Texas, Oklahoma & Eastern 2-6-2 "Prairie" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 203 (Locobase 14123)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 43, p. 221 and Vol 53, pp. 331+. Works numbers were 37523 in January 1912, 45549 in May 1917.

Dierks Lumber Company incorporated this grandly named shortline as an extension of Arkansas's DeQueen & Eastern into Oklahoma. The TO&E headed west from the Arkansas-Oklahoma state line at West Line, Ark 40 miles to Valliant.

The DeQueen & Eastern ordered these near-duplicates of the three it operated (Locobase 11748) for the TO&E. It had more firebox heating surface in an oil-fired layout, but was required on similarly "rough track" metalled with 56 lb/yard (28 kg/metre) rail. According to a later "Hereafter" note dated 20 June 1913, Baldwin was called on to "redesign valve motion. Arrange a valve motion bearer front of main drivers, the link bearing to extend between this motion bearer and the guide bearer. Strengthen the cast-steel guide yoke and make the reverse lever rod heavier section." Presumably, the 207 benefited from these admonitions.

Although a wholly owned subsidiary, the TO&E operated independently until it was absorbed in 1996.


Class 209 (Locobase 14970)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 65, pp. 305. Works number was 53269 in May 1920.

The TO&E was the Oklahoma extension of the De Queen & Eastern Railroad in Arkansas. It had bought duplicates of an earlier Ten-wheeler design that served on the DQ&E in 1912. In 1920 it reproduced the 1917 DQ&E coal-burning Ten-wheeler (Locobase 14969) that had a longer boiler and a new firebox that was shorter, wider, and not as deep as the older oil-burning design. The brick arch was supported by two arch tubes that contributed 11 sq ft (1.03 sq m) to the firebox heating surface.

Principal Dimensions by Steve Llanso of Sweat House Media
Class203209
Locobase ID14,123 14,970
RailroadTexas, Oklahoma & EasternTexas, Oklahoma & Eastern
CountryUSAUSA
Whyte2-6-22-6-2
Number in Class21
Road Numbers203, 207209
GaugeStdStd
Number Built21
BuilderBaldwinBaldwin
Year19121920
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.0510 / 3.05
Engine Wheelbase (ft / m)26 / 7.9226 / 7.92
Ratio of driving wheelbase to overall engine wheebase 0.38 0.38
Overall Wheelbase (engine & tender) (ft / m)47.25 / 14.4047.25 / 14.40
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)77,000 / 34,92777,500 / 35,153
Engine Weight (lbs / kg)103,000 / 46,720104,500 / 47,400
Tender Loaded Weight (lbs / kg)60,000 / 27,21670,000 / 31,752
Total Engine and Tender Weight (lbs / kg)163,000 / 73,936174,500 / 79,152
Tender Water Capacity (gals / ML)3000 / 11.363000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)1500 / 5.706 / 5.50
Minimum weight of rail (calculated) (lb/yd / kg/m)43 / 21.5043 / 21.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 116846 / 1168
Boiler Pressure (psi / kPa)180 / 12.40180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x61016" x 24" / 406x610
Tractive Effort (lbs / kg)20,435 / 9269.1720,435 / 9269.17
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.77 3.79
Heating Ability
Firebox Area (sq ft / m2)112 / 10.4199 / 9.20
Grate Area (sq ft / m2)16.80 / 1.5620.60 / 1.91
Evaporative Heating Surface (sq ft / m2)1366 / 126.901466 / 136.19
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1366 / 126.901466 / 136.19
Evaporative Heating Surface/Cylinder Volume244.58262.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation30243708
Same as above plus superheater percentage30243708
Same as above but substitute firebox area for grate area20,16017,820
Power L147594845
Power MT408.77413.47

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