Midland Uruguay 2-6-0 Locomotives in Uruguay


Class Details by Steve Llanso of Sweat House Media

Class B1 (Locobase 4813)

According to the Circulo de Estudios Ferrovarios del Uruguay (CEFU) website ([link]), this small class of Moguls came to the MUR and its successor the Central Uruguay Railway over more than 2 decades. Three were delivered by Beyer, Peacock, & Co (bldr # 3009-3011) in 1889. After 1899, the MUR formed part of the Central Uruguay Railway (CUR), to which another 2 came from Beyer's in 1905 (4744-4745), 2 more were delivered by Hudswell Clarke in 1906 (778-779), and 1 more came from Beyer in 1910 (5394). Immediately after this last small Mogul, Beyer's began work on a contract for 8 much larger 2-6-0s of the N1 class (see that entry).

Some B1 remained in service into the 1990s, with N17 still being on call for switching duties.


Class unknown (Locobase 20433)

Data from "Powerful New Engines for the Midland Uruguay Railway", Railway Times, Volume LXXXIX [89], No 19 (12 May 1906), p. 605.

This pair of goods Moguls were built to the specification of consulting engineers Messrs. Livesey, Son & Henderson, then employed by the Midland Uruguay Company. The product's profile has some proportion issues. The cab seems too tall for the boiler and squared-off Belpaire firebox, the thimble steam dome too small, the capped stack a bit too far back in the extended smokebox. But most disconcerting of all is the American-designed electric headlight perched on top of the smokebox ahead of the stack and sheathed in a bell-shaped casing taller than the stack itself.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassB1unknown
Locobase ID4813 20433
RailroadMidland UruguayMidland Uruguay
CountryUruguayUruguay
Whyte2-6-0T2-6-0
Number in Class82
Road Numbers
GaugeStdStd
Number Built82
BuilderseveralHudswell, Clarke
Year18891906
Valve GearStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.17 / 3.1011.17 / 3.79
Engine Wheelbase (ft / m)17.33 / 5.2819.08 / 6.12
Ratio of driving wheelbase to overall engine wheelbase 0.59 0.59
Overall Wheelbase (engine & tender) (ft / m) / 13.02
Axle Loading (Maximum Weight per Axle) (lbs / kg)27,440 / 12,447
Weight on Drivers (lbs / kg)75,040 / 34,03881,536 / 36,984
Engine Weight (lbs / kg)86,464 / 39,21991,616 / 47,399
Tender Loaded Weight (lbs / kg)67,445 / 37,289
Total Engine and Tender Weight (lbs / kg)86,464 / 39,219159,061 / 84,688
Tender Water Capacity (gals / ML)2400 / 11.67
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)42 / 2145 / 22.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40 / 101654 / 1372
Boiler Pressure (psi / kPa)140 / 970180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)15.5" x 20" / 394x50817" x 24" / 432x610
Tractive Effort (lbs / kg)14,295 / 6484.1119,652 / 8914.01
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.25 4.15
Heating Ability
Tubes (number - dia) (in / mm)166 - 1.875" / 48206 - 1.875" / 48
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.38 / 3.16
Firebox Area (sq ft / m2)73 / 6.7889 / 8.27
Grate Area (sq ft / m2)13 / 1.2119.50 / 1.81
Evaporative Heating Surface (sq ft / m2)795 / 73.881147 / 106.56
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)795 / 73.881147 / 106.56
Evaporative Heating Surface/Cylinder Volume182.01181.92
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation18203510
Same as above plus superheater percentage18203510
Same as above but substitute firebox area for grate area10,22016,020
Power L124794090
Power MT218.49331.76

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