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1/120 Akula

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  • #16
    Mloo123,
    ever considered using magnets to couple the servos and control rods together. The flat surface of the box lends itself to that.Click image for larger version

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    Make it simple, make strong, make it work!

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    • #17
      This one is closer to the real Akula submarine...

      Akula submarine R/C model | 3D CAD Model Library | GrabCAD

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      • #18
        Originally posted by redboat219 View Post
        Mloo123,
        ever considered using magnets to couple the servos and control rods together. The flat surface of the box lends itself to that.Click image for larger version

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        Hi redboat219,

        Nice to see you here too. That magnet couple system looks sweet, especially if using them for forward or sail panes. Thanks for the tip!

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        • #19
          Great Work!

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          • #20
            Wheel weights just in. Will properly trim boat this weekend. Click image for larger version

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            • #21
              Now that is a nice running place.
              https://youtu.be/I4fdnqWl6EI
              Of the 40,000 men who served on German submarines, 30,000 never returned.”

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              • #22
                Some progress...

                Epoxy the rubber band hooks to the hull sides using home diy cable holder hooks cut into halves.

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                Last edited by mloo123; 04-28-2022, 09:14 AM.

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                • #23
                  Originally posted by mloo123 View Post
                  Some progress...

                  Epoxy the rubber band hooks to the hull sides using home diy cable holder hooks cut into halves.

                  Click image for larger version

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                  Absolutely brilliant idea.

                  Btw, may I know the size of the boxes you're using.
                  thanks.
                  Make it simple, make strong, make it work!

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                  • #24
                    Just wondering how waterproof these boxes are for our use? Have you tested them to say a bottom of a 9' pool? I'm asking this for I would assume they were designed to keep rainwater out at atmospheric pressure.

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                    • #25
                      Originally posted by redboat219 View Post

                      Absolutely brilliant idea.

                      Btw, may I know the size of the boxes you're using.
                      thanks.
                      Size used W80mm x H70mm. Length for the main compartment is 180mm. Length is not critical but W & H depending on how wide the beam of the sub. In this case the beam is 104mm ID.

                      However, I find it's tough to get any smaller boxes than these as space within will be very constrain for any smaller sized subs.

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                      • #26
                        Originally posted by vital.spark View Post
                        Just wondering how waterproof these boxes are for our use? Have you tested them to say a bottom of a 9' pool? I'm asking this for I would assume they were designed to keep rainwater out at atmospheric pressure.
                        You are correct. These boxes were designed for atmospheric pressure which retards water intrusions with water jet spray at certain levels under it's IP ratings.

                        I don't have the luxury of having my own pool, plus any public pools or water feature landscapes available in my country that allows us to enjoy this hobby openly, thus will only sail them in small ponds or reservoirs in which will not submerged fully, maybe just till periscope depths to keep track of them. Hence at this depths these boxes were still be able to keep water out under it's own seals which I have tested with my industrial plastic container at home.

                        Hence I cannot comment whether can they withstand pressure at 9' under.

                        However, the main shafts seals have yet been tested for it's durability, but will find out soon after more running tests at home.
                        Last edited by mloo123; 04-29-2022, 07:12 AM.

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                        • #27
                          The utility boxes typically use a foam gasket. Replacing that with rubber or by smearing silicone in to make your own gasket will significantly increase the amount of pressure they'd be able to withstand. Based on my experience with them and my own gut instinct. I'd bet you could get to 30ft or more without an issue with the gasket mod.

                          Bob

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                          • #28
                            I know what you mean. Thanks for the tip!

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                            • #29
                              What happened to the photos? Anyway, congratulations with the tank test.
                              Make it simple, make strong, make it work!

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                              • #30
                                Thanks for the congrats.

                                As for the photos, im not sure why it's blocked by the moderator somehow during in the middle of editing some posts...

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