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  • Originally posted by bwi 971 View Post

    Absorbing big time here

    Why do you some
    times use RTV cilicone mandrels David?

    Grtz,
    Bart
    To produce bores of rough diameter. Final boring is done post casting with a drill bit.

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

    Comment


    • Originally posted by He Who Shall Not Be Named View Post

      During the stippling of the masking clay up tight around the master I use water to keep the oil bearing clay from sticking to the bristles of the brush.

      About fifteen years ago I switched from BJB-810 polyurethane casting resin to Alumilite RS-3 polyurethane casting resin. Alumilite recently changed the color of their labels, maybe that's what you keyed on, Tom.

      David
      Thank you! Yes it was the labeling that threw me off.
      If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

      Comment


      • Originally posted by He Who Shall Not Be Named View Post















        Hi David,

        Just a quick "SHOUT OUT" to you to thank you for manufacturing the Skipjack fitting kits!

        I ordered mine today!! That kit is worth every penny! $99.00 quite frankly, I would have paid a lot more for it!

        Thanks again for all your effort to get these kits in production, and for Bob (Nautilus Drydocks) for having them to purchase!

        Rob

        "Firemen can stand the heat"

        Comment


        • Originally posted by rwtdiver View Post

          Hi David,

          Just a quick "SHOUT OUT" to you to thank you for manufacturing the Skipjack fitting kits!

          I ordered mine today!! That kit is worth every penny! $99.00 quite frankly, I would have paid a lot more for it!

          Thanks again for all your effort to get these kits in production, and for Bob (Nautilus Drydocks) for having them to purchase!

          Rob

          "Firemen can stand the heat"
          You made my day, Rob.

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

          Comment

























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

            Comment


            • Why twin pumps?
              colour me curious
              thank you

              Comment


              • Originally posted by Rick Teskey View Post
                Why twin pumps?
                colour me curious
                thank you
                This particular MSD featured a 3.75" diameter ballast tank of 12" length. The two LPB's working in parallel will blow the tank dry in a reasonably short period of time.

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

                Comment


                • David,
                  ‘In the photo where the heat gun is pointing to the tube and end cap.....what is going on there?
                  peace,
                  tom
                  If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

                  Comment


                  • Originally posted by trout View Post
                    David,
                    ‘In the photo where the heat gun is pointing to the tube and end cap.....what is going on there?
                    peace,
                    tom
                    Over time the silicon grease used to lubricate the O-rings acts like glue, making cylinder removal a problem. However, if you heat the Lexan cylinder over the O-rings, the union between cylinder and O-rings is easily slide apart.
                    "... well, that takes care of Jorgenson's theory!"

                    Comment


                    • Thank you for clarification, I thought one was for snorkel one for internal air source

                      Comment


                      • Thank you David!
                        If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

                        Comment


                        • Originally posted by Rick Teskey View Post
                          Thank you for clarification, I thought one was for snorkel one for internal air source
                          No, just to shorten the ballast tank discharge time. As configured in the pictures things are plumbed in the snort mode. Parallel a safety float-valve in the induction side of the plumbing, and add a snorkel, and it'll be in the SAS mode. Eazy Piezy.

                          You trouble-makers coming to the big SubFest, or not?

                          (note to self: What was I thinking?!!!... must notify homeland security, the Justice League, the Avengers, and ICE to deal with Canadian's before they bust through our northern boarder).

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

                          Comment


                          • David,
                            What do you cut your polycarbonate tubes with?
                            Peace,
                            Tom
                            If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

                            Comment


                            • Originally posted by trout View Post
                              David,
                              What do you cut your polycarbonate tubes with?
                              Peace,
                              Tom
                              A big industrial cut-off wheel. I fine-tune the edges on a belt-sander outfitted with a perpendicular guide fixture.

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

                              Comment


                              • You are safe so potus can put away the fire extinguishers .
                                There is talk of keeping the border closed till year end .
                                We will have to wait and see what covid-19 does for us .

                                Comment

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