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Another ARKMODEL VII Build Blog

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  • #16
    Today I finished up the rudder parts installation using LEGOS gears and brass tubing, brass rod, and brass sheet metal. I realize some will say the plastic gears will not last! Having build MANY LEGO motorized kits, I can tell you from experience they will last!

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    I designed this entire rudder assembly so that it could be completely taken out of the sub if I ever had to replace any of the gears! The brass plate at the top of the mechanism on the first photo is the adjustment nut that will allow me to adjust the tension on the gear drive system. I am going to take the assembly out of the sub tomorrow to do some final finish and clean up work.

    Rob
    "Firemen can stand the heat"

    Comment


    • #17
      Very ingenious.
      Of the 40,000 men who served on German submarines, 30,000 never returned.”

      Comment


      • #18
        Originally posted by Das Boot View Post
        Very ingenious.
        Thanks Casey,

        I love our LEGOS! :-))

        Rob
        "Firemen can stand the heat"

        Comment


        • #19
          Today I finished up the stern section rudder and dive planes controls. I did not use the control linkages that came with the kit. I used gears for the rudder system and replaced the plastic horn for the dive planes
          with solid brass!


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          Everything operates very smooth and will line up perfectly with the 80 mm WTC almost a straight shot from the control horns to the linkage from the WTC...

          Rob
          "Firemen can stand the heat"




          Comment


          • #20
            I found I needed to go back into the rudder assembly and make a change in the center support plate.

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            In order to take the deck on and off the stern screw was attached to the rudder assembly and it made it a real hassle. I cut the support plate back and fabricated a different support plate holder and now it is separate from the deck support screw!

            Rob
            "Firemen can stand the heat"

            Comment


            • #21
              So now I am moving onto the drive shafts for this sub, and again the supplied kit parts are somewhat crap in my opinion. They are using a piece of plastic tubing for the shaft bushing, not up to par!

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              I will be using a series of brass tubing to fabricate a more suitable drive shaft assembly!

              Rob
              "Firemen can stand the heat"

              Comment


              • #22
                I spent the day finishing up the stern section of my Arkmodel! I do have two brass props for this boat, but the ones that came with the kit are not to bad. They have threaded brass inserts and good heavy solid blades!

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                Next I will start work on the bow section! The bow planes and the torpedo doors. I will do the bow planes just like the stern planes, using brass rod and control rod. I will make the torpedo doors open and close, but I will not do any servo operation at this point, but maybe sometime in the future.

                Rob
                "Firemen can stand the heat"
                Last edited by rwtdiver; 03-22-2022, 09:21 PM.

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                • #23
                  I made some progress on the bow of the Type V!! today!

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                  I 3D printed a set of torpedo tubes for the bow section. I have the doors hinged so that will open and close. I may set them up to function in the future. I am also going to 3D print some simulated torpedo's to insert just inside the front of the tubes for effect.

                  Rob
                  "Firemen can stand the heat"

                  Comment


                  • #24
                    This is how I have done torpedo shutters in the past. They work very well.

                    Bob
                    Attached Files

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                    • #25
                      Originally posted by SubHuman View Post
                      This is how I have done torpedo shutters in the past. They work very well.

                      Bob
                      Thanks Bob,

                      The photos are a great help! I was not sure what I was going to do, but that looks like a great set up for one of the switches on my VEX radio! :-))

                      Thank again for the help!

                      Rob
                      "Firemen can stand the heat"

                      Comment


                      • #26
                        I finished up the simulated torpedo system in the bow!

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                        I 3D printed the simulated torpedo's, and then slapped on a little red acrylic paint on the heads and the CA'd to the tubes. Touched it all up with grey acrylic paint At this point I am going to fabricate system to open and close the outer doors. Bob Martin submitted some drawings as to how he fabricated the linkages to achieve this function. Not sure yet! I may just add an additional servo to operate the outer doors!!!

                        Rob
                        "Firemen can stand the heat"
                        Attached Files

                        Comment


                        • #27
                          Today I fabricate the control linkages for the stern dive planes, rudders, and the bow dive planes!

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                          Rob
                          "Firemen can stand the heat"



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                          • #28
                            Now that I have the hull and the deck sections complete, and all the control linkages complete and operational, it's time to move on to the WTC!

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                            I did have a problem with one of the servos that came with the WTC! After running a full check on the servos (which I always do) before installation and hooking up the arms to the control linkages. After running both servos with my servo tester, one of them stopped working completely. These little 9g servos are a dime a dozen and I have a good inventory on hand just for this type of situation. I replaced the servo, and everything is working great!

                            My next project will be to install a servo in the battery compartment end cap for the forward bow dive planes. Bob Martin had a YouTube out that shows how he did this very installation.

                            Rob
                            "Firemen can stand the heat"

                            Comment


                            • #29
                              Getting ready to start the wiring process and I have a question about the two motor system on the 80mm WTC!

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                              I believe my wiring diagram is correct for counter rotating motors?! Not sure totally so would someone correct me if I am wrong!

                              Thank you,

                              Rob
                              "Firemen can stand the heat"

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                              • #30
                                I would go with a higher capacity ESC, Viper Marine strikes my fancy.

                                David
                                Resident Luddite

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