Would the plane take off?

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  • beam
    The end.
    • May 2001
    • 2036

    #121
    Originally posted by Army
    THIS JUST IN!!!!

    I have no idea why it didn't dawn on me before!!!

    Float planes, lacking wheels, quite often land on MOVING RIVERS. The plane...WITHOUT WHEELS AND AGAINST THE CURRENT....still flies.
    I kid you not...I came on here to post that very thing!!

    Good call Army.
    <---Should be banned for circumventing the cuss filter.

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    • slateman
      Registered User
      • Oct 2001
      • 1346

      #122
      Originally posted by SCpoloRicker
      Originally posted by maxama10
      yup




      Oh and I asked my uncle, who is a pilot in the Air Force and has a Masters degree in aerodynamics, and he said

      No. The plane will not take off. Only the wheels are moving. No airflow (other than the wind) is going over the wings to generate lift. Without airflow over the wings, lift cannot be generated and thusly the plane cannot take off. If I understand the question correctly, the wheels of the 747 will rotate as the treadmilling runway moves underneath the jet but now airflow is going over the wings.
      BrockSampson "I see dead people..."



      and once I see them, I make sweet, sweet love...

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      • Target Practice
        irc.zirc.org:6667 = chat!
        • Nov 2003
        • 3180

        #123
        Originally posted by slateman
        Oh and I asked my uncle, who is a pilot in the Air Force and has a Masters degree in aerodynamics, and he said
        You are not explaining the quesiton correctly.

        I'll have to draw a picture.


        "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin slitting throats." --Henry Louis Mencken.

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        • Warewolf50
          The evil monkey
          • Apr 2002
          • 1444

          #124
          did anyone actually read the link on like the 2nd page a guy put a toy plane on a treadmill and it took off wiht the treadmill running ad full spead.

          mcveighr--You think caffeine rocks you should try cocaine.

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          • Army
            Moderator of DOOOOOOOOMMM!

            • Oct 2000
            • 5785

            #125
            IT'S A TRICK QUESTION! IT WAS MEANT TO CONFUSE YOU ABOUT THE WHEELS AND CONVEYOR. THEY HAVE NOTHING TO DO WITH THE FORWARD MOTION OF AN EXTERNALLY POWERED AIRCRAFT. THE 747 HAS NO CHOICE BUT TO ACCELERATE TO FLIGHT SPEED, REGARDLESS OF HOW FAST THE CONVEYOR OR WHEELS ARE TURNING!!!

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            • Target Practice
              irc.zirc.org:6667 = chat!
              • Nov 2003
              • 3180

              #126
              Originally posted by Army
              IT'S A TRICK QUESTION! IT WAS MEANT TO CONFUSE YOU ABOUT THE WHEELS AND CONVEYOR. THEY HAVE NOTHING TO DO WITH THE FORWARD MOTION OF AN EXTERNALLY POWERED AIRCRAFT. THE 747 HAS NO CHOICE BUT TO ACCELERATE TO FLIGHT SPEED, REGARDLESS OF HOW FAST THE CONVEYOR OR WHEELS ARE TURNING!!!
              quotin' dis


              "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin slitting throats." --Henry Louis Mencken.

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              • Army
                Moderator of DOOOOOOOOMMM!

                • Oct 2000
                • 5785

                #127
                Oops...did I shout that?







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                • SuiciDal Sn Y p ER
                  Registered User
                  • Apr 2003
                  • 3814

                  #128
                  does anyone feel somewhat smarter by understanding the physics of this? or am i just learning useless information?
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                  • Kai

                    #129
                    Originally posted by slateman




                    Oh and I asked my uncle, who is a pilot in the Air Force and has a Masters degree in aerodynamics, and he said

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                    • billybob_81067
                      A.O.'s official Redneck
                      • Jan 2001
                      • 1682

                      #130
                      Originally posted by Target Practice
                      I'll have to draw a picture.
                      Will this one suffice?

                      My Feedback

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                      • Vex
                        Superiorly Inferior
                        • Jun 2001
                        • 1871

                        #131
                        Originally posted by slateman
                        Oh and I asked my uncle, who is a pilot in the Air Force and has a Masters degree in aerodynamics, and he said
                        Well, my best friend happens to also be a pilot in the Air Force (F-16s, C-130s) and I work on C-130 simulators, and we both disagree with your uncle. It is obvious that he did not understand the question.

                        If you've never been on an airplane, it's difficult to imagine the amount of thrust that they put out. Even for a turbo-prop like a C-130.

                        Instead of a 747 in the example, picture a C-5 Galaxy. If you've ever seen one of those bad boys take off, I guarantee that you were amazed at how in the hell it even made it off the ground.
                        "Otaeri wa doko desu ka?"
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                        • zaqwert6
                          Nobody Special
                          • Aug 2003
                          • 108

                          #132
                          Hmmm...

                          5 pages and the complete explaination and obvious, unneccessary (so it would seem) answer was given in the link on Page 2.

                          And AO is supposed to be the 'smarter' Forum.

                          Why does anyone think that free spinning wheels, with no mechanical connection to an airplane will slow down it's forward excelleration? The plane simply fires the engines and moves forward at normal take off speed...assuming the brakes aren't on of course. The conveyor has no impact on it's forward speed what so ever.

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                          • Lohman446
                            Useful posts: 7
                            • Jun 2003
                            • 9315

                            #133
                            Originally posted by zaqwert6
                            Hmmm...

                            5 pages and the complete explaination and obvious, unneccessary (so it would seem) answer was given in the link on Page 2.

                            And AO is supposed to be the 'smarter' Forum.

                            Why does anyone think that free spinning wheels, with no mechanical connection to an airplane will slow down it's forward excelleration? The plane simply fires the engines and moves forward at normal take off speed...assuming the brakes aren't on of course. The conveyor has no impact on it's forward speed what so ever.
                            It was a pretty hard answer to grasp, even when explained and it took several examples for me to fully "get" it.

                            /Then again, I could be slow.
                            "Unless someone like you cares a whole awful lot, nothing is going to get better. Its not" - Dr Suess

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                            • jdev
                              yes, I run akaowners.org
                              • Apr 2003
                              • 2030

                              #134
                              army,

                              I re-read after I posted it and debated it a bit with rob. I understand the explanation that you and miscue both gave, but I guess I am having a hard time seeing it in my head. I guess the only reasonable explanation is to call the myth busters and let them hash it out.

                              I would love to see a giant conveyor belt with the 747 on it. the potential for disaster just makes me tingle inside.
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                              • bleachit
                                Conturbo et Ledo
                                • May 2003
                                • 1410

                                #135
                                Originally posted by Lohman446
                                It was a pretty hard answer to grasp, even when explained and it took several examples for me to fully "get" it.

                                be that as it may, there was a link 3 pages ago as to why it would fly, and folk still argued that it wouldnt. I believe that was the of zaqwert6
                                "Great stories! See everyone, just buy a Sydarm and become a paintball superstar!! "
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