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ANOTHER GREAT FRISCO RAFFLE!

F Unit Renumbering From Four Digit To Two Or Three Digits And When Did This Occur - Inquiry

Discussion in 'Electo-Motive Division (EMD)' started by mopguy, Jul 6, 2016.

  1. mopguy

    mopguy Member

    Hello members,

    Well I got my Athearn Genesis FP7As and are they great!

    Cannot wait until I can run them. I will be coming over Tony. Lol.

    This leads to my question.

    I noticed that the Genesis Fp7A units are numbered in 2 digits and the F7B or F9B units are 3 digit.

    When did they renumber the F units from 4 digit to 2 digit numbers?

    Note the new Genesis units are Mandarin orange and white.

    I model 1964 to 1967 and I always thought the F units were 4 digit unit numbers.

    Thanks,

    Larry Winfrey
     
    Last edited by a moderator: Feb 25, 2024
    mopguy, Jul 6, 2016
    #1
  2. klrwhizkid

    klrwhizkid Administrator Staff Member Administrator Frisco.org Supporter

    The F7 and F9 units all began as four digit units in the 5000 series from 5018 - 5051 and 5118 - 5152.

    In the 1968 renumbering, in most cases, the preceding 5 and zero digits were dropped if present.

    Thus numbers 5040, 5043, and 5050 became 40, 43 and 50 respectively.

    Numbers 5135 and 5145 became 135 and 145 respectively.

    It is more complicated than that, but it will suffice as an abbreviated explanation.

    For further understanding, I will refer you to Louis A. Marre and John Baskin Harper's Frisco Diesel Power.
     
    Last edited by a moderator: Feb 25, 2024
    klrwhizkid, Jul 6, 2016
    #2
  3. meteor910

    meteor910 2009 Engineer of the Year Staff Member Frisco.org Supporter

    Correct.

    The F3A renumbering was a little more complicated.

    K
     
    Last edited by a moderator: Feb 25, 2024
    meteor910, Jul 6, 2016
    #3
  4. mopguy

    mopguy Member

    Thanks Keith,

    That is the information I needed and as you directed I will refer to the Frisco Diesel Power book by Marre & Harper.

    Larry
     
    Last edited by a moderator: Feb 25, 2024
    mopguy, Jul 7, 2016
    #4

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