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.
|Class||Qty.||Road Numbers||Year Built||Builder||Notes|
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|
|Railroad||Alabama & Vicksburg|
|Number in Class||5|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.85|
|Overall Wheelbase (engine & tender)||67.58'|
|Axle Loading (Maximum Weight per Axle)||45180 lbs|
|Weight on Drivers||218400 lbs|
|Engine Weight||274720 lbs|
|Tender Light Weight||154000 lbs|
|Total Engine and Tender Weight||428720 lbs|
|Tender Water Capacity||7500 gals|
|Tender Fuel Capacity (oil/coal)||14 tons|
|Minimum weight of rail (calculated)||73 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||200 psi|
|Cylinders (dia x stroke)||26" x 28"|
|Tractive Effort||51484 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.24|
|Firebox Area||257 sq. ft|
|Grate Area||58.70 sq. ft|
|Evaporative Heating Surface||3278 sq. ft|
|Superheating Surface||754 sq. ft|
|Combined Heating Surface||4032 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||190.51|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||11740|
|Same as above plus superheater percentage||13971|
|Same as above but substitute firebox area for grate area||61166|