J2 Conversion

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  • bigdave
    Junior Member
    • Feb 2003
    • 3596

    #1

    J2 Conversion

    If this works it will be amazing. Ha!!
    You will have to blame that Rick Teskey guy for getting me going again.
    The plan is to make a Mobius J2 model operational.
    After thinking about a plan of attack I have decided to try and power my J2 using a Voith Schneider drive system made by Graupner.
    This model is not available anymore as Graupner has switched to a more powerful and expensive version.
    I picked this one up on ebay.
    For those not familiar with the Voith drives they are kind of like a helicopter for the water.
    The blades sticking down from the bottom rotate in a circular motion and normally track at zero pitch.
    They are shaped like little wings and change pitch like helicopter blades would by using a swash plate inside of the drive.
    This will cause the blades to bite into the water and move the drive in any direction.
    Literally any direction up push your transmitter stick the boat will go.
    I am sure my explanation is not the best so you can Google the drive and see more on how they work if you like.
    My plan is to mount the drive in the center of the J2 with the blades sticking out the bottom through the thrust thingy (sorry Rick) that sticks down from the bottom of the model.
    You can see from the photos the model is huge and will make a great display as well as hopefully a good driver.
    I have not really worked out much else yet about how I will do it and may have some trouble getting the drive to seal.
    As it was not meant for underwater use.
    Should be fun project though.
    Thanks Rick!!! BD.







    sigpic"Eat your pudding Mr Land"
    "I ain't sure it's pudden" 20K
  • Rick Teskey
    SubCommittee Member
    • Feb 2003
    • 217

    #2
    Re: J2 Conversion

    Hi Dave
    I have a few questions and comments.
    First, great too see another crazy idea /plan brewing, always entertaining.
    As far as the voith drive, it looks o.k for a pool runner but if you take it too the pond I think you have a weed catcher ala crazy ivan, think spaggetti on a fork unless you plan on using it as a weed wacker!
    Second, how do you plan on diving it? adding external plexi glass dive planes? or by ballast only?
    I know , you have not thought that far ..yet.
    I think the J2 is such a simple but elegant shape , it is hard too come up with somthing that does not make it look ugly but still functional.
    Re think and as I showed pumps or props maybe a swivel / pivot nozzel on each side of the circumfrence.
    A couple of props sticking out the back end with a dive plane?
    The rate projector thingy on the bottom could have 4 compus points ejection ports for forward and reverse as well as left and right for direction .
    Do not give up use or ignor what I say as I am slightly off plumb myself
    Rick

    Comment

    • bigdave
      Junior Member
      • Feb 2003
      • 3596

      #3
      Re: J2 Conversion

      Rick Rick Rick!!!
      Don't you think in my infinite wisdom ( ) I would have accounted for the problems you suggest

      OK Rick I can hear you laughing.
      I plan to dive using only ballast. Most likely a small bladder as I don't care if it lifts out of the water.
      Just that it floats and submerges.
      I am thinking a small bow thruster (or stern) for changing the direction of rotation. (Rudder)
      And I am not much worried about the Voith blades as I guess it is not a problem when used in tug boats .
      Plus I am thinking of having most of the blade inside of the thrust thingy and only a small portion extending below the bottom.
      It should act as kind of a weed guard.
      But as I will most likely run it in a pool so I can see it I would say that is a moot point.

      But as you know I accept all constructive criticism my slightly off plumb friend. B (Fully off plumb) D.
      sigpic"Eat your pudding Mr Land"
      "I ain't sure it's pudden" 20K

      Comment

      • Rick Teskey
        SubCommittee Member
        • Feb 2003
        • 217

        #4
        Re: J2 Conversion

        Small bladder... bicycle tire tube should bring it up and down and be stable all around ,maybe a 16 incher?
        Any thoughts on the landing gear? the wells and frame work does have possibilities ,think syringe as a piston and a air or water pump , air would work on the table or a 3 cable drive off a winch servo .
        A small water jet stream at the outer edge one fasing forward on one side and one fasing aft on the other would spin on a dine like a water wheel or the cousteau diving saucer
        More dumb ideas and smart ass comments too follow... LMAOROTF!!!
        Rick
        P.S Do tugs submerge?

        Comment

        • bigdave
          Junior Member
          • Feb 2003
          • 3596

          #5
          Re: J2 Conversion

          Kevin's does!! BD.
          sigpic"Eat your pudding Mr Land"
          "I ain't sure it's pudden" 20K

          Comment

          • crazy ivan
            SubCommittee Member
            • Feb 2003
            • 659

            #6
            Re: J2 Conversion

            ...if you take it too the pond I think you have a weed catcher ala crazy ivan.
            Rick
            Hey, I resemble that remark!
            Hi Rick!
            sigpic
            "There are the assassins, the dealers in death. I am the Avenger!" - Captain Nemo

            -George Protchenko

            Comment

            • Rogue Sub
              Junior Member
              • Jul 2006
              • 1724

              #7
              Re: J2 Conversion

              Not funny dave

              Comment

              • bigdave
                Junior Member
                • Feb 2003
                • 3596

                #8
                Re: J2 Conversion

                Actually it may have been in bad taste, but it was very funny!!
                I guess you had to be there, O wait!! You were!! Your buddy!! BD.
                sigpic"Eat your pudding Mr Land"
                "I ain't sure it's pudden" 20K

                Comment

                • crazy ivan
                  SubCommittee Member
                  • Feb 2003
                  • 659

                  #9
                  Re: J2 Conversion

                  Sorry Kev, but having seen the whole sad affair, BD speaks true
                  David, how do you keep coming up with this exotic stuff?
                  sigpic
                  "There are the assassins, the dealers in death. I am the Avenger!" - Captain Nemo

                  -George Protchenko

                  Comment

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