Britton Lumber 2-6-2 "Prairie" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 5 (Locobase 12971)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 29, p. 86. Works number was 28149 in May 1906.

As noted in several other Locobase entries, this exact design was a Baldwin off-the-shelf solution for operations on standard-gauge logging roads throughout the South. In the present engine's instance, it was a Florida company based in Lakewood in northern Florida that needed a small, wood-burning double-ender.

Principal Dimensions by Steve Llanso of Sweat House Media
Class5
Locobase ID12,971
RailroadBritton Lumber
CountryUSA
Whyte2-6-2
Number in Class1
Road Numbers5
GaugeStd
Number Built1
BuilderBurnham, Williams & Co
Year1906
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.17 / 2.80
Engine Wheelbase (ft / m)23.75 / 7.24
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) (ft / m)44.19 / 13.47
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)61,000 / 27,669
Engine Weight (lbs / kg)83,000 / 37,648
Tender Loaded Weight (lbs / kg)60,000 / 27,216
Total Engine and Tender Weight (lbs / kg)143,000 / 64,864
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)34 / 17
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x508
Tractive Effort (lbs / kg)14,967 / 6788.93
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Firebox Area (sq ft / m2)82.20 / 7.64
Grate Area (sq ft / m2)14.13 / 1.31
Evaporative Heating Surface (sq ft / m2)991 / 92.10
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)991 / 92.10
Evaporative Heating Surface/Cylinder Volume242.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2543
Same as above plus superheater percentage2543
Same as above but substitute firebox area for grate area14,796
Power L14730
Power MT512.85