Moore Timber 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 5 (Locobase 13949)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 43, p. 249 and 45, p. 34.. works numbers were 38627 in November 1912 and 40943 in November 1913.

These were typical wood-burning logging Prairies fitted with 13" diameter Radley & Hunter stacks, whose spark-arresting efficiency was explicitly required to have "special attention." Also indicative of the less-than-mainline operating conditions was the provision that "Plenty of play to be allowed for spring hangers and equalizers, on account of rough track. Equalizing beams to have oil holes for pins at bearings, pins of ample size, case hardened."

Specifications by Steve Llanso of Sweat House Media
Locobase ID13949
RailroadMoore Timber
Number in Class2
Road Numbers5, 3
Number Built2
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase8'
Engine Wheelbase22.75'
Ratio of driving wheelbase to overall engine wheebase 0.35
Overall Wheelbase (engine & tender)43.96'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers56000 lbs
Engine Weight76000 lbs
Tender Light Weight50000 lbs
Total Engine and Tender Weight126000 lbs
Tender Water Capacity2500 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)31 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter42"
Boiler Pressure170 psi
Cylinders (dia x stroke)13" x 22"
Tractive Effort12792 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.38
Heating Ability
Firebox Area74 sq. ft
Grate Area13.30 sq. ft
Evaporative Heating Surface767 sq. ft
Superheating Surface
Combined Heating Surface767 sq. ft
Evaporative Heating Surface/Cylinder Volume226.94
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2261
Same as above plus superheater percentage2261
Same as above but substitute firebox area for grate area12580
Power L14003
Power MT472.77

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