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Union Pacific RR Challenger #3938 Paster

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Railroadiana11 of 59Union Pacific Big Boy…#4002Pennsylvania Railroad GG1 #4850
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    Posted 4 years ago

    Ted_Straub
    (790 items)

    This paster promotes the UPRR's engine 3938, one of its members of the line's Challenger series of locomotives. Built and designed by ALCO for The UP, engines such as these were powerful, durable and up to "the challenge" of the UP's terrain as the line's terrain morphed from prairies to mountains.

    Pasters were issued by all of the locomotive manufacturers as a means of promoting their products, as well as what kind of equipment their company could produce.

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    Comments

    1. blunderbuss2 blunderbuss2, 4 years ago
      I know these were referred to by the number of wheels. Would this be a 4x6x6 or what ?
    2. Ted_Straub Ted_Straub, 4 years ago
      Hi, Buss…thanks for the question, and your assumption is correct. With the ALCO pasters, we can look at the reverse, and the info will appear on the top left of the card in the "Class" section….where we will see "4664" for this particular machine.

      And, as always, I appreciate your love of this item…...
    3. Ted_Straub Ted_Straub, 4 years ago
      Good evening, packrat-place and jscott…thank you both for the love!
    4. blunderbuss2 blunderbuss2, 4 years ago
      Oops! I missed the last "4". Only the engines & not anything else ? I think there was a mention on another of your posts about "3 cyl.". Does that mean just 3 cyls. per set of wheels (or whatever) or 3 cyls. like a 3 stage compressor to build up more pressure ?
    5. Ted_Straub Ted_Straub, 4 years ago
      Thanks, Buss…those are good questions, and I'm not really that fluent on the subject, but attached is a reference that explains this cylinder question in a basic way. Making your question even more difficult to answer is this engine has 4 cylinders!

      In respect to what the attached states, I think that your idea on pressure variations is pretty close explaining the principle.

      I love mechanical engineering problems, and thus I doubly appreciate your interest in this cylinder question. It's good to question things, and I'm sure that your input will generate more responses on this subject

      https://en.wikipedia.org/wiki/Compound_locomotive
    6. Ted_Straub Ted_Straub, 4 years ago
      Buss..PS..the back of the paster reveals this as a 4 cylinder locomotive.

      I wish that they would have covered topics like this in HS and entry level College physics!
    7. Ted_Straub Ted_Straub, 4 years ago
      Thanks for the love, Caperkid!
    8. fortapache fortapache, 4 years ago
      BB2 it would be 4-6-6-4. That is how they normally notate the wheel configuration. Although yes on the card it says 4664.
    9. Ted_Straub Ted_Straub, 4 years ago
      Thank you, Recordmantime and Gargoylecollector…I appreciate the loves!
    10. Ted_Straub Ted_Straub, 4 years ago
      Hi, fortapache, Thomas, Dave and Sean! Thank you all for the loves!
    11. Ted_Straub Ted_Straub, 4 years ago
      Thank you, Iggy!
    12. Ted_Straub Ted_Straub, 4 years ago
      Hi, true....I appreciate the love!
    13. Ted_Straub Ted_Straub, 3 years ago
      Thank you, GateKeeper!

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