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.


Class 57 (Locobase 16679)

Data from Josh Edwards's 30 December 2024 email and Gene Connelly's Porter production list. Additional information from flickr reproduction of 58's Locomotive Encyclopedia record at[link], last accessed 6 February 2025.Works numbers were 7244-7245 in July 1937. Works numbers 7613-7614 (J&L 60-61) in March 1944 and 8147-8148 (J&L 62-63) in October 1947 appear to have been built to the same design..

Narrow-gauge on the J&L steel works's property meant both rail width and loading (or clearance) gauge. Photos of the pair show the rectangular cube created when, like the Pittsburgh engines described in Locobase 10806, the saddle-tank's flat top on these diminuitive industrial switchers that lay exactly even with the top of the cab and the stack. The dimensions doubtless marked the smallest possible "hole" through which these engines could squeeze.

Steam entered the cylinders through piston valves.

J&L sold off the entire sextet to Crown Metal Products in 1969.

Principal Dimensions by Steve Llanso of Middle Run Media
Class357
Locobase ID10806 16679
RailroadJones & McLaughlin SteelJones & McLaughlin Steel
CountryUSAUSA
Whyte0-4-0ST0-4-0ST
Number in Class42
Road Numbers3-657-58
Gauge23"23"
Number Built42
BuilderPittsburghPorter
Year18971937
Valve GearStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)4 / 1.225 / 1.52
Engine Wheelbase (ft / m)4 / 1.225 / 1.52
Ratio of driving wheelbase to overall engine wheelbase11
Overall Wheelbase (engine & tender) (ft / m)4 / 1.225 / 1.52
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)31,000 / 14,06193,000 / 42,184
Engine Weight (lbs / kg)31,000 / 14,06193,000 / 42,184
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)450 / 1.70450 / 1.70
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)26 / 1378 / 39
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)28 / 71132 / 813
Boiler Pressure (psi / kPa)180 / 1240200 / 1380
High Pressure Cylinders (dia x stroke) (in / mm)11" x 14" / 279x35615" x 16" / 381x406
Tractive Effort (lbs / kg)9257 / 4198.9119,125 / 8674.96
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.35 4.86
Heating Ability
Tubes (number - dia) (in / mm)74 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)7 / 2.13
Firebox Area (sq ft / m2)33 / 3.07
Grate Area (sq ft / m2) 6.46 / 0.60 9.07 / 0.84
Evaporative Heating Surface (sq ft / m2)301 / 27.97443 / 41.16
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)301 / 27.97443 / 41.16
Evaporative Heating Surface/Cylinder Volume195.45135.47
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11631814
Same as above plus superheater percentage11631814
Same as above but substitute firebox area for grate area5940
Power L12542
Power MT361.56

Photos

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