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  • #46
    quote:


    Originally posted by George D


    quote:


    Originally posted by BurleyJim



    Yes! I'm actually looking at a plate of Ravioli and Italian sausage. [:-chef]


    You're making me hungry, are you sharing?

    George


    Bring a fork!
    Jim
    Take the red pill

    Comment


    • #47
      quote:


      Originally posted by George D


      Jim, are you looking at something like this?



      George


      Thanks for this drawing. It may solve a roof problem in my future.
      Home of the HOn3 North Coast Railroad, along the shores of Lake Ontario.

      Comment


      • #48
        Bernd, I was wrong, it takes 9 segments to make 180°. The straight sections of roof connect the two 9 segment pieces. I'm on my laptop, so I can't correct my drawing.

        George
        The sky is not my limit, it's my playground.

        Comment


        • #49
          Here's the corrected copy.



          George
          The sky is not my limit, it's my playground.

          Comment


          • #50
            George,

            I don't see where you are getting 9 segments. I get 7. That would be 25.714 degrees per segment.



            Bernd
            New York, Vermont & Northern Rwy. - Route of the Black Diamonds

            Comment


            • #51
              Good grief, I need a cone head hat, all that high end mathamagicicall whizzardry...You know you'll need a circular interface underneath so this roof will fit down snug on the pottery tubes....
              Karl Scribner-Curmudgeon

              Cedar Swamp
              SW of Manistique, MI

              AVATAR Image stolen from Model Train Stuff advertisement in my e-mail

              Comment


              • #52
                Try connecting the towers without the 'straight] #0 & #8 and you will then see why you need an 18 sided polygon to do it. The panels are 20 degrees. Where do you get a 25.714 degree jig to build this rascal?

                Jim
                Take the red pill

                Comment


                • #53
                  quote:


                  Originally posted by BurleyJim


                  Try connecting the towers without the 'straight] #0 & #8 and you will then see why you need an 18 sided polygon to do it. The panels are 20 degrees. Where do you get a 25.714 degree jig to build this rascal?

                  Jim


                  I divided 7 into 180 = 25.714. I'd draw a segment with a 25.714 or 25.7 degree, print it out and use that to build a jig.

                  Now you got me interested to see if I can draw that in CAD.

                  Edit Added:

                  Ok, here's my drawing with 7 segments of 25.714 degrees for each segment.



                  Bernd
                  New York, Vermont & Northern Rwy. - Route of the Black Diamonds

                  Comment


                  • #54
                    You're right, Bernd, my count is off.

                    George
                    The sky is not my limit, it's my playground.

                    Comment


                    • #55
                      Can you see the difference? The latest rendition is a divided circle, the previous example was drawn as a polygon. The carpenters back when the roofs were put on would have used a simple 20 degree angle. CAD wasn't even a thing! It's 18! It's aaaaaaaaah mystery!

                      Jim
                      Take the red pill

                      Comment


                      • #56
                        Personally I don't think they used any kind of dimension. If you look at segment 3 and 5 you'll see that they are different than segment 4. Segment 4 looks narrower on the bottom than 3 and 5. Or do I need my eyes recalibrated?

                        Bernd
                        New York, Vermont & Northern Rwy. - Route of the Black Diamonds

                        Comment


                        • #57
                          Looks like now I have to drive to Bergen, rent a htdraulic lift, bring a huge st of calipers and a adjustable bevel square and measure them. Then find out who the contractor was, hire an attorney, only to find out it was a high school 'shop project'.

                          I'll get back to the build tomorrow, I just came off the roof after getting a 'Charley horse' up there. Yeow! It was a lot more fun 40 years ago.

                          Jim
                          Take the red pill

                          Comment


                          • #58
                            If you use a flat drawing that all connects , you will not gain the height of the cone.

                            Think of a hexagon or octagon. Remove one segment. Now close the remaining ends back together.

                            Unless the center goes upward to form a cone, you can't do it. If you keep ALL segments it must remain flat. One has to be missing.

                            That's why the original drawing by George is correct and the subsequent drawing by Benrd will not work properly. You need that missing segment to form the cone.

                            I have already printed out, and formed Georges drawing, It works. But there is an easier way though to cut the shape, which would include tabs for gluing. I have modified George's original drawing slightly to show it below.

                            Try it it works.

                            (If you want more room for the endless bucket loader in the middle, or third silo just extend the length of the rectangles as needed.)


                            Home of the HOn3 North Coast Railroad, along the shores of Lake Ontario.

                            Comment


                            • #59
                              Trying not to sound snarky here but, I started this thread to show how I go about building a model using the 'additive manufacturing' process

                              aka 3D printing. I'm not cutting materials.

                              Jim
                              Take the red pill

                              Comment


                              • #60
                                quote:


                                Originally posted by BurleyJim


                                Looks like now I have to drive to Bergen, rent a htdraulic lift, bring a huge st of calipers and a adjustable bevel square and measure them. Then find out who the contractor was, hire an attorney, only to find out it was a high school 'shop project'.

                                I'll get back to the build tomorrow, I just came off the roof after getting a 'Charley horse' up there. Yeow! It was a lot more fun 40 years ago.

                                Jim


                                Good luck on the roof. They took it off last year. Anyway, back to lurking and watching you finish those silos.

                                And stay off the roof. You're to old to be up there. [^]

                                Bernd
                                New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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