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Hull as the WTC examples needed

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  • Hull as the WTC examples needed

    Hi!

    I've successfully converted a 1/144 SSN22 to RC, using an acrylic WTC and ballast system, all scratch-built.

    I've failed to convert a 1/72 Revell VIIC. Couldn't find the propper balance between ballast, righting, speed, control. Now I'd like to try using the hull as the WTC, using screws and the lid for tightness. I know it is not the best option but as said, the "classic" way failed here.

    How can I find all the published articles of RC convertions using this approach?

    Thanks!

  • #2
    Crickey! I have to think that the WTC route would be a way better choice for that boat. If you're not going to grab a ready made cylinder specifically designed for the boat, at least have the decency to steal the setup of the stock cylinder in terms of size, ballast tank, etc so that you can build one of your own. It works. Trust me.

    Bob

    Comment


    • #3
      Lots of information at this Japanese site RC blueworld.com.
      http://www.rc-blueworld.com/sakuhin/sakuhin.html

      Wet hull with WTC
      http://www.rc-blueworld.com/dockyard...boat7c_01.html

      Semi dry hull
      http://www.rc-blueworld.com/sakuhin/...boat7-yos.html

      Bulkhead and lid fabrication
      http://blog.livedoor.jp/yoshimon/arc...22792.html?p=3

      click on forward and next buttons to see how Yoshimon went about converting the Type VII.



      Something extra.

      ​​​​​​​Scroll down to see MFR's homemade contour gauge for measuring internal width of hull to aid fabricating internal flange and lid.
      https://www.rcgroups.com/forums/show...lter-V80/page3
      Last edited by redboat219; 07-06-2017, 01:37 PM.
      Make it simple, make strong, make it work!

      Comment


      • #4
        Maybe you could do what Bob suggested, make your own wtc. With your experience with your Seawolf build I'm sure you'll have no problem. Here are the measurements of the 2" subdriver for the Type VII.

        2" outside diameter X 15.25" long,
        Ballast Tank - 5.375"
        Battery Comp. - 3.125"
        Aft Dry Space - 5.625"

        Why not just make a smaller version of your Seawolf WTC.
        Last edited by redboat219; 07-08-2017, 10:30 AM.
        Make it simple, make strong, make it work!

        Comment


        • #5
          Originally posted by redboat219 View Post
          Maybe you could do what Bob suggested, make your own wtc. With your experience with your Seawolf build I'm sure you'll have no problem. Here are the measurements of the 2" subdriver for the Type VII.

          2" outside diameter X 15.25" long,
          Ballast Tank - 5.375"
          Battery Comp. - 3.125"
          Aft Dry Space - 5.625"

          Why not just make a smaller version of your Seawolf WTC.
          Like this:





















          David
          "... well, that takes care of Jorgenson's theory!"

          Comment


          • #6
            What the... No sarcastic remarks?

            Somebody's in a GOOD mood today!
            Make it simple, make strong, make it work!

            Comment


            • #7
              Just noticed how close to center your actuating rod is on the center gear. I'll have to change mine and see if it tightens up the turning radius. Mine has a rather large turning radius for the size of the model.

              Comment


              • #8
                Thanks for sharing the photos Mr. M !

                Comment


                • #9
                  Originally posted by type7 View Post
                  Just noticed how close to center your actuating rod is on the center gear. I'll have to change mine and see if it tightens up the turning radius. Mine has a rather large turning radius for the size of the model.
                  Yup. You want as much rudder throw as possible.

                  David
                  "... well, that takes care of Jorgenson's theory!"

                  Comment


                  • #10
                    David, your SD installation takes advantage of the kit hull's flexibility to be able to slide the 2" SD through the narrow opening under the deck. Avoids making cuts to the hull at cost of working through a narrow opening.

                    Anyway, there was a rather nice technique I saw at another site that involves cutting the hull vertical to ease installation of the WTC.
                    http://subcommittee.com/forum/showth...l-type-7-build

                    I'm just wondering if your SD is compatible with such set up?
                    Last edited by redboat219; 07-11-2017, 11:59 PM.
                    Make it simple, make strong, make it work!

                    Comment


                    • #11
                      Originally posted by redboat219 View Post
                      David, your SD installation takes advantage of the kit hull's flexibility to be able to slide the 2" SD through the narrow opening under the deck. Avoids making cuts to the hull at cost of working through a narrow opening.

                      Anyway, there was a rather nice technique I saw at another site that involves cutting the hull vertical to ease installation of the WTC.
                      http://subcommittee.com/forum/showth...l-type-7-build

                      I'm just wondering if your SD is compatible with such set up?
                      Excellent WIP.

                      Nope.

                      David
                      "... well, that takes care of Jorgenson's theory!"

                      Comment

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