Hobi Timber Company 2-8-2 "Mikado" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14815)

Data from DeGolyer, Vol 80, pp. 163+. Works number was 58678 in September 1925.

Piston valves measured 10" (254 mm) in diameter. The maximum grade against a loaded train was 1 1/2%; empty trains faced a 5% grade.

Specifications by Steve Llanso of Sweat House Media
Class3
Locobase ID14,815
RailroadHobi Timber Company
CountryUSA
Whyte2-8-2
Number in Class1
Road Numbers3
GaugeStd
Number Built1
BuilderBaldwin
Year1925
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.08 / 3.68
Engine Wheelbase (ft / m)28.50 / 8.69
Ratio of driving wheelbase to overall engine wheebase 0.42
Overall Wheelbase (engine & tender) (ft / m)50.35 / 15.35
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)125,000 / 56,699
Engine Weight (lbs / kg)155,000 / 70,307
Tender Loaded Weight (lbs / kg)86,600 / 39,281
Total Engine and Tender Weight (lbs / kg)241,600 / 109,588
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)1500 / 5.70
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 26
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)19" x 24" / 483x610
Tractive Effort (lbs / kg)31,801 / 14424.71
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.93
Heating Ability
Firebox Area (sq ft / m2)158 / 14.68
Grate Area (sq ft / m2)29 / 2.69
Evaporative Heating Surface (sq ft / m2)1700 / 157.93
Superheating Surface (sq ft / m2)356 / 33.07
Combined Heating Surface (sq ft / m2)2056 / 191
Evaporative Heating Surface/Cylinder Volume215.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5510
Same as above plus superheater percentage6447
Same as above but substitute firebox area for grate area35,123
Power L110,073
Power MT710.63