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Rudder Actuation in close tolerance sterns, i.e. Type XXI, TXXIII style?

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  • Rudder Actuation in close tolerance sterns, i.e. Type XXI, TXXIII style?

    Might the fellows having built similar to the above in 1/72 scale, or smaller, share how they accomplished reliable rudder actuation in their projects? Pictures would be wonderful!! I have a 1/72 Foxtrot project going and am in need of a good system to make the turny-thing work! I did the work in a 1/35 Bronco Type XXIII, but there's a whole lot more room in that beast.

    TIA, Happy 4th!!

    Bill

  • #2
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    Resident Luddite

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    • #3
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      Make it simple, make strong, make it work!

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      • #4
        Thank you!

        Bill

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        • #5
          Bill,

          I have an idea on paper for using a robotics timing belt and pulleys. I also have a stainless chain from some old school radio gear that may work if I find the right size sprockets.

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          • #6
            Cool, Tim! I have a bag full of plastic gears that was amongst Bob hoard of goodies. Something will work to make this happen!!

            Bill

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            • #7
              Originally posted by wlambing View Post
              Cool, Tim! I have a bag full of plastic gears that was amongst Bob hoard of goodies. Something will work to make this happen!!

              Bill
              You ham-fisted Idiot!

              Just throw a horn in there and be done with it!

              You Complexity Worshiping, knuckle-dragging A-Ganger types frost my ass! Who brought you up, anyway... Rub Goldberg???

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              David
              The Intolerant
              Resident Luddite

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              • #8
                Hey! Hey! Hey! I know exactly where these flat-tipped, stubby meat-grabbin' digits can go and what they can do! Had enough trouble getting a horn to work in the Type XXIII. I also know how much fun it is tryin' to use hot-metal glue to make teenie-weenie little horns without removing my fingerprints by accident!!! ;)

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                • #9
                  Originally posted by wlambing View Post
                  Hey! Hey! Hey! I know exactly where these flat-tipped, stubby meat-grabbin' digits can go and what they can do! Had enough trouble getting a horn to work in the Type XXIII. I also know how much fun it is tryin' to use hot-metal glue to make teenie-weenie little horns without removing my fingerprints by accident!!! ;)
                  https://youtu.be/nwGY2o1Po38
                  Resident Luddite

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                  • #10
                    Well, now I'm looking for a source for a teenie-tiny rack and pinion set up, suitable for use in only 3/16" of space. The smallest horn I have still will not clear the hull side and pivot the rudder stock (1/16" brass rod). I could cut a slot in the hull, or manufacture "blisters" for each side with a slot underneath for horn arm clearance, but that would destroy the fine lines of this racy looking subject. She's one of the RPM Tech 1/72 Foxtrot hulls, and a production hull that seems to differ greatly from the one HWSNBN built in some areas. Can anyone share a source for really small rack and pinion sets? Such info could be of benefit to us all for actuating little features. TIA.

                    Bill

                    PS- I did look at the Servo R&P Bob has, and it is too big also.
                    Last edited by wlambing; 07-22-2022, 11:01 AM.

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                    • #11
                      I found a small plastic rack and pinion set among some stuff from a friends estate. ID'd the pieces to use and will be making those pieces fit, post haste!

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                      • #12
                        You could draw a rack and pinion out in cad then have it 3d printed in nylon.

                        Or use a pair of small bevel gears, then you can the control shaft can use a rotary seal.
                        Time to DIVE IN! https://www.facebook.com/groups/133360626703083/

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