https://forums.carm.org/vb5/forum/se...43#post4572043
          Mouser Larry Roy: "yippee ki yay"
          “... see the loonies in their cages… are they not witty… how much amusement they afford… ours is a human world, theirs is a bestial world… " Bedlam

          Comment


          • #6
            Originally posted by noemail001 View Post

            Here ya go:
            A question he won't answer:
            what does your hatred of homosexuals have to do with this paper?


            Comment


            • #7
              Originally posted by Promethean View Post
              A question he won't answer: what does your hatred of homosexuals have to do with this paper?
              Ya?

              https://forums.carm.org/vb5/forum/se...43#post4572043

              and

              https://forums.carm.org/vb5/forum/se...76#post4572376

              ?
              Mouser Larry Roy: "yippee ki yay"
              “... see the loonies in their cages… are they not witty… how much amusement they afford… ours is a human world, theirs is a bestial world… " Bedlam

              Comment


              • #8
                A question he won't answer:
                what does your hatred of homosexuals have to do with this paper?

                Comment


                • #9
                  Originally posted by Promethean View Post
                  In a previous thread we saw how birds young birds, unable to fly use their nascent wings to climb up branches. Using their wings they create pressure to increase the purchase as they run up nearly vertical structures. A flight-capable wing isn't necessary to provide an evolutionary advantage, nor is

                  Once you are up on a branch, a non-flight capable wing still provides advantages while jumping between branches, both in guiding the jump and extending the range of the jump.




                  How birds direct impulse to minimize the energetic cost of foraging flight

                  Birds frequently hop and fly between tree branches to forage. To determine the mechanical energy trade-offs of their bimodal locomotion, we rewarded four Pacific parrotlets with a seed for flying voluntarily between instrumented perches inside a new aerodynamic force platform. By integrating direct measurements of both leg and wing forces with kinematics in a bimodal long jump and flight model, we discovered that parrotlets direct their leg impulse to minimize the mechanical energy needed to forage over different distances and inclinations. The bimodal locomotion model further shows how even a small lift contribution from a single proto-wingbeat would have significantly lengthened the long jump of foraging arboreal dinosaurs. These avian bimodal locomotion strategies can also help robots traverse cluttered environments more effectively.
                  The best clear cut evidence for Intelligent design. Thanks.

                  Birds calculate mechanical energy trade offs and you can't.

                  Well cut and paste takes less energy than writing a thread.

                  Comment


                  • #10
                    Originally posted by Nouveau View Post

                    The best clear cut evidence for Intelligent design. Thanks.

                    Birds calculate mechanical energy trade offs and you can't.

                    Well cut and paste takes less energy than writing a thread.
                    Your wishful thinking is irrelevant.

                    Comment


                    • #11
                      Originally posted by Promethean View Post

                      A question he won't answer:
                      what does your hatred of homosexuals have to do with this paper?
                      ah...
                      https://forums.carm.org/vb5/forum/se...45#post4572445
                      Mouser Larry Roy: "yippee ki yay"
                      “... see the loonies in their cages… are they not witty… how much amusement they afford… ours is a human world, theirs is a bestial world… " Bedlam

                      Comment


                      • #12
                        Originally posted by Promethean View Post
                        Your wishful thinking is irrelevant.
                        OTOH, your wishful thinking is quite relevant when showing your anti-science ways/purposes.
                        Mouser Larry Roy: "yippee ki yay"
                        “... see the loonies in their cages… are they not witty… how much amusement they afford… ours is a human world, theirs is a bestial world… " Bedlam

                        Comment


                        • #13
                          Originally posted by Promethean View Post
                          In a previous thread we saw how birds young birds, unable to fly use their nascent wings to climb up branches. Using their wings they create pressure to increase the purchase as they run up nearly vertical structures. A flight-capable wing isn't necessary to provide an evolutionary advantage, nor is

                          Once you are up on a branch, a non-flight capable wing still provides advantages while jumping between branches, both in guiding the jump and extending the range of the jump.




                          How birds direct impulse to minimize the energetic cost of foraging flight

                          Birds frequently hop and fly between tree branches to forage. To determine the mechanical energy trade-offs of their bimodal locomotion, we rewarded four Pacific parrotlets with a seed for flying voluntarily between instrumented perches inside a new aerodynamic force platform. By integrating direct measurements of both leg and wing forces with kinematics in a bimodal long jump and flight model, we discovered that parrotlets direct their leg impulse to minimize the mechanical energy needed to forage over different distances and inclinations. The bimodal locomotion model further shows how even a small lift contribution from a single proto-wingbeat would have significantly lengthened the long jump of foraging arboreal dinosaurs. These avian bimodal locomotion strategies can also help robots traverse cluttered environments more effectively.
                          Your paper was written by a total idiot.



                          Knows nothing about aeronautics. Because he is not bright enough to be one.

                          The cover of the youtube is the first indication of ignorance. A bird using wings needs a lot of space. Jumping with wings folded does not.

                          The pic shows branches without leaves. I know new plane that needs 3,200' to take off. Birds may need 2' vertical just to flap their wings. 5' lateral to open their wings.

                          Your evo klowns don't know how to ask the correct questions. Maybe one day a human with enough INTeLLIGENT DESIGN can invent a helicopter that can jump with it's landing gear and not use up space required by rotors.

                          Dumb luck didn't create birds.

                          Comment


                          • #14
                            Originally posted by noemail001 View Post

                            ah...
                            still he won't answer:
                            what does your hatred of homosexuals have to do with this paper?

                            Comment


                            • #15
                              Originally posted by noemail001 View Post

                              OTOH, your wishful thinking is quite relevant when showing your anti-science ways/purposes.
                              Trolling won't change the facts and neither will your science illiteracy.

                              Comment

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