East Oregon Lumber Company 2-8-2 "Mikado" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14323)

Data from DeGolyer, Vol 53, pp. 20+. Works number was 45248 in February 1917.

This wood-burning logging Mikado used a Radley & Hunter spark-arresting stack. Its purview covered the Enterprise, Ore timber harvester's range and included the need to take 100 short tons of trailing load up a 6% maximum grades and negotiate 25 degree curves (radii of 231 feet/70.4 metres) while rolling on standard 56 lb/yard (28 kg/metre) rail.

The 3 was later sold to the Columbia & Colitz as their 102 and went on to serve that line's successor Weyerhaeuser Timber Company.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,323
RailroadEast Oregon Lumber Company
Number in Class1
Road Numbers3
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.08 / 3.68
Engine Wheelbase (ft / m)27.25 / 8.31
Ratio of driving wheelbase to overall engine wheebase 0.44
Overall Wheelbase (engine & tender) (ft / m)49.96 / 15.23
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)111,000 / 50,349
Engine Weight (lbs / kg)139,000 / 63,049
Tender Loaded Weight (lbs / kg)80,000 / 36,287
Total Engine and Tender Weight (lbs / kg)219,000 / 99,336
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)46 / 23
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) 4.11
Heating Ability
Firebox Area (sq ft / m2)140 / 13.01
Grate Area (sq ft / m2)25.50 / 2.37
Evaporative Heating Surface (sq ft / m2)2108 / 195.84
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2108 / 195.84
Evaporative Heating Surface/Cylinder Volume298.22
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4590
Same as above plus superheater percentage4590
Same as above but substitute firebox area for grate area25,200
Power L15244
Power MT416.61

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