Forums Modeling Technical Modeling
  • Topic: AML 50' Hi-cube / End-of-Car cushion unit

    Back To Topics
    (0 rates)
    • March 28, 2019 8:14 AM EDT
      • Sparta, TN
         
      • Posts
        408
      • Thanks
        3
      • Thanked
        109

      AML 50' Hi-cube / End-of-Car cushion unit

      I was asked a while back about making an extended shank version of my couplers for the AML 50’ Hi-cubes.  The more I looked at prototype photos, the more I began to think I could do better than just stretching the shank.  The prototype uses a Keystone End-of-Car Cushion Unit.  Having already done a large chunk of the design work on previous projects, I have decided to try to adapt those to the AML car.
       
      I had a run of draft sills done in .030” photo-etched brass.  They are longer than this car needs, but easily trimmed down:
       
       
      I was hoping I would be able to use the AML underframe, as is.  However, when I got my hands on one, I found that they lowered the floor for the coupler mounting pad:
       
       
      This will make my draft sill ride lower.  I haven’t made my mind up if I’ll cut the mounting pad off, or raise the coupler head in my drawings.  There is no interference with the trucks either way.  I will have to cut out part of the molded-on draft sill though:
       
       


       

      Exploded view:
       
       
      The prototype EOC allows for 15” of travel in the buff position (compressed).  After studying the CYC drawings, I have realized they appear to only allow minimum travel in the draft position (tension).  The prototype uses a hydraulic piston.  I think I can model this with a spring.
      This post was edited by Burl Rice at March 28, 2019 10:45 AM EDT
      ____________________________________

    • March 28, 2019 8:23 AM EDT
      • Port Orchard, Washington
         
      • Posts
        2,164
      • Thanks
        84
      • Thanked
        216

      Who did you use for .030 photo etch services?

    • March 28, 2019 8:35 AM EDT
      • Sparta, TN
         
      • Posts
        408
      • Thanks
        3
      • Thanked
        109

      http://www.photofabrication.com

      ____________________________________

    • March 28, 2019 10:55 AM EDT
      • Port Orchard, Washington
         
      • Posts
        2,164
      • Thanks
        84
      • Thanked
        216

      Thanks, I will be checking them out as I proceed with my project. I've been looking at PPD for my etching, but they have much thinner material.

      https://ppdltd.com/

       

    • March 28, 2019 11:05 AM EDT
      • Sparta, TN
         
      • Posts
        408
      • Thanks
        3
      • Thanked
        109

      PEI can do a wide range of thicknesses, and professional photo-etching can be expensive.  I am looking into laser cutting as an alternative.

      ____________________________________

    • March 28, 2019 12:42 PM EDT
      • Port Orchard, Washington
         
      • Posts
        2,164
      • Thanks
        84
      • Thanked
        216

      Burl Rice said:

      PEI can do a wide range of thicknesses, and professional photo-etching can be expensive.  I am looking into laser cutting as an alternative.

      I figure once I get the artwork done, I can then "shop around" to see what the best deal is. 90% of the work is the drawings! 

    • April 1, 2019 6:58 PM EDT
      • Sparta, TN
         
      • Posts
        408
      • Thanks
        3
      • Thanked
        109

      I had the bottom plate laser cut in .040" Aluminum.  They came in today:

       

       

      I inquired about having them cut in .040" brass, which they said they could do.  However, the cost was 3 times higher for brass.

      ____________________________________

Forums Modeling Technical Modeling

    Icon Legend

  • Topic has replies
    Hot topic
    Topic unread
    Topic doesn't have any replies
    Closed topic
    BBCode  is enabled
    HTML  is enabled

Add Reputation

Do you want to add reputation for this user by this post?

or cancel

Ads by Google