Pennsylvania 0-8-0 "Switcher" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 44 (Locobase 15778)

Data from David Kinnear Clark and Zerah Colburn, Recent Practice in the Locomotive Engine (Glasgow: Blackie & Son, 1859), p. 82. Works numbers were 787-789 in October 1857 and 793-794 in November.

Flexible-beam eight-coupled engines from Baldwin enjoyed some success beginning in the mid-1840s (see Locobase 1022 for a description of this setup). Colburn pointed out two advantages to the layout. The "hind truck" was under the firebox and, "while the wheelbase is thus limited, an equal distribution of weight is obtained." Total heating surface area probably came to about 775 sq ft (72 sq m).

The second of the five was sent to the North Pennsylvania with the name Carbon. It was scrapped in 1873. The 44 was scrapped in January 1876. Both of the later engines gained some tractive effort when they rebuilt in the mid-1860s with cylinders of a longer stroke of 22" (559 mm) and 48" (1,219 mm) drivers. Both were sold in 1870 and 1869, respectively, to the Huntingdon & Broad Top Mountain.

Class Quaker City (Locobase 2606)


[] (visited 6 Jan 2005), which is a reprint of a collection of articles by Paul Warner originally published in Baldwin Magazine in 1924. Works numbers were 573-576. Boiler pressure is an estimate.

This class was made up of Baldwin's flexible-beam truck locomotives Quaker City (94), Iron City (95), Pennsylvania (97), and Bedford (98). Ex-Quaker City was rebuilt as a 2-6-0 in November 1865 and scrapped in August 1879. 97-98 were both rebuilt as 2-8-0T tank engine in 1864 and scrapped in 1869.

Principal Dimensions by Steve Llanso of Sweat House Media
Class44Quaker City
Locobase ID15,778 2606
RailroadPennsylvania (PRR)Pennsylvania (PRR)
Number in Class54
Road Numbers44, 16, 45, 128-12994-95, 97-98
Number Built54
BuilderM W Baldwin & CoM W Baldwin & Co
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)66,000 / 29,937
Engine Weight (lbs / kg)66,000 / 29,937
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)28 / 14
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43 / 109243 / 1092
Boiler Pressure (psi / kPa)90 / 6.2090 / 6.20
High Pressure Cylinders (dia x stroke) (in / mm)18" x 20" / 457x50819" x 22" / 483x559
Tractive Effort (lbs / kg)11,528 / 5229.0214,129 / 6408.81
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.67
Heating Ability
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)18.66 / 1.73
Evaporative Heating Surface (sq ft / m2)
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1679
Same as above plus superheater percentage1679
Same as above but substitute firebox area for grate area
Power L1
Power MT

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Wes Barris