USS Tucson

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • SSBN659
    Commander
    • Feb 2009
    • 403

    #76
    Still working on countermeasures. Turned my drill press into a milling machine and using my Dremel tool on the pink stuff machined the following,

    Click image for larger version

Name:	Countermeasures Drawing 8563.jpg
Views:	366
Size:	48.4 KB
ID:	170044Click image for larger version

Name:	Pink Foam 8556.jpg
Views:	352
Size:	42.2 KB
ID:	170045Click image for larger version

Name:	Drill Press Mill 8555.jpg
Views:	345
Size:	51.3 KB
ID:	170046

    Click image for larger version

Name:	Second Pass 8558.jpg
Views:	347
Size:	52.7 KB
ID:	170047Click image for larger version

Name:	IMG_8564.jpg
Views:	340
Size:	46.5 KB
ID:	170048

    Still lots more to do but we are taking a break to visit family back East. More when we return.

    Will Rogers
    SSBN659

    Comment

    • SSBN659
      Commander
      • Feb 2009
      • 403

      #77
      Back home now and back to work on Tucson. During our visit I found this model of USS Sturgeon I did years ago. When we moved to Arizona I gave it to our granddaughter and was pleased to see it made the move back East with only minor damage. With a bit of CA the repairs were easy.

      Click image for larger version

Name:	Sturgeon.jpg
Views:	368
Size:	65.4 KB
ID:	170210

      The master for Tucson's countermeasures is probably the most difficult piece of work I've ever done - this is my third attempt and I'm still working on it. Eventually I will get right.

      Click image for larger version

Name:	IMG_8602 copy.jpg
Views:	345
Size:	36.9 KB
ID:	170211Click image for larger version

Name:	IMG_8606 copy.jpg
Views:	350
Size:	52.2 KB
ID:	170212Click image for larger version

Name:	IMG_8615 copy.jpg
Views:	348
Size:	48.8 KB
ID:	170213

      More later.

      Will Rogers
      SSBN659

      Comment

      • He Who Shall Not Be Named
        Moderator
        • Aug 2008
        • 12200

        #78
        looking good, Will.

        David
        Who is John Galt?

        Comment

        • SSBN659
          Commander
          • Feb 2009
          • 403

          #79
          Thanks David.

          I did not get a tight fit (red arrow 1st shot below) and thought it needed fixing, Caulking on the end of the dowel rod pushed out through the brass tube and smoothed off seemed to fix the problem. Hope it holds up for the mold. Still more work to do on countermeasures.
          Click image for larger version

Name:	IMG_8620 copy.jpg
Views:	323
Size:	39.1 KB
ID:	170245Click image for larger version

Name:	IMG_8621 copy.jpg
Views:	307
Size:	57.6 KB
ID:	170246Click image for larger version

Name:	IMG_8622.copy.jpg
Views:	305
Size:	47.7 KB
ID:	170247Click image for larger version

Name:	IMG_8624 copy.jpg
Views:	301
Size:	39.7 KB
ID:	170248

          Will Rogers
          SSBN659

          Comment

          • SSBN659
            Commander
            • Feb 2009
            • 403

            #80
            Almost finished with the countermeasures after 5 tries to get it right. It's in prime now with some of the other masters for inspection. They're mounted on board with hot glue to hold at arms length for priming.

            Click image for larger version

Name:	Masters Primed copy.jpg
Views:	302
Size:	56.1 KB
ID:	170402

            Now working the fwd dive plane master. I will do only one half of the plane then cast 4 pieces all the same size and shape, glue them together top and bottom to form 2 symmetrical planes. That's the plan anyhow, hope I can pull it off.

            Click image for larger version

Name:	Forward Plane 1 copy.jpg
Views:	288
Size:	54.3 KB
ID:	170403Click image for larger version

Name:	Forward Plane 2 copy.jpg
Views:	284
Size:	51.1 KB
ID:	170404Click image for larger version

Name:	Forward Plane 3 copy.jpg
Views:	283
Size:	49.9 KB
ID:	170405

            Will Rogers
            SSBN659



            Comment

            • SSBN659
              Commander
              • Feb 2009
              • 403

              #81
              Work on Tucson continues, slowly. I've been working on the countermeasures, upper and lower rudders, forward and rear planes preparing the masters for molding. Seems like it's sand, prime, inspect, fill, sand prime, inspect - several times until it's as near to right as you can get it.

              I built the mold box using discarded base secured with hot glue. Not all the masters will fit so I'll do more than one mold. Turns out the volume of the box is almost the same as the volume of silicone rubber I bought so I'll have to order more rubber.

              Click image for larger version

Name:	Mold Box copy.jpg
Views:	283
Size:	57.1 KB
ID:	170436

              I'll get there one day, slowly.

              Will Rogers
              SSBN659

              Comment

              • SSBN659
                Commander
                • Feb 2009
                • 403

                #82
                Had some issues with silicone not curing completely so ordered more for another try - it's been several years since I've done any molds. While waiting for more silicone I moved on to scribing the sail.

                I built a light box to trace details from the sail print to a sheet of polystyrene. Then using a scribing needle I cut out each of the details using several different steel templates. I will use this polystyrene template for both sides of the sail. This assumes the details are the same on both sides. They probably are not exactly the same but this works for me.

                The plywood shape screwed to the bottom of the sail gives me a handhold for scribing. Several strips of blue tape hold the template in place. Taping top, middle and bottom allows me to move a strip back to uncover sections while keeping the template in place. There are some places of scribing that I need to do a bit of work on before it's satisfactory but I'll get it.

                Click image for larger version

Name:	Light Box 2 copy.jpg
Views:	251
Size:	42.1 KB
ID:	170572Click image for larger version

Name:	Sail Cutting Template copy.jpg
Views:	252
Size:	49.4 KB
ID:	170573Click image for larger version

Name:	Sail Template copy.jpg
Views:	247
Size:	46.4 KB
ID:	170574Click image for larger version

Name:	Sail Scribing copy.jpg
Views:	245
Size:	57.5 KB
ID:	170575Click image for larger version

Name:	Sail Scribed copy.jpg
Views:	250
Size:	54.3 KB
ID:	170576

                Will Rogers
                SSBN659

                Comment

                • SSBN659
                  Commander
                  • Feb 2009
                  • 403

                  #83
                  Still trying to get satisfactory copies of the masters for the stern planes and countermeasures. It hasn't been easy.

                  Empty yogurt cups with the bottom cut out are my mold boxes for the second try. Hot glue sealed the bottom around the upside-down cup on the base. Once the rubber had cured the cups were turned right side up and the masters removed. I can work with the stern planes copies but the countermeasures are still a problem.

                  Click image for larger version

Name:	Yogurt Cups copy.jpg
Views:	233
Size:	62.4 KB
ID:	170698Click image for larger version

Name:	Yogurt Cups 2 copy.jpg
Views:	221
Size:	59.1 KB
ID:	170699Click image for larger version

Name:	Stern Planes copy.jpg
Views:	216
Size:	59.9 KB
ID:	170700

                  The red arrows mark the problem areas on the countermeasure canister where the rubber didn't fully cure or came loose when I pulled the master from the mold. I will do a two piece rubber mold of the countermeasures for the next try.

                  Click image for larger version

Name:	Countermeasures copy.jpg
Views:	217
Size:	24.8 KB
ID:	170701

                  Any suggestions are welcome.


                  Will Rogers
                  SSBN659

                  Comment

                  • He Who Shall Not Be Named
                    Moderator
                    • Aug 2008
                    • 12200

                    #84
                    Originally posted by SSBN659
                    Still trying to get satisfactory copies of the masters for the stern planes and countermeasures. It hasn't been easy.

                    Empty yogurt cups with the bottom cut out are my mold boxes for the second try. Hot glue sealed the bottom around the upside-down cup on the base. Once the rubber had cured the cups were turned right side up and the masters removed. I can work with the stern planes copies but the countermeasures are still a problem.

                    Click image for larger version

Name:	Yogurt Cups copy.jpg
Views:	233
Size:	62.4 KB
ID:	170698Click image for larger version

Name:	Yogurt Cups 2 copy.jpg
Views:	221
Size:	59.1 KB
ID:	170699Click image for larger version

Name:	Stern Planes copy.jpg
Views:	216
Size:	59.9 KB
ID:	170700

                    The red arrows mark the problem areas on the countermeasure canister where the rubber didn't fully cure or came loose when I pulled the master from the mold. I will do a two piece rubber mold of the countermeasures for the next try.

                    Click image for larger version

Name:	Countermeasures copy.jpg
Views:	217
Size:	24.8 KB
ID:	170701

                    Any suggestions are welcome.


                    Will Rogers
                    SSBN659
                    Clean the counter-measure parts in lacquer thinner and scrub away all uncured area. Rebuild those voids with baking soda and CA adhesive. The nubs can be got at with knife and small rotary tools. Work with what you got, no need to make another tool.

                    Finish it, already!

                    David
                    Who is John Galt?

                    Comment

                    • trout
                      Admiral
                      • Jul 2011
                      • 3539

                      #85
                      I am going to make some statements without knowing if you did or did not do. I spray my parts with a paint that I know will not react with the rubber. The times I have had uncured rubber were from me not mixing well or a reaction with the part (like oils or paint). On holes, I do not let the depth go deep, meaning, I put a stop on the depth of the holes (fill them with a wire or bondo). The reason is if you are pulling the master out, it is too easy to rip fine details or long filaments in an original. Again I do not know if that is what happened with you. Also, putting your mold in a pressure pot and curing under pressure assures that the rubber will get into the recesses or holes you do have.
                      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

                      • SSBN659
                        Commander
                        • Feb 2009
                        • 403

                        #86
                        Geez David, now I have to go out buy some lacquer thinner, more CA and raid my wife's pantry for some baking soda. Does it ever stop? :)

                        Tom, I sprayed the masters with Rust-Oleum primer sanded down to 600 grit then sprayed with mold release. But I think you are right on about plugging the holes because they were deep. Don't have a pressure pot as this is likely my last build.

                        Thanks, as always.

                        Will Rogers
                        SSBN659

                        Comment

                        • He Who Shall Not Be Named
                          Moderator
                          • Aug 2008
                          • 12200

                          #87
                          Originally posted by SSBN659
                          Geez David, now I have to go out buy some lacquer thinner, more CA and raid my wife's pantry for some baking soda. Does it ever stop? :)

                          Tom, I sprayed the masters with Rust-Oleum primer sanded down to 600 grit then sprayed with mold release. But I think you are right on about plugging the holes because they were deep. Don't have a pressure pot as this is likely my last build.

                          Thanks, as always.

                          Will Rogers
                          SSBN659
                          LOL. Whaaaa... whaaaaa! (you're here to be punished!)
                          Who is John Galt?

                          Comment

                          • trout
                            Admiral
                            • Jul 2011
                            • 3539

                            #88
                            Originally posted by SSBN659
                            Geez David, now I have to go out buy some lacquer thinner, more CA and raid my wife's pantry for some baking soda. Does it ever stop? :)

                            Tom, I sprayed the masters with Rust-Oleum primer sanded down to 600 grit then sprayed with mold release. But I think you are right on about plugging the holes because they were deep. Don't have a pressure pot as this is likely my last build.

                            Thanks, as always.

                            Will Rogers
                            SSBN659
                            Some paints work and others do not (even in the same brand) - I have had rust-oleum react badly with my platinum silicon. Anyways, love watching you work.
                            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

                            • SSBN659
                              Commander
                              • Feb 2009
                              • 403

                              #89
                              Making progress slowly.

                              Click image for larger version

Name:	Ringed Propeller copy.jpg
Views:	146
Size:	58.1 KB
ID:	170835

                              Click image for larger version

Name:	Fat line thin line copy.jpg
Views:	184
Size:	43.9 KB
ID:	170834

                              Will Rogers
                              SSBN659
                              Attached Files

                              Comment

                              • SSBN659
                                Commander
                                • Feb 2009
                                • 403

                                #90
                                Started work to rebuild voids in countermeasures. First step was to build dams with blue tape to hold baking soda in place.

                                Click image for larger version

Name:	Blue tape dam copy.jpg
Views:	152
Size:	42.1 KB
ID:	170973

                                Then filled voids with baking soda and hit them with CA glue. In the background is a master for the forward dive plane.

                                Click image for larger version

Name:	Blue tape dam and plane copy.jpg
Views:	124
Size:	53.2 KB
ID:	170974

                                Not much progress on Tucson because my wife is recovering from another fall and my priorities have changed, but I'll get there.

                                Will Rogers
                                SSBN659

                                Comment

                                Working...