Choctaw, Oklahoma & Gulf 2-2-2 "Single" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Arapahoe (Locobase 12283)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 21, p. 214. (Many thanks to Ron Goldfeder for his 21 January 2017 email reporting on the Arapahoe's later career, which he considerably amplified in February 2017 with pages 266-267 from the Baldwin Record of Recent Construction, No 9 and his own October 2016 compilation of the Arapahoe's history. ) Works number was 16027 in July 1898.

Although this inspection engine resembled the kind of steam dummy used by street railways, there were no couplers on either end. Moreover, when it was ordered, the specs included the requirement to travel up a 1%, 4-mile (6.4 km) grade at 35 mph (56 kph), a figure never achieved by tram engines.

Specs showed that the cab had a clerestory and an interior finish of quartered oak. One door opened from the front platform to the passenger compartment with the other (left side) having a large window. Below the two fixed step treads on either side of the platform was a drop step that could be lowered to ease access from rail level.

Slide doors on either side opened into the engineer's compartment. The fireman's space held the toilet. Crystal plate glass cab windows were spring balanced and were to be able to take E J Barron Curtain fixtures, but not the fixtures themselves. All the finished hardware in the cab was to be nickel plated.

The October 1899 edition of the railroad's house organ (The Choctaw) proudly saluted the opening of the last segment, which connected Howe, Indian Territory with Little Rock, Ark. The Arapahoe brought a party of luminaries to the City of Roses for what the headline described as "a Warm Reception for the Railroad which Saved the State."

Five years later, the CO & G sold the Arapahoe through a broker to the Due West Railroad as their #2. The Due West connected the South Carolina town and its Erskine College with Donalds, SC. Ron Goldfeder found that the Arapahoe only lasted less than two months on the Due West Ry. "On January 27, 1908 the first freight was carried by the Due West Ry, a car of cotton. By the end of February a former elevated Forney had replaced it."

Its failure was its mismatch with the service. Goldfeder explains that the Due West, while short, "was located in the piedmont area with rolling terrain and there was a 62 foot [18.9 m] difference in elevation between the two end points.Whatever the grades were the locomotive could not handle them pulling cars." (A factor of adhesion of 7.24 lb/lb of tractive effort underscores the locomotive's feeble power. Goldfeder notes that adding pilot beams and couplers only exacerbated the problem.)

Goldfeder adds key information about the Arapahoe's further adventures as well as giving us a capsule description of its new operator:

The Arapahoe was "then sold to the El Paso Suburban outside of El Paso, TX, where it remained in service from late 1908 until January 1914 when the equipment was offered for sale. The El Paso line was part of a real estate development called Tobin Town and when its main sponsor Frank R. Tobin died in January 1914 it faded away. In El Paso, the Arapahoe took the name "Jack Tobin,"for the son of the promoter."

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,283
RailroadChoctaw, Oklahoma & Gulf (CRI & P)
Number in Class1
Road Numbers
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m) 9.62 / 2.93
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender) (ft / m) 9.62 / 2.93
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)18,000 / 8165
Engine Weight (lbs / kg)32,000 / 14,515
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)32,000
Tender Water Capacity (gals / ML)500 / 1.89
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)30 / 15
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 1067
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)8" x 12" / 203x305
Tractive Effort (lbs / kg)2487 / 1128.09
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.24
Heating Ability
Firebox Area (sq ft / m2)32.34 / 3
Grate Area (sq ft / m2) 9.17 / 0.85
Evaporative Heating Surface (sq ft / m2)159 / 14.77
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)159 / 14.77
Evaporative Heating Surface/Cylinder Volume227.75
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1467
Same as above plus superheater percentage1467
Same as above but substitute firebox area for grate area5174
Power L15145
Power MT630.15