Rochester & Lake Ontario 0-4-2 Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 11757)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 9, p. 147. Works numbers were 4722-4723 in July 1879.

The "Dummy Line" started its street railway operation with these two little tanks in 1879. By 1887, the steam dummies were supplanted in their primary roles by electric trolley cars, but it was six years later that they went to the Rochester & Irondequoit Railway. When that was electrified in 1900, the line was renamed the Rochester & Suburban when the Dummy Line's assets were merged with the existing R&S.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID11757
RailroadRochester & Lake Ontario
Number in Class2
Road Numbers1-2
Number Built2
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)6 / 1.83
Engine Wheelbase (ft / m)11.50 / 3.51
Ratio of driving wheelbase to overall engine wheelbase 0.52
Overall Wheelbase (engine & tender) (ft / m)11.50 / 3.51
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)26,000 / 11,793
Engine Weight (lbs / kg)33,000 / 14,969
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)33,000
Tender Water Capacity (gals / ML)530 / 2.01
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)22 / 11
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 1067
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)10" x 16" / 254x406
Tractive Effort (lbs / kg)4210 / 1909.63
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.18
Heating Ability
Tubes (number - dia) (in / mm)111 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 6.04 / 1.84
Firebox Area (sq ft / m2)36 / 3.35
Grate Area (sq ft / m2) 9.80 / 0.91
Evaporative Heating Surface (sq ft / m2)295 / 27.42
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)295 / 27.42
Evaporative Heating Surface/Cylinder Volume203.45
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1274
Same as above plus superheater percentage1274
Same as above but substitute firebox area for grate area4680
Power L12981
Power MT505.54

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Wes Barris