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Hms holland 1 build

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  • #61
    Well after working on the motor and drive train until 3:00 AM in the morning, my drive shaft design failed as well as the CHEAP motor!

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    So! As of now this build on hold until I can redesign the stern section and come up with a better motor selection, most likely brushless motor! I am going to back off the Holland build for a while!

    Rob
    "Firemen can stand the heat"

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    • #62
      Back at the Holland again!

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      I am reprinting the stern section of the Holland, and I have purchased a 750KV Brushless motor and a 40 amp bidirectional ESC for the rebuild. The original motors that I was going to use just did not work out! (They were junk)

      I am not going to give up on this build!! :-))

      Rob
      "Firemen can stand the heat"

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      • #63
        Today I finished up the two new stern hull sections to replace the original that would not work out with the original motor.

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        The new 750KW brushless motor will arrive today and I will get it mounted on the end cap and line up with the new stern sections!

        Rob
        "Firemen can stand the heat"
        Attached Files

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        • #64
          The new brushless motor just arrived for the HMS Holland!

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          I will be using this same motor and set up on my SM UC 5 U-BOAT build as well!

          Rob
          "Firemen can stand the heat"

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          • #65
            Really glad to see you persevering on this, Rob. It's a great looking build so far.

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            • #66
              Ditto what Bob said Rob.

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              • #67
                What happened to the waterproof brushed motor?
                Make it simple, make strong, make it work!

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                • #68
                  Originally posted by SubDude View Post
                  Ditto what Bob said Rob.
                  Thank you, Bob and Steve!

                  Yes, I am looking forward to completing this boat and seeing it in the water. It's been somewhat of a struggle, but I will get eventually! :-))
                  Rob
                  "Firemen can stand the heat"

                  Comment


                  • #69
                    Originally posted by redboat219 View Post
                    What happened to the waterproof brushed motor?
                    Hi Romel,

                    The brushless motors worked ok, and they did run well in the water, the main problem was they turned at almost 12,000 RPM at 7.2 volts and really had no torque to them. Oh well live and learn! And it seems like I just have to learn it the hard way (my father always told me that!) :-))

                    I think this new set up is going to work out well!

                    Rob
                    "Firemen can stand the heat"

                    Comment


                    • #70
                      Today's Progress!

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                      I am getting ready to install the new brushless motor. Also fabricated a special tab to be used to secure the top half of the hull to the bottom.

                      NOTE: To those of you still in the work force "Happy Labor Day"

                      Rob
                      "Firemen can stand the heat"

                      Attached Files

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                      • #71
                        More items done today!

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                        I soldered brass washers to the wire ends of the brushless motors. I them bored three holes in the end cap to install 3 4-40 brass screws that I attached the motor wires to.

                        PLEASE NOTE: This is a procedure that I learned from David Merriman, and it works great! :-))

                        The 3 wires from the ESC will now connect to the three brass screws that protrude through and into the inside of the end cap, this makes a very positive link up between the ESC and the brushless motor!

                        Rob
                        "Firemen can stand the heat"

                        Comment


                        • #72
                          Some progress today!

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                          I installed the power wires to my ESC, 3D printed some caps which I then fill with silicone to form a positive seal on all the penetrations through the end cap! After the silicone cures (24 hours) I will add a coat of waterproof seal to the entire inside of the end cap and this will complete this portion of the WTC.

                          Rob
                          "Firemen can stand the heat"

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                          • #73
                            Looks great Rob!

                            Nate

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                            • #74
                              Originally posted by neitosub View Post
                              Looks great Rob!

                              Nate
                              Thanks Nate!

                              It's been somewhat of a struggle and as soon as the silicone cure (tomorrow) I will do a leak test on the end cap and then I can move onto the rest of the control wiring!

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                              • #75
                                I finished up the WTC for the Holland last night!

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                                The above photo shows the change I made as to the Receiver (which I purchased from Nautilus Drydocks) antenna install! I have tested this system out to 40 feet and in the water, and it worked great! I do not run my boats anywhere except my swimming pool. The furthest away I would ever be is 25 feet from the sub. I weighted the cylinder down to 1 foot below the surface stood off 15 feet and it performed great!

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                                I did install a remote on/off system that I purchased from Nautilus Drydocks and it works great on a 3 cell (11.1 volt) battery. I also added a voltage indicator to the power side!

                                Now that the WTC is complete, I will move onto finishing up the stern section of the hull and hooking up the rudder and dive plain linkages!

                                Rob
                                "Firemen can stand the heat"
                                Last edited by rwtdiver; 09-10-2022, 02:57 PM.

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