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Something to do while bored at work

Scheduled Pinned Locked Moved The Lounge
databaseadobe
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  • M Munchies_Matt

    I would expect that, the bearing is simpler.

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    CodeWraith
    wrote on last edited by
    #8

    The big question is: Would it work if you did it the other way around? Modifying it to let the main rotor turn counterclockwise instead of clockwise would require reolacing all gears and the rotor main head. Simply turning around the tail rotor on the boom is much easier, including reversing its turning direction. Bur will it be effective this way?

    I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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    • T The pompey

      Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.

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      L Offline
      Lost User
      wrote on last edited by
      #9

      My foot doesn't move, maybe it's only for people that don't exercise? anyway if I'm bored at work [if not already at home I go home and] I just do something else.

      Signature ready for installation. Please Reboot now.

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      • T The pompey

        Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.

        Kornfeld Eliyahu PeterK Offline
        Kornfeld Eliyahu PeterK Offline
        Kornfeld Eliyahu Peter
        wrote on last edited by
        #10

        It is interesting it does work for different sides, but not for the same...

        "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge". Stephen Hawking, 1942- 2018

        "It never ceases to amaze me that a spacecraft launched in 1977 can be fixed remotely from Earth." ― Brian Cox

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        • C CodeWraith

          The big question is: Would it work if you did it the other way around? Modifying it to let the main rotor turn counterclockwise instead of clockwise would require reolacing all gears and the rotor main head. Simply turning around the tail rotor on the boom is much easier, including reversing its turning direction. Bur will it be effective this way?

          I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

          M Offline
          M Offline
          Munchies_Matt
          wrote on last edited by
          #11

          Of course not, the airfoil shape is wrong. :)

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          • L Lost User

            My foot doesn't move, maybe it's only for people that don't exercise? anyway if I'm bored at work [if not already at home I go home and] I just do something else.

            Signature ready for installation. Please Reboot now.

            T Offline
            T Offline
            The pompey
            wrote on last edited by
            #12

            Lopatir wrote:

            My foot doesn't move, maybe it's only for people that don't exercise?

            You're just doing it wrong.

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            • M Munchies_Matt

              Of course not, the airfoil shape is wrong. :)

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              CodeWraith
              wrote on last edited by
              #13

              I know that this works from someone who accidentally installed them wrong. He said that they just made an odd noise, but they did their job.

              I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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              • C CodeWraith

                I know that this works from someone who accidentally installed them wrong. He said that they just made an odd noise, but they did their job.

                I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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                Munchies_Matt
                wrote on last edited by
                #14

                The aerofoil running backwards isnt going to produce lift as well as running forwards, so 'did their job; is highly questionable.

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                • M Munchies_Matt

                  The aerofoil running backwards isnt going to produce lift as well as running forwards, so 'did their job; is highly questionable.

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                  CodeWraith
                  wrote on last edited by
                  #15

                  They have a symmetric crossection and collective pitch, including negative pitch. That's not so questionable and the helicopter completed it's flight and landed safely. Not so questionable after all. That model is now sitting on my microwave at home and I have been flying it for years after this little mishap of the previous owner.

                  I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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                  • C CodeWraith

                    They have a symmetric crossection and collective pitch, including negative pitch. That's not so questionable and the helicopter completed it's flight and landed safely. Not so questionable after all. That model is now sitting on my microwave at home and I have been flying it for years after this little mishap of the previous owner.

                    I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

                    M Offline
                    M Offline
                    Munchies_Matt
                    wrote on last edited by
                    #16

                    It isnt the symetry, it is the tear drop shape. Running it pointy edhe first is not going to produce the same lift.

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                    • T The pompey

                      Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.

                      L Offline
                      L Offline
                      Leng Vang
                      wrote on last edited by
                      #17

                      Bored you say? Never heard of that word around here. The other "B" word is often heard.

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                      • M Munchies_Matt

                        It isnt the symetry, it is the tear drop shape. Running it pointy edhe first is not going to produce the same lift.

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                        CodeWraith
                        wrote on last edited by
                        #18

                        Not the same lift, but obviously still enough. Obviously some energy was wasted, producing the strange howling sound. And you don't need the teardrop shape. That's an old myth that should have died long ago. Otherwise, how else could paper airplanes, very simple wooden gliders[^] or this thing[^] fly?

                        I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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                        • C CodeWraith

                          Not the same lift, but obviously still enough. Obviously some energy was wasted, producing the strange howling sound. And you don't need the teardrop shape. That's an old myth that should have died long ago. Otherwise, how else could paper airplanes, very simple wooden gliders[^] or this thing[^] fly?

                          I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

                          M Offline
                          M Offline
                          Munchies_Matt
                          wrote on last edited by
                          #19

                          Well yes, the drag from boundary layer separation off the steep back surface will destroy the effectiveness of the aerofoil, as well as increase drag. The only 'lift' will come from the angle of attack.

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                          • M Munchies_Matt

                            Well yes, the drag from boundary layer separation off the steep back surface will destroy the effectiveness of the aerofoil, as well as increase drag. The only 'lift' will come from the angle of attack.

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                            CodeWraith
                            wrote on last edited by
                            #20

                            Correct, most of it does anyway. That's what all the collective and cyclic pitch stuff is all about: The angle of attack.

                            I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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                            • C CodeWraith

                              Correct, most of it does anyway. That's what all the collective and cyclic pitch stuff is all about: The angle of attack.

                              I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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                              M Offline
                              Munchies_Matt
                              wrote on last edited by
                              #21

                              Well, most of an the angle of attack on a symetric foil is just to present the foil as an asymmetric one to the airflow and hence get a pressure drop in line with Bernoulis theorem. Of course you do get additional lift from increasing the angle of attack beyond that because of the downward movement of air due to that angle, and it is considerable, when used, but also expensive in terms of drag, and is of course limited by stalling when the boundary layer breaks away. At that stage the drag is huge, and the lift from Bernoulis theorem gone. This is the state your friend had his rotor in by running the aerofoil backwards. He was using it like a paddle!

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                              • T The pompey

                                Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.

                                W Offline
                                W Offline
                                W Balboos GHB
                                wrote on last edited by
                                #22

                                I can do things like twiddle thumbs, one in each direction as well as a number of Stan Laurel's famous motion notions[^].* So - I thought I'd break this one.   Then I realized what sort of quest upon which I was about to embark. * I can do the enhanced version wherein one claps between knees terminal points. First once, then twice, etc. I am indeed multi-talented.

                                Ravings en masse^

                                "The difference between genius and stupidity is that genius has its limits." - Albert Einstein

                                "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010

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                                • T The pompey

                                  Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.

                                  C Offline
                                  C Offline
                                  charlieg
                                  wrote on last edited by
                                  #23

                                  dude - evil

                                  Charlie Gilley <italic>Stuck in a dysfunctional matrix from which I must escape... "Where liberty dwells, there is my country." B. Franklin, 1783 “They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759

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                                  • T The pompey

                                    Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.

                                    N Offline
                                    N Offline
                                    Nish Nishant
                                    wrote on last edited by
                                    #24

                                    Did not work for me as I kept drawing 9s in the air. :rolleyes:

                                    Nish Nishant Consultant Software Architect Ganymede Software Solutions LLC www.ganymedesoftwaresolutions.com

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                                    • C CodeWraith

                                      The tail rotor also has a collective pitch control, so it's both. It's always installed on the opposite side to where the main rotor's torque would turn the tail, so that it pushes against it. tail rotor on the starboard side -> main rotor turns clockwise Tail rotor on the port side -> main rotor turns counterclockwise

                                      I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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                                      Leo56
                                      wrote on last edited by
                                      #25

                                      Unless it's a Eurocopter and uses a Fenestron tail rotor.... :)

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                                      • L Leo56

                                        Unless it's a Eurocopter and uses a Fenestron tail rotor.... :)

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                                        C Offline
                                        CodeWraith
                                        wrote on last edited by
                                        #26

                                        Leo56 wrote:

                                        Eurocopter

                                        Airbus. They now call themselves Airbus. Just outside the town is this place[^], which also now belongs to Airbus. Fenestrons for models of Airbus Helis are hard to find and usually hard to get. That's why I stick to conventional tail rotors, like the one for the Huey I have been working on for quite a while.

                                        I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

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                                        • T The pompey

                                          Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.

                                          V Offline
                                          V Offline
                                          Vaso Elias
                                          wrote on last edited by
                                          #27

                                          My friend complains that he cannot do it while he is driving!! :doh:

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