De Queen & Eastern 2-6-2 "Prairie" Locomotives in 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.

Principal Dimensions by Steve Llanso of Sweat House Media
Class200208
Locobase ID11,748 14,969
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 Wheelbase (ft / m)10 / 3.0510 / 3.05
Engine Wheelbase (ft / m)25.25 / 7.7026 / 7.92
Ratio of driving wheelbase to overall engine wheebase 0.40 0.38
Overall Wheelbase (engine & tender) (ft / m)46.48 / 14.1747.25 / 14.40
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)77,500 / 35,15377,500 / 35,153
Engine Weight (lbs / kg)102,500 / 46,493104,500 / 47,400
Tender Loaded Weight (lbs / kg)60,000 / 27,21670,000 / 31,752
Total Engine and Tender Weight (lbs / kg)162,500 / 73,709174,500 / 79,152
Tender Water Capacity (gals / ML)3000 / 11.363000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)6 / 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) 3.79 3.79
Heating Ability
Firebox Area (sq ft / m2)93.40 / 8.6899 / 9.20
Grate Area (sq ft / m2)14.40 / 1.3420.60 / 1.91
Evaporative Heating Surface (sq ft / m2)1348 / 125.231466 / 136.19
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1348 / 125.231466 / 136.19
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 area16,81217,820
Power L144854845
Power MT382.75413.47

All material Copyright © SteamLocomotive.com
Wes Barris