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Mann's Creek hopper, ITS ALIVE!!!!!

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  • #31
    The A&O (http://www.aorailroad.com/) used a custom auto loader for its O scale layout. You might want to contact Mr Stewart to see if he can help with the design. One of my co-workers operated on the line, he said they found raw plastic pellets worked best. They were dust free and not to heavy to operate with.
    It is the duty of every patriot to protect his country from its government. -Thomas Paine



    No, That\'s not a mistake. I did that to give it some extra character. I\'m glad you noticed! -Mike@mikesjustbridges.com

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    • #32
      quote:


      Originally posted by mikesjustbridges


      The A&O (http://www.aorailroad.com/) used a custom auto loader for its O scale layout. You might want to contact Mr Stewart to see if he can help with the design. One of my co-workers operated on the line, he said they found raw plastic pellets worked best. They were dust free and not to heavy to operate with.


      That is pretty much how I did it on my HO scale version. I am not sure if any coal railroads (not industrial sized, larger ones) ever loaded coal by using the locomotive to spot the cars under a loading bin, does anyone know? What I have seen is most common was to spot a string of empty cars up hill from the tipple and the tipple workers use the hand brakes to roll the cars under the loader and beyond once loaded. If there was not a empty track on a hill the cars were pulled through by a car puller. It would be easy to make a loading tipple and have the cars pulled spotted by a locomotive and operator, but I am just not sure it would have been done that way.

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      • #33
        just an update to my hopper car project.

        I have built a second hopper car to make sure that I knew what I was doing. When I was happy with the changes and it operation I made some RTV molds. I still will build a few cars from real wood so I get some variations like the prototype cars. So far I have four cars in the process of being built.

        You may notice in the photos a tan patch in the resin molded side bracing, this is strip wood that I cast inside the resin for strength.

        The cars are going together quickly and I should have my planned ten car fleet done rather quickly.




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        • #34
          So....when can we expect kit production to begin??

          Nice job on the reproductions! Thanks for showing.....

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          • #35
            If I could get a vacuum container to eliminate the air bubble issues that cause the high number if unusable casting I would go into kit productions, not just for this car but for all the HO items I have made RTV molds of.

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            • #36
              Count me in please for half a dozen.

              I don't know the level of vacuum you need, but an air ejector can get quite low, especially with low volume chambers.

              Only thing you need then is a cheapo air compressor from Wallmart.

              cheers, Leo.

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              • #37
                I already have a very nice two stage compressor in my garage. I'll have to research this option.

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                • #38
                  The hoppers are really neat. The one featured in the first picture is beautifully painted and weathered. Hope you'll get your fleet as you wish it.

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                  • #39
                    Let us know if you figure out the air bubble issue and I will re start production of my short ON30 passenger car from last fall.

                    I am sure you are already coating the mold in talc?

                    Larry

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                    • #40
                      can i ask what motor it is you have used? might be useful for something on our club layout

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                      • #41
                        Have seen a posting somewhere about 'bubble trouble' where the poster made up a small vibrating table on which he sat the moulds.

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                        • #42
                          Coaltrain,

                          could you share the source for the motors?

                          looks like a great idea

                          thanks
                          Sitting along side the orignal Central Pacific Rail Road.



                          Home of The Great On30 Barn Meet, that will be held May 16th 2015

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                          • #43
                            here is the motor I used.

                            http://www.hobbyengineering.com/H1212.html

                            I have tried tapping the bubbles out but I like to use a backer sheet of plastic so I get a flat back on the castings and so they are all the same thickness, trouble is that it traps the bubbles in the mold. If I used a vacuum chamber I could deair the castings and the add the backer, or I am sure that the vacuum will pull air out from under the backer. I would sure like to know how some of the other resin casting model product sellers do it.

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                            • #44
                              I'm gonna get in line for that kit!

                              Arthur
                              Arthur

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                              • #45
                                Please let us know if you actually do a commercial run.. I'm more than interested, esp. in the HO scale kit possibilities..
                                -- KP --

                                Life is to short to build all of the models I want to.

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