!/144 Trumpeter Kilo help

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  • Bellboy1
    Ensign
    • Apr 2022
    • 8

    #16
    Thank you! I will drill and tap the hub for a set screw. I did not think about coming in perpendicular to the hub, but it seems obvious now that you pointed it out! I figured there was something I was overlooking. .

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    • He Who Shall Not Be Named
      Moderator
      • Aug 2008
      • 12253

      #17
      Originally posted by Bellboy1
      Thank you! I will drill and tap for a set screw on the kilo. I didn't think about going in perpendicular to the hub.
      Click image for larger version

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      Who is John Galt?

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      • redboat219
        Admiral
        • Dec 2008
        • 2735

        #18
        Set screw? I just CAed mine together. First attached the vortex attenuator to the end of the 1/16 shaft followed by the main propeller hub.

        Prop coated with epoxy primer. Will be sanded smooth. Click image for larger version

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        Make it simple, make strong, make it work!

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        • Sodamaexchen
          Lieutenant, Junior Grade
          • Jan 2023
          • 11

          #19
          after i have not found the answer with google..... whats the volume of the ballast tank ?

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          • redboat219
            Admiral
            • Dec 2008
            • 2735

            #20
            Originally posted by Sodamaexchen
            after i have not found the answer with google..... whats the volume of the ballast tank ?
            To determine the volume of the ballast tank needed for a particular boat you must determine the weight of all the structures that are above the waterline when it is surfaces. For the Trumpeter Kilo this is easy because the hull is divided at the waterline.

            Water has a density of 1gm per milliliter meaning 10 ml of water weighs 10gms. Styrene has a specific gravity which is more or less equal to water which is 1.


            Weight of hull = weight of water
            weight water = volume of water
            volume of water = volume of ballast tank.
            Last edited by redboat219; 01-19-2023, 01:59 AM.
            Make it simple, make strong, make it work!

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            • Sodamaexchen
              Lieutenant, Junior Grade
              • Jan 2023
              • 11

              #21
              Thanks for the reply and the detailed answer.

              Maybe i should have written why i am asking.
              I know how to determine the volume if i have the model.
              But i wanted to do some engineering before ordering the parts and as you already build the boat i thougt you could give an answer like: approx. XX ml

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              • redboat219
                Admiral
                • Dec 2008
                • 2735

                #22
                Approximately CXV ml
                Make it simple, make strong, make it work!

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                • Sodamaexchen
                  Lieutenant, Junior Grade
                  • Jan 2023
                  • 11

                  #23
                  Thanks !

                  My guess was around 100 ml, so i got close to a good number.
                  Last edited by Sodamaexchen; 01-19-2023, 07:44 AM.

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                  • redboat219
                    Admiral
                    • Dec 2008
                    • 2735

                    #24
                    Click image for larger version

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ID:	168774 found this in Caswell's old site using Wayback Machine.
                    Make it simple, make strong, make it work!

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                    • Sodamaexchen
                      Lieutenant, Junior Grade
                      • Jan 2023
                      • 11

                      #25
                      Thanks again!
                      also for bringing the wayback machine into play, it is such a powerful tool for researching old stuff.

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