Minas & Rio 2-6-0 Locomotives in Brazil

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 13595)

Data from Andrew Coombs' Railways of the Far South [of Argentina] website at [], last accessed 26 December 2011. See also The Railway Times (31 January 1885), p. 158.. (Thanks to Teemu Koivumaki whose 2023 email included a comprehensive spreadsheet of Brazilian steam locomotive builders, works numbers, and owners.) Works numbers were 2242-2243 in 1882.

An 1885 circular published by the developers of this railway offered the following, probably rose-colored, account of the first years of their company:

"So far the traffic has been of a very general character, and is therefore more regular and leas likely to be intermittent than if depending mainly on any particular article of produce. The first train of cattle was run on the 18th of November, and as cattle from Minas must be either driven over the mountains to the market of Rio de Janeiro or travel thither by rail, it is anticipated that the Railway route will eventually be preferred, and that a considerable increase of traffic will be the result. Recent advices from the General Manager indicate increasing development of the resources of the district served by the Company's Railway; new houses are being erected, and clearances of considerable tracts of land for cultivation are being effected, thus giving promise of a steady growth in the Company's traffic."

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID13595
RailroadMinas & Rio
Number in Class2
Road Numbers7-8
Number Built2
BuilderBeyer, Peacock
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.05
Engine Wheelbase (ft / m)16.83 / 5.13
Ratio of driving wheelbase to overall engine wheelbase 0.59
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)43,344 / 19,661
Tender Loaded Weight (lbs / kg)24,192 / 10,973
Total Engine and Tender Weight (lbs / kg)67,536 / 30,634
Tender Water Capacity (gals / ML)2200 / 8.33
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)39 / 991
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)13" x 18" / 330x457
Tractive Effort (lbs / kg)9282 / 4210.25
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)48.52 / 4.51
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)532 / 49.42
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)532 / 49.42
Evaporative Heating Surface/Cylinder Volume192.39
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area6793
Power L12549
Power MT

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