Largest Steam Locomotives

Discussion in 'Getting Started' started by Mountain Man, Jan 23, 2007.

  1. Mountain Man

    Mountain Man Active Member

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    The largest American steam locomotives were trhe Big Boy 4-8-8-4 and the Challenger 4-6-6-4's, but I briefly saw a mention of a larger class with three sets of main drivers, making it something like a 4-6-6-6-4. Was there such an engine?
  2. shaygetz

    shaygetz Active Member

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    The Virginian and the Erie both had what are called "triplexes". The Erie's was a 2-8-8-8-2 and the Virginian's was a 2-8-8-8-4. Both were not too successful because of the massive amounts of steam needed for the relatively low returns in tractive effort. Here's a link>>>

    http://www.dself.dsl.pipex.com/MUSEUM/LOCOLOCO/triplex/triplex.htm
  3. Mountain Man

    Mountain Man Active Member

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    Those things are monsters! Thanks for the info and link. :)
  4. nachoman

    nachoman Guest

  5. Triplex

    Triplex Active Member

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    So as you see, the Triplexes weren't super-huge, because the third set of drivers was under the tender. That's one of the limitations of Whyte notation: it assumes the tender is irrelevant.
  6. bigsteel

    bigsteel Call me Mr.Tinkertrain

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    hey triplex i finally got your namesign1 .before this i had know idea what it meant.:D
  7. railohio

    railohio Active Member

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    C&O's 2-6-6-6 models are/were considered the heaviest.
  8. Cannonball

    Cannonball More Trains Than Brains

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    :eek: Good golly, Molly! :eek:
  9. bigsteel

    bigsteel Call me Mr.Tinkertrain

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    actually the C&O had alot of powerful engines.there 0-10-0 i read was the most powerful switcher EVER made.that is some power right there.and there 2-6-6-2's with flying pumps were also famous.C&O is my favorite line of all time!!