Jones & McLaughlin Steel 0-4-0 "Switcher" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 10806)

Data from "Pittsburgh Four-Wheel Saddle Tank Engine", Railway & Locomotive Engineering, Vol XIII, No. 1 (January 1900), p. 8. Probably works number 1700 in March 1897, 1701 in April, and 1777-1778 in January 1898.

The saddle-tank on this diminuitive industrial switcher had a flat top that was exactly even with the top of the cab and the stack. Rumary's list of Pittsburgh locomotives identifies these as 0-4-0s (implying a tender), but the number on the cab in the R & LE illustration is 4, suggesting that it was this saddle-tank design that was delivered.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID10,806
RailroadJones & McLaughlin Steel
Number in Class4
Road Numbers3-6
Number Built4
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)4 / 1.22
Engine Wheelbase (ft / m)4 / 1.22
Ratio of driving wheelbase to overall engine wheebase1
Overall Wheelbase (engine & tender) (ft / m)4 / 1.22
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)31,000 / 14,061
Engine Weight (lbs / kg)31,000 / 14,061
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)31,000
Tender Water Capacity (gals / ML)450 / 1.70
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)26 / 13
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)28 / 711
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)11" x 14" / 279x356
Tractive Effort (lbs / kg)9257 / 4198.91
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.35
Heating Ability
Firebox Area (sq ft / m2)33 / 3.07
Grate Area (sq ft / m2) 6.46 / 0.60
Evaporative Heating Surface (sq ft / m2)301 / 27.97
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)301 / 27.97
Evaporative Heating Surface/Cylinder Volume195.47
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1163
Same as above plus superheater percentage1163
Same as above but substitute firebox area for grate area5940
Power L12542
Power MT361.56

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