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.
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|
|Railroad||De Queen & Eastern||De Queen & Eastern|
|Number in Class||3||1|
|Builder||Burnham, Williams & Co||Baldwin|
|Locomotive Length and Weight|
|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 Drivers||77500 lbs||77500 lbs|
|Engine Weight||102500 lbs||104500 lbs|
|Tender Light Weight||60000 lbs||70000 lbs|
|Total Engine and Tender Weight||162500 lbs||174500 lbs|
|Tender Water Capacity||3000 gals||3000 gals|
|Tender Fuel Capacity (oil/coal)||6 tons|
|Minimum weight of rail (calculated)||43 lb/yard||43 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||180 psi||180 psi|
|Cylinders (dia x stroke)||16" x 24"||16" x 24"|
|Tractive Effort||20435 lbs||20435 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.79||3.79|
|Firebox Area||93.40 sq. ft||99 sq. ft|
|Grate Area||14.40 sq. ft||20.60 sq. ft|
|Evaporative Heating Surface||1348 sq. ft||1466 sq. ft|
|Combined Heating Surface||1348 sq. ft||1466 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||241.36||262.49|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||2592||3708|
|Same as above plus superheater percentage||2592||3708|
|Same as above but substitute firebox area for grate area||16812||17820|