Boston & Providence 0-6-0 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Highlander (Locobase 9536)

Data from table entitled "Motive Power Boston & Providence Railroad Company," Railway and Locomotive Engineering, October 1899, page 443, which was prepared by George S Griggs, then (November 1856) Superintendent of Motive Power at the B & P's Roxbury, Mass Machine Shop. See also Data from table entitled "Table of Dimensions of the Locomotives" in New England Association of Railway Superintendents, Report of the Trials of Locomotive Engines Made Upon 1st and 2nd October, 1851 (Boston: B J Yerrinton, Printers, 1852), p. 16.

This may have been a switcher as it one of a few using the all-coupled wheel arrangement then popular in Europe for freight engines. Its smaller boiler and grate suggest a short-range aspiration. It was delivered in June 1850.

In the October 1851 trials, the two all-adhesion freight engines (the other being Milo, Locobase 13552) ran a different route that measured only 1.7 miles in length. They each hauled a 650-ton train consisting of 114 loaded cars.

Specifications by Steve Llanso of Sweat House Media
Locobase ID9536
RailroadBoston & Providence
Number in Class1
Road Numbers
Number Built1
BuilderB&P Roxbury
Valve Geardrop-hook
Locomotive Length and Weight
Driver Wheelbase
Engine Wheelbase
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers41200 lbs
Engine Weight41200 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity1430 gals
Tender Fuel Capacity (oil/coal)1.5 tons
Minimum weight of rail (calculated)23 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter48"
Boiler Pressure120 psi
Cylinders (dia x stroke)14.75" x 18"
Tractive Effort8322 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.95
Heating Ability
Firebox Area51.80 sq. ft
Grate Area 8.90 sq. ft
Evaporative Heating Surface659 sq. ft
Superheating Surface
Combined Heating Surface659 sq. ft
Evaporative Heating Surface/Cylinder Volume185.12
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1068
Same as above plus superheater percentage1068
Same as above but substitute firebox area for grate area6216
Power L12476
Power MT397.47

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