Porto Alegre a Uruguayana 2-6-0 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 13 (Locobase 11833)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 13, p. 102. Works numbers were 8107, 8109-8110 in August 1886.


Class 18 (Locobase 11832)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 12, p. 120. See also Lionel Wiener, "Locomotives of the Rio Grande do Sul", Locomotive Magazine, Volume 18 (14 September 1912), p. 189. Works numbers were 7478-7480 in October 1884.

These were very similar to the 4-4-0s described in Locobase 11830. Wiener described the flangeless tires on the center drivers as "a useless precaution, as a smaller flange than the others would provide better guidance and cause no trouble on curves."


Class 33 (Locobase 11884)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 17, p. 4. See also Lionel Wiener, "Locomotives of the Rio Grande do Sul", Locomotive Magazine, Volume 18 (15 October 1912), p. 191. Works numbers were 11813-11814, 11819-11822 in April 1891.

This class represents slight changes in the design was supplied to the PA & U in 1884 (see Locobase 11832). One big difference was the 2-ft 4-in increase in the wheelbase. Wiener criticized this length, saying it gave "a long rigid wheelbase, which is not advisable, and a long narrow grate." He also contended that the tenders were too small, a "mistake in a country where rain may be scarce for months on end."

The adhesion and engine weights given in the specifications are Baldwin estimates. Wiener reported that the engine weight was 49,850 lb (22,612 kg), which isn't surprising as Baldwin often low-balled its estimates. Wiener did not give the corresponding weight on the drivers, so Locobase felt constrained to use the pair of estimates.


Class 42 (Locobase 12210)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 20, p. 177. Lionel Wiener, "Locomotives of the Rio Grande do Sul", Volume 18 (15 October 1912), p. 215. Works numbers were 14971-14972 in July 1896.

This pair of Moguls were very similar to the Muzambinho pair delivered to Brazil at almost the same time (Locobase 12201). They burned the Cardiff coal briquettes described in Locobase 11802 at a rate of .085 lb per "virtual ton mile".

As with most other PA & U locomotives, the 42 and 43 would later be renumbered by the Compagnie Auxiliaire as 201-202.

Principal Dimensions by Steve Llanso of Middle Run Media
Class13183342
Locobase ID11833 11832 11884 12210
RailroadPorto Alegre a UruguayanaPorto Alegre a UruguayanaPorto Alegre a UruguayanaPorto Alegre a Uruguayana
CountryBrazilBrazilBrazilBrazil
Whyte2-6-02-6-02-6-02-6-0
Number in Class3362
Road Numbers10, 13, 12, 11/141, 143, 142, 14118-2033-38 / 111-11642-43 / 201-202
GaugeMetreMetreMetreMetre
Number Built3362
BuilderBurnham, Parry, Williams & CoBurnham, Parry, Williams & CoBurnham, Williams & CoBurnham, Williams & Co
Year1886188418911896
Valve GearStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.67 / 2.95 9.67 / 2.9512 / 3.6610 / 3.05
Engine Wheelbase (ft / m)15.67 / 4.7815.67 / 4.7817 / 5.1816.50 / 5.03
Ratio of driving wheelbase to overall engine wheelbase 0.62 0.62 0.71 0.61
Overall Wheelbase (engine & tender) (ft / m)39.50 / 12.0439.50 / 12.0436.83 / 11.2337 / 11.28
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)37,000 / 16,78339,000 / 17,69037,000 / 16,78350,000 / 22,680
Engine Weight (lbs / kg)44,000 / 19,95849,000 / 22,22646,000 / 20,86560,000 / 27,216
Tender Loaded Weight (lbs / kg)36,00036,000 / 16,32928,000 / 12,701
Total Engine and Tender Weight (lbs / kg)80,000 / 19,95885,000 / 38,55574,000 / 33,566
Tender Water Capacity (gals / ML)1800 / 6.821800 / 6.821400 / 5.302000 / 7.58
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)21 / 10.5022 / 1121 / 10.5028 / 14
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41 / 104141 / 104137 / 94042 / 1067
Boiler Pressure (psi / kPa)130 / 900130 / 900130 / 900160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)14" x 18" / 330x45713" x 18" / 330x45713" x 18" / 330x45715" x 18" / 381x457
Tractive Effort (lbs / kg)9508 / 4312.768199 / 3719.019085 / 4120.8913,114 / 5948.42
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.89 4.76 4.07 3.81
Heating Ability
Tubes (number - dia) (in / mm)130 - 1.75" / 44130 - 1.75" / 44156 - 1.5" / 38153 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.58 / 2.62 8.58 / 2.62 8.08 / 2.46 9.04 / 2.76
Firebox Area (sq ft / m2)51.50 / 4.7951.50 / 4.7859 / 5.4875 / 6.97
Grate Area (sq ft / m2)12.80 / 1.1912.80 / 1.1910 / 0.9314.60 / 1.36
Evaporative Heating Surface (sq ft / m2)562 / 52.23562 / 52.21553 / 51.37703 / 65.31
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)562 / 52.23562 / 52.21553 / 51.37703 / 65.31
Evaporative Heating Surface/Cylinder Volume175.24203.24199.98190.95
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1664166413002336
Same as above plus superheater percentage1664166413002336
Same as above but substitute firebox area for grate area66956695767012,000
Power L12270263324583279
Power MT405.77446.52439.37433.74

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