Rochester & Lake Ontario 0-4-2 Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID11,757
RailroadRochester & Lake Ontario
Number in Class2
Road Numbers1-2
Number Built2
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)6
Engine Wheelbase (ft)11.50
Ratio of driving wheelbase to overall engine wheebase 0.52
Overall Wheelbase (engine & tender) (ft)11.50
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)26,000
Engine Weight (lbs)33,000
Tender Light Weight (lbs)
Total Engine and Tender Weight (lbs)33,000
Tender Water Capacity (gals)530
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)22
Geometry Relating to Tractive Effort
Driver Diameter (in)42
Boiler Pressure (psi)130
High Pressure Cylinders (dia x stroke) (in)10" x 16"
Tractive Effort (lbs)4210
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.18
Heating Ability
Firebox Area (sq ft)36
Grate Area (sq ft) 9.80
Evaporative Heating Surface (sq ft)295
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)295
Evaporative Heating Surface/Cylinder Volume202.83
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 L12972
Power MT504.01

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