Rochester & Pittsburgh Coal & Iron 2-2-4 Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 200 (Locobase 12657)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 25. p. 214. See also "Inspection Car for the Rochester & Pittsburg Coal & Iron Company," Railway and Locomotive Engineering, Volume 17, No 6 (June 1903), p. 259. (Thanks to Chris Hohl for his 19 July 2017 email and pub cite for the R&LE article correcting the wheel arrangement Works number was 21775 in March 1903.

Like most inspection engines, this locomotive had a passenger car body mounted on a conventioal boiler and firebox. Obviously, it had to be well-insulated. The specs noted that the passenger compartment would have six windows while the cab had five. The radial lead truck that used three equalizing springs.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,657
RailroadRochester & Pittsburgh Coal & Iron
Number in Class1
Road Numbers200
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)28.25 / 8.61
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender) (ft / m)28.25 / 8.61
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)23,200 / 10,523
Engine Weight (lbs / kg)72,600 / 32,931
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)72,600
Tender Water Capacity (gals / ML)500 / 1.89
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)9" x 16" / 229x406
Tractive Effort (lbs / kg)3264 / 1480.53
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.11
Heating Ability
Firebox Area (sq ft / m2)51.60 / 4.79
Grate Area (sq ft / m2) 9.61 / 0.89
Evaporative Heating Surface (sq ft / m2)360 / 33.44
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)360 / 33.44
Evaporative Heating Surface/Cylinder Volume305.58
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1538
Same as above plus superheater percentage1538
Same as above but substitute firebox area for grate area8256
Power L17554
Power MT717.83

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