3 1/2 inch small boilered TICH

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3 1/2 inch small boilered TICH

Home Forums Work In Progress and completed items 3 1/2 inch small boilered TICH

Viewing 25 posts - 126 through 150 (of 303 total)
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  • #196236
    Ryan Norton
    Participant
      @ryannorton40317

      Last night I cut out the throat plate and drilled the holes for the rivets in the strap and wrapper.

      013 boiler.jpg

      014 boiler.jpg

      015 boiler.jpg

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      #196336
      Ryan Norton
      Participant
        @ryannorton40317

        I did the final fitting of the throat plate last night and drilled the rivet holes.

        Now to make some rivet dollies and formers and Ill be on my way to having a wrapper ready for brazing!

        016 boiler.jpg

        017 boiler.jpg

        Excuse the bad quality of the first photo. Sorry.

        #196342
        doubletop
        Participant
          @doubletop

          Posted by Ryan Norton on 08/07/2015 11:31:55:

          …….. I ended up adding an extra two millimeters to the width between the bend lines and it worked. (I still don't understand this)…

           

          Ryan

          …. And it still fits between the frames? Don't ask, it nearly happened to me but realised before applying heat.

          BTW you are doing a fantastic job, it will be worth the effort

          Pete

          Edited By Doubletop on 10/07/2015 09:07:48

          #196344
          Ryan Norton
          Participant
            @ryannorton40317

            Hi Pete

            Yes, the outer wrapper dimensions did not change and I have test fitted this already between the frames and it is fine. I just had the issue with the wrapper. I need to model this in Solid works and see what happens, I still cant explain how I lost the two millimeters from the wrapper when the bends are soo tight…?

            Oh well, no matter, its fixed!

            Thanks for the support!

            #196349
            MK
            Participant
              @mk72051

              Looks great Ryan. A lot cleaner than my work

              #196957
              PDBV
              Participant
                @pdbv

                Hi Ryan,

                Thats some great progress youve made there ive been following this all the way, (whilst also building a tich &#128512

                Have you done the springs for the axle boxes yet ? If so what did you use and where from ?

                Thanks

                Pete

                #196987
                Ryan Norton
                Participant
                  @ryannorton40317

                  HI Pete>>

                  I have done the springs, you can see them in some of the first photos I placed on this post.>>

                  I used 0.8 mm piano wire from the local hobby shop. I used the screw cutting function on the Myford to wind the springs at a specific pitch. To be honest I am not extremely satisfied with them or the setup described by LBSC, but it works.>>

                  If I were to do it again or modify this design I would use the method whereby the axle boxes have two rods screwed into their bottom ends, protruding through the hornstays. See pic below.

                  >>

                  axle box.jpg

                  I think this is a much nicer looking setup than the proposed design. I am just not sure if there is enough space for it?

                  #196988
                  Ryan Norton
                  Participant
                    @ryannorton40317

                    Here is a picture of all of the blobs

                    19 bits and bobs.jpg

                     

                    The springs were made on the lathe using piano wire and the screw cutting train on the lathe. The TPI was guessed really, but it seems to work…

                     

                     

                    Edited By Ryan Norton on 17/07/2015 08:28:06

                    #196996
                    Robin King
                    Participant
                      @robinking15611

                      FWIW – my Tich, built by a late friend of mine, has the springs below the axleboxes. In use they are a real pain due to the minimal clearance over the track, and I'm now looking at replacing them with coil springs above the boxes, as LBSC's design.

                      #196997
                      PDBV
                      Participant
                        @pdbv

                        Hi Ryan,

                        Thanks for the info, managed to find some made to fit the tich on glr's website so that will save me making some

                        Thanks

                        Pete

                        #197002
                        Ryan Norton
                        Participant
                          @ryannorton40317

                          Hi Robin

                          I thought there may be an issue with that…

                          Pete, glad you are sorted.

                          Does anyone have plans or pictures of a simple driving car for Tich?

                          Please let me know/ send pics etc.

                          Thanks

                          #197522
                          PDBV
                          Participant
                            @pdbv

                            Hi Ryan,

                            Cant help with the driving truck unfortunately,

                            I do have another question though, when forming the flanges on the outer skin of the bulk head (not sure of its propper name) for the boiler do they have to be spliced so that they bend round the 90 degree?

                            I hope you understand what im on about, i think i do but only just haha, i can visualise what i mean but cant turn it into words haha

                            Thanks

                            Pete

                            #197545
                            Ryan Norton
                            Participant
                              @ryannorton40317

                              HI Pete

                              I assume you are talking about the firebox tube and door plates? If not, I do not think it matters, either way you do not need to "splice" the corners. You will need to anneal the copper a number of times when bending the flanges and hammering them around the corners. As soon as the copper starts to buckle, you will need to re- anneal. I have just done my firebox tube plate and it needed about 6 "annealings" before it was finally done.

                              #197546
                              Ryan Norton
                              Participant
                                @ryannorton40317

                                Here are some pics of the flue tubes being marked out as well as in place in the firebox tube plate.

                                018 marking flue tubes.jpg

                                019 flue tubes in place.jpg

                                020 flue tubes in place.jpg

                                021 firebox tube plate with tubes in place.jpg

                                022 firebox tube plate.jpg

                                023 flue tubes and tube plate.jpg

                                #197547
                                Ryan Norton
                                Participant
                                  @ryannorton40317

                                  I also managed to finally make the wrist pin for the axle driven water pump.

                                  axle pump wrist pin.jpg

                                  #197599
                                  PDBV
                                  Participant
                                    @pdbv

                                    Hi Ryan,

                                    What you have described makes perfect sence,

                                    I just wasnt sure if the copper would buckle even when annealed

                                    Thanks for your help

                                    Your progress is brilliant, i have just recieved my 7BA taps (for the steam chest) in the post this morning now im ready to make the top caps and they will soon be done

                                    All the best

                                    Peter

                                    #198075
                                    Ryan Norton
                                    Participant
                                      @ryannorton40317

                                      Hi Peter

                                      Thanks for the kudos!

                                      I have done some more boiler work this weekend, managing to do the firebox door plate.

                                      I also took some photos of the various stages of the progression from flat plate to flanged plate.

                                      For this particular plate I annealed 7-8 times.

                                      See below:

                                      024 boiler.jpg

                                      025 boiler.jpg

                                      026 boiler.jpg

                                      027 boiler.jpg

                                      028 boiler.jpg

                                      029 boiler.jpg

                                      030 boiler.jpg

                                      Above is the plate after quenching in cold water.

                                      #198432
                                      Ryan Norton
                                      Participant
                                        @ryannorton40317

                                        I have done the firebox crown sheet, which was much harder than just bending the sheet in two places. In order to obtain the correct radius for the flanged ends, a lot of wangling was involved. I am still not happy with the fir and will probably need to anneal the sheet one more time to get it to fit correctly.

                                        Here are some pics.

                                        PS: You have got to love the perspective of these photos

                                        031 boiler.jpg

                                        032 boiler.jpg

                                        033 boiler.jpg

                                        034 boiler.jpg

                                        #198532
                                        PDBV
                                        Participant
                                          @pdbv

                                          Looking great Ryan ive just finished my first cylinder, just need all the gland packing and a bit of fine fettling to get it 100%

                                          #198643
                                          Neil Wyatt
                                          Moderator
                                            @neilwyatt

                                            Great to see your progress.

                                            Neil

                                            #198991
                                            Ryan Norton
                                            Participant
                                              @ryannorton40317

                                              Thanks Neil

                                              #213276
                                              Ryan Norton
                                              Participant
                                                @ryannorton40317

                                                Ok so it has been far too many months of quiet on this thread.

                                                I have quietly been Solidworking away on the valve gear for dear ol' Tich.

                                                I have had many, many frustrated moments but I think finally my assembly is near to final.

                                                One thing I have picked up is that the expansion link gear frame, as designed in the book by LBSC, seems too wide?

                                                I have double checked all my dimensions in the model and can't find any deviations from the book?

                                                Has anyone else picked this up?

                                                I am planning on using E-clip external fasteners on as many of the pivot points as possible and have therefore modified some of these sizes to suit.

                                                So far it looks good. I just hope it functions as well.

                                                Ill try and post some pictures of the model some time.

                                                #213310
                                                Another JohnS
                                                Participant
                                                  @anotherjohns

                                                  Hi Ryan;

                                                  My Tich is slip eccentric so no comments on the expansion link gear frame. Would not surprise me if there is an issue – LBSC designs always seemed to include some issues.

                                                  Also, I'm awaiting a shipment of small Stainless E-clips- reading Kozo Hiraoka's books and his use of them finally convinced me that these are a good idea.

                                                  I have seen a 5" narrow gauge locomotive with e-clips on many of the round rods for end retainers, and it did not look out of place.

                                                  Get back to the workshop! John.

                                                  #213686
                                                  Ryan Norton
                                                  Participant
                                                    @ryannorton40317

                                                    HI John

                                                    Agreed, I shall be back in the workshop soon.

                                                    The E-clips I have purchased are not stainless steel but mild steel. I managed to purchase all of the sizes I need quite cheaply.

                                                    Below are a few screen shots of the assembly drawing of my Tich with the small adjustments made to the valve gear and associated mounting gear.

                                                    tich 001.jpg

                                                    tich 002.jpg

                                                    tich 003.jpg

                                                    tich 005.jpg

                                                    tich 006.jpg

                                                    tich 007.jpg

                                                    tich 008.jpg

                                                    tich 009.jpg

                                                    tich 010.jpg

                                                    I am going to try and get the valve gear laser cut to reduce machining time.

                                                    Hopefully this will work.

                                                    #213703
                                                    Weary
                                                    Participant
                                                      @weary

                                                      Laser cut gear parts available here.

                                                      Other suppliers available!

                                                      Regards,

                                                      Phil. (Builder & owner small boiler Tich)

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