Alabama & Vicksburg 2-10-2 "Santa Fe" Locomotives of the USA

In 1919, the Alabama & Vicksburg Railroad took delivery of two "Santa Fe" type locomotives built by the Baldwin Locomotive Works. These two locomotives intended for freight service were designated as Class K and assigned road numbers 470 and 471. They had 57" diameter drivers, 26" x 28" cylinders, a 185 psi boiler pressure, they exerted 52,200 pounds of tractive effort and each weighed 274,715 pounds. Another Class K 2-10-2, very similar to number 470 was received in 1920 and was assigned road number 472.

In 1921 Baldwin delivered another "Santa Fe" which was intended for use in passenger service as well as for freight and it was assigned road number 473 and put into Class K. This locomotive had 58" diameter drivers, 26" x 28" cylinders, a 185 psi boiler pressure, it exerted 51,300 pounds of tractive effort and weighed 277,270 pounds. Another Baldwin-built 2-10-2 similar to 473 was delivered in 1922 and was assigned road number 474.

The Class K locomotive's boiler was a straight top design containing a fire tube superheater. They had a combined heating surface of 4,032 square feet and were rated at 1,670 tons up a 1% grade at slow speed. Steam was delivered through 14" diameter piston valves.

There are no surviving A&V 2-10-2 "Santa Fe" type locomotives.

Roster by Richard Duley

ClassQty.Road NumbersYear BuiltBuilderNotes
K 2470-4711919Baldwin1
K 14721920Baldwin1
K 14731921Baldwin1
K 14741922Baldwin1
  1. Numbers 470-474 transferred to the IC roster with the acquisition of the A&V by the IC in 1926. The IC rebuilt numbers 470-474 to 0-10-0 locomotives between 1938 and 1941 and renumbered them 3602-3606. Numbers 3602-3606 scrapped between 1949 and 1951.

Class Details by Steve Llanso of Sweat House Media

Class K (Locobase 6083)

Data from the 1926 Alabama & Vicksburg locomotive diagram book supplied in March 2004 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Vol 59, pp. 74+ and Vol 68, pp. 121+. Works numbers were 51646 in March 1919, 51698 in April and 55478-55479 in May 1922. An additional K-class locomotive -- 51676 in April 1919 -- went to the affiliated Vicksburg, Shreveport & Pacific with road number 471.

These five small Santa Fes were delivered singly at first in 1919 and as a pair in 1922); this last pair had Young valve gear when they arrived, but it was soon replaced by Walschaert gear. They were rated at 1,670 tons up a 1% grade at slow speed. Steam was delivered through 14" (356 mm) diameter piston valves.

When absorbed into the Illinois Central, they were given numbers 3100-3104 and converted to 0-10-0 switchers for Chicago's huge Markham Yard. The IC 4 - 1930 Locomotive Diagrams book (also supplied by Allen Stanley) is the source for the firebox heating surface. Arch tubes contributed 33 sq ft of that total.

Specifications by Steve Llanso of Sweat House Media
Locobase ID6083
RailroadAlabama & Vicksburg
Number in Class5
Road Numbers470-474
Number Built5
Valve Gearvarious
Locomotive Length and Weight
Driver Wheelbase (ft)20.33
Engine Wheelbase (ft)24
Ratio of driving wheelbase to overall engine wheebase 0.85
Overall Wheelbase (engine & tender) (ft)67.58
Axle Loading (Maximum Weight per Axle) (lbs)45,180
Weight on Drivers (lbs)218,400
Engine Weight (lbs)274,720
Tender Loaded Weight (lbs)154,000
Total Engine and Tender Weight (lbs)428,720
Tender Water Capacity (gals)7500
Tender Fuel Capacity (oil/coal) (gals/tons)14
Minimum weight of rail (calculated) (lb/yd)73
Geometry Relating to Tractive Effort
Driver Diameter (in)62.50
Boiler Pressure (psi)200
High Pressure Cylinders (dia x stroke) (in)26" x 28"
Tractive Effort (lbs)51,484
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.24
Heating Ability
Firebox Area (sq ft)257
Grate Area (sq ft)58.70
Evaporative Heating Surface (sq ft)3278
Superheating Surface (sq ft)754
Combined Heating Surface (sq ft)4032
Evaporative Heating Surface/Cylinder Volume190.51
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11,740
Same as above plus superheater percentage13,971
Same as above but substitute firebox area for grate area61,166
Power L113,742
Power MT693.59


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