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 ID11757
RailroadRochester & Lake Ontario
Number in Class2
Road Numbers1-2
Number Built2
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase6'
Engine Wheelbase11.50'
Ratio of driving wheelbase to overall engine wheebase 0.52
Overall Wheelbase (engine & tender)11.50'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers26000 lbs
Engine Weight33000 lbs
Tender Light Weight
Total Engine and Tender Weight33000 lbs
Tender Water Capacity530 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)22 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter42"
Boiler Pressure130 psi
Cylinders (dia x stroke)10" x 16"
Tractive Effort4210 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.18
Heating Ability
Firebox Area36 sq. ft
Grate Area 9.80 sq. ft
Evaporative Heating Surface295 sq. ft
Superheating Surface
Combined Heating Surface295 sq. ft
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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