4500-Class Calculated Drawbar Pull

Discussion in '4-8-4 Northern' started by Karl, Jun 6, 2014.

  1. Karl

    Karl 2008 Engineer of the Year Frisco.org Supporter

    I discovered an article on the Kalmbach web site that ostensibly lists the Baldwin-calculated drawbar horsepower curves from several 4-8-4s including the Frisco's 4500 class.

    Based on the plotted curve, the 4500s produced a maximum horsepower of about 4200 HP, which is considerably less than the 5600 HP listed by Stagner, who cites the Frisco as his source.
    http://ctr.trains.com/~/media/Files/PDF/4-8-4 Locomotives/5-Later Baldwin 4-8-4 DBHP.pdf

    http://ctr.trains.com/en/Railroad Reference/Locomotives/2011/11/Calculated drawbar horsepower curves for 4-8-4s.aspx
    Last edited: Apr 16, 2024
  2. Frisco1515

    Frisco1515 Frisco1515

    That is interesting, because David P Morgan is his book Steam's Finest Hour lists the 4500s max horsepower at 5600 between 47 and 65 mph.
    Last edited by a moderator: Mar 15, 2024

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