Proposed Biles-Coleman Lumber Co 2-6-6-2 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 8043 (Locobase 10694)

Data from, last accessed 26 July 2009. See also John E Lewis, Biles-Coleman Lumber Company's Reservation Narrow Gauge (Washington State: privately printed First Edition of 2,500 copies, 1980). (Many thanks to Ken Matzick for his 5 July 2015 email correcting the over-long stroke Locobase had originally entered.)

This locomotive was never actually built. B-C Lumber of Omak, Washington asked for a proposal from Baldwin and this is what the company submitted. It was based on the Ferrocarril do Sur #9 of 1921, described in Locobase 4762. Interestingly, this was not the heaviest 3-footer; several designs were built that were heavier.

Specifications by Steve Llanso of Sweat House Media
Locobase ID10694
RailroadProposed Biles-Coleman Lumber Co
Number in Class0
Road Numbers
Number Built0
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase7'
Engine Wheelbase20.75'
Ratio of driving wheelbase to overall engine wheebase 0.34
Overall Wheelbase (engine & tender)33.67'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers115000 lbs
Engine Weight180000 lbs
Tender Light Weight
Total Engine and Tender Weight180000 lbs
Tender Water Capacity1500 gals
Tender Fuel Capacity (oil/coal)700 gals
Minimum weight of rail (calculated)32 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter38"
Boiler Pressure200 psi
High Pressure Cylinders (dia x stroke)13.5" x 20"
Low Pressure Cylinders (dia x stroke)21" x 20" (2)
Tractive Effort23076 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.98
Heating Ability
Firebox Area70 sq. ft
Grate Area11.70 sq. ft
Evaporative Heating Surface712 sq. ft
Superheating Surface143 sq. ft
Combined Heating Surface855 sq. ft
Evaporative Heating Surface/Cylinder Volume214.89
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2340
Same as above plus superheater percentage2738
Same as above but substitute firebox area for grate area16380
Power L13711
Power MT426.85

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