Dimensions of a Tender

Discussion in '4-6-2 Pacific' started by dpeterson3, Nov 21, 2018.

  1. dpeterson3

    dpeterson3 Member

    I'm working on designing a model of 1046. I am using CAD to design it before I build. I am having trouble finding the dimensions of the tenders of these engines. Specifically, how much does the tank overhang the frame rails and how tall are the rails. In addition, I cannot find the dimensions of the end sills. I am visiting family in Tulsa and Saint Louis this week. Are the 4500 or 1500 class tenders similar enough I can measure one of them to get a good approximation of how to build a pacific tender? Any other dimensions I should pull while I'm at it?
    Ozarktraveler likes this.
  2. Karl

    Karl 2008 Engineer of the Year Frisco.org Supporter

    During 1942-1943, the Frisco's West Shop forces modernized the 1912-built, ALCO, 1040-class locomotives. Common among "most" of the modernized locomotives was an increase in steam pressure from 175psi to 205psi, and a reduction in cylinder bore from 26" to 24", the addition of a trailer booster added 8400lb of tractive effort. It might not be much of a stretch to say that no two of the modernized 1040's were exactly alike.

    As the 2-10-2 spot engines were retired and after the Big Ten Hundred were rebuilt, the Frisco had an ample supply of tenders, which could be used in other applications, e..g., auxiliary tenders, tenders for the Firefly engines, etc. The the tenders from both classes of locomotives were nearly identical in their basic dimensions. In the case of the 1046, I believe that its tender came from one of the 1060-class locomotives. The tender profile was change during the modernization, but the basic dimension would have remained unchanged.

    Last edited: Nov 22, 2018
  3. yardmaster

    yardmaster Administrator Staff Member Administrator Frisco.org Supporter

    Truer words have never been typed, either on this forum or its predecessor newsletters.

    Excellent summary and accompanying drawing, Karl. Hearing of the "what" and "why" for the Frisco's Motive Power Dept. in the steam days never ceases to entertain and educate me.
    Joe Lovett and Ozarktraveler like this.
  4. dpeterson3

    dpeterson3 Member

    This is why I want to model the Frisco. Class I railroad that had a really home grown feel. Anyway, thanks for the information. The diagram still doesn't give me some of the measurement's I'm looking for, though. I am looking for the frame rail sizes, end sill sizes (length, width, height). Since I don't need to make it exact, and just want to preserve the ratio look, I guess I can just measure what I know and then measure what I don't know and extrapolate.
    Joe Lovett likes this.

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