Waterman Lumber Co. 2-6-2 "Prairie" Type Locomotives

Class 3 (Locobase 5089)

Marshall, Texas lumber company bought these smallish standard-gauge Prairies. The profile looks turn-of-the-century, but in fact the first was delivered June 1909 (works #33510) , followed a little more than 3 years later (July 1912 - works #38033) by Waterman #3. A full decade later, a third little Prairie came on the property (works #55375, produced October 1922) of the by-now Waterman Fouke-Lumber Co

Tonnage ratings were as follows:

Short tons grade

1,550 level

720 1/2%

435 1%

220 2%

135 3%

85 4%

55 5%

35 6%

(Somehow, the image of this Prairie struggling up a 6% with 1 or 2 cars in the knuckle strikes Locobase as implausible.)

Specifications
Class3
Locobase ID5089
RailroadWaterman Lumber Co.
Whyte2-6-2
Road Numbers
GaugeStd
BuilderBaldwin
Year1909
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase 9.17'
Engine Wheelbase23.75'
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender)46.71'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers61000 lbs
Engine Weight83500 lbs
Tender Light Weight68500 lbs
Total Engine and Tender Weight152000 lbs
Tender Water Capacity3000 gals
Tender Fuel Capacity (oil/coal)4 tons
Minimum weight per yard of rail on which locomotive could run33.89 lb rail
Geometry Relating to Tractive Effort
Driver Diameter46"
Boiler Pressure180 psi
Cylinders (dia x stroke)15" x 20"
Tractive Effort14967 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Firebox Area82 sq. ft
Grate Area14 sq. ft
Evaporative Heating Surface991
Superheating Surface
Combined Heating Surface991
Evaporative Heating Surface/Cylinder Volume242.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2520
Same as above plus superheater percentage2520
Same as above but substitute firebox area for grate area14760
Power L14726.38
Power MT512.45

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.