Babcock & Wilcox 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14325)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 53, pp. 60+. Works number was 44488 in November 1916.

Even though the B & W works in Bayonne, NJ, wouldn't have been expected to offer steep grades and sharp curves, the company required that the 3 pull 220 ton short tons up a 4% grade and negotiate curves of 44 1/2 degrees (radii of 135 feet/41.1 metres). Also all windows and doors were to be "made so that they can be entirely removed in the summer. Wire screens to be provided for back windows."

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,325
RailroadBabcock & Wilcox
Number in Class1
Road Numbers3
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.74
Engine Wheelbase (ft / m)24 / 7.32
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender) (ft / m)24 / 7.32
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)117,700 / 53,388
Engine Weight (lbs / kg)147,500 / 66,905
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)147,500
Tender Water Capacity (gals / ML)2500 / 9.47
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)3 / 2.70
Minimum weight of rail (calculated) (lb/yd / kg/m)65 / 32.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)27,039 / 12264.70
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.35
Heating Ability
Firebox Area (sq ft / m2)115 / 10.68
Grate Area (sq ft / m2)22 / 2.04
Evaporative Heating Surface (sq ft / m2)1467 / 136.29
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1467 / 136.29
Evaporative Heating Surface/Cylinder Volume207.54
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3960
Same as above plus superheater percentage3960
Same as above but substitute firebox area for grate area20,700
Power L13813
Power MT214.26

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Wes Barris