Murphy Lumber Company 0-6-4 Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Dirigo (Locobase 10699)

Data from George L Fowler, Locomotive Dictionary (1st Ed.), (New York: Railroad Gazette, 1906), p. 9, Figure 18. Date is an estimate.

Locobase has only the data supplied in the Fowler plate in the 1906 edition. He has not been able to identify this locomotive further and one doubts the builder's identity as well.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10699
RailroadMurphy Lumber Company
Number in Class1
Road Numbers1
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)56,200 / 25,492
Engine Weight (lbs / kg)69,400 / 31,479
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)69,400
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)31 / 15.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)38 / 965
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)13" x 18" / 330x457
Tractive Effort (lbs / kg)10,207 / 4629.82
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.51
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)40 / 3.72
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)723 / 67.19
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)723 / 67.19
Evaporative Heating Surface/Cylinder Volume261.01
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area6000
Power L13166
Power MT372.59

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