De Queen & Eastern 2-6-2 "Prairie" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 200 (Locobase 11748)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p. 259. Works numbers were 26701 in October 1905, 30010 in January 1907, 35596 in November 1911.

An unusual trio of Prairies with small drivers operated on 30 miles of railway headquarters in De Queen, Arkansas. The 202 was slightly larger and had a bigger firebox. Its eventual stablemate (Waterman 204) had identical dimensions; see Locobase 13828.

While the 201-202 traveled over to the wholly owned subsidiary Texas, Oklahoma & Eastern in 1910, the 200 went to the Waterman Lumber & Supply Company.


Class 208 (Locobase 14969)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 62, pp. 104. Works number was 47437 in December 1917.

The DQ&E and its Oklahoma offshoot TO&E were both owned by the Dierks Lumber and Coal Company and shared engine designs. After the two roads had introduced smallish Prairie in 1912, the DQ&E went to Eddystone a few years later and bought a modified version with a boiler whose fire tube bundle lengthened by about 15" (381 mm) and a new coal-burning firebox that was shorter, wider, and not as deep as the older oil-burner. Also, the brick arch was supported by two arch tubes that contributed 11 sq ft (1.03 sq m) to the firebox heating surface.

14970 shows the TO&E 209, which was identical.

Specifications by Steve Llanso of Sweat House Media
Class200208
Locobase ID11748 14969
RailroadDe Queen & EasternDe Queen & Eastern
CountryUSAUSA
Whyte2-6-22-6-2
Number in Class31
Road Numbers200-202208
GaugeStdStd
Number Built31
BuilderBurnham, Williams & CoBaldwin
Year19051917
Valve GearStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase10'10'
Engine Wheelbase25.25'26'
Ratio of driving wheelbase to overall engine wheebase 0.40 0.38
Overall Wheelbase (engine & tender)46.48'47.25'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers77500 lbs77500 lbs
Engine Weight102500 lbs104500 lbs
Tender Light Weight60000 lbs70000 lbs
Total Engine and Tender Weight162500 lbs174500 lbs
Tender Water Capacity3000 gals3000 gals
Tender Fuel Capacity (oil/coal)6 tons
Minimum weight of rail (calculated)43 lb/yard43 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter46"46"
Boiler Pressure180 psi180 psi
Cylinders (dia x stroke)16" x 24"16" x 24"
Tractive Effort20435 lbs20435 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.79 3.79
Heating Ability
Firebox Area93.40 sq. ft99 sq. ft
Grate Area14.40 sq. ft20.60 sq. ft
Evaporative Heating Surface1348 sq. ft1466 sq. ft
Superheating Surface
Combined Heating Surface1348 sq. ft1466 sq. ft
Evaporative Heating Surface/Cylinder Volume241.36262.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation25923708
Same as above plus superheater percentage25923708
Same as above but substitute firebox area for grate area1681217820
Power L144854845
Power MT382.75413.47


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