Choctaw, Oklahoma & Gulf 2-2-2 "Single" Locomotives of 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. Works number was 16027 in July 1898.

This may have been an inspection engine. When it was ordered, the specs included the requirement to travel up a 1%, 4-mile grade at 35 mph.

Specs showed that the cab had a clerestory and an interior finishi of quartered oak. One door opened from the platform to the passenger compartment with the other (left side) having a large window. Slide doors on either side opened into the engineer's compartment. The fireman's space held the toile. 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 tht 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 to the Due West Railroad as their #2. The Due West connected the South Carolina town and its Erskine College with Donalds, SC.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12283
RailroadChoctaw, Oklahoma & Gulf (CRI & P)
Number in Class1
Road Numbers
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase
Engine Wheelbase 9.62'
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender) 9.62'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers18000 lbs
Engine Weight32000 lbs
Tender Light Weight
Total Engine and Tender Weight32000 lbs
Tender Water Capacity500 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)30 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter42"
Boiler Pressure160 psi
Cylinders (dia x stroke)8" x 12"
Tractive Effort2487 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.24
Heating Ability
Firebox Area32.34 sq. ft
Grate Area 9.70 sq. ft
Evaporative Heating Surface159 sq. ft
Superheating Surface
Combined Heating Surface159 sq. ft
Evaporative Heating Surface/Cylinder Volume227.75
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1552
Same as above plus superheater percentage1552
Same as above but substitute firebox area for grate area5174
Power L15145
Power MT630.15



If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.