Llano del Maipo 2-6-0 Locomotives in Chile


Class Details by Steve Llanso of Sweat House Media

Class Llano del Maipo (Locobase 13872)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 17, p. 189. See also the amigos del tren article at [link] and an essay [link], last accessed 16 February 2012. Works numbers were 12414 in January 1892. 18511 in December 1900, 23948 in March 1904, and 36431 in April 1911.

As originally conceived in 1888, this railway would link a section of downtown Santiago with the soon-famous Concha y Toro vineyards in Pirque; it opened in 1893. One of the early locomotives on the line was this unassuming Mogul named for the railway.

Two years after this wine railway began service, its new owners adopted much more ambitious plans. See Locobase 13873.


Class Melchor Concha y Toro (Locobase 13873)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 26, p. 295 and Volume 39, p 291. See also the amigos del tren article at [link] and an essay [link], last accessed 16 February 2012. Works numbers were 18511 in December 1900, 23948 in March 1904, and 36431 in April 1911.

The original intent of this railway's construction is briefly described in Locobase 13872. When Francisco Subercaseaux and his sister and widow of Don Melchor Concha y Toro, Emiliana Subercaseaux de Concha, bought the road in 1895, their dream was to connect Santiago with Argentina using a route along the Rio Maipo.

Instead, the line extended only to Puente Alto, about 22 km from the Estacion de Pirque in Santiago, a building famed for its size and luxurious appointments as befitting the destination of those Argentine passengers that would never arrive.

The Moguls shown here joined the 2 (which had a lower boiler pressure, but was otherwise similar) in supporting Ll del M during its steam-driven years. The first was named for the vineyard's founder; it was delivered with a boiler pressure set to 180 psi. The specs were undemanding: a maximum grade of 1 1/4%, curves with radii as tight as 150 metres (492 ft), and a speed of 20 km/h (13 mph).

The second was named for Francisco's father and the third for his niece (or grandniece) Magdalena Vicu'a.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassLlano del MaipoMelchor Concha y Toro
Locobase ID13872 13873
RailroadLlano del MaipoLlano del Maipo
CountryChileChile
Whyte2-6-02-6-0
Number in Class13
Road Numbers23-5
GaugeMetreMetre
Number Built13
BuilderBurnham, Williams & CoBurnham, Williams & Co
Year18921900
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.67 / 2.64 8.67 / 2.64
Engine Wheelbase (ft / m)14.67 / 4.4714.67 / 4.47
Ratio of driving wheelbase to overall engine wheelbase 0.59 0.59
Overall Wheelbase (engine & tender) (ft / m)34 / 10.3634 / 10.36
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)33,000 / 14,96933,000 / 14,969
Engine Weight (lbs / kg)40,000 / 18,14440,000 / 18,144
Tender Loaded Weight (lbs / kg)37,000 / 16,78337,000 / 16,783
Total Engine and Tender Weight (lbs / kg)77,000 / 34,92777,000 / 34,927
Tender Water Capacity (gals / ML)1200 / 4.551200 / 4.55
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)18 / 918 / 9
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)39 / 99139 / 991
Boiler Pressure (psi / kPa)130 / 1100160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)12" x 18" / 305x45712" x 18" / 305x457
Tractive Effort (lbs / kg)7344 / 3331.199039 / 4100.03
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.49 3.65
Heating Ability
Tubes (number - dia) (in / mm)123 - 1.5" / 38123 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.08 / 2.46 8.08 / 2.46
Firebox Area (sq ft / m2)45.50 / 4.2345.50 / 4.23
Grate Area (sq ft / m2)11.40 / 1.0611.40 / 1.06
Evaporative Heating Surface (sq ft / m2)432 / 40.13432 / 40.13
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)432 / 40.13432 / 40.13
Evaporative Heating Surface/Cylinder Volume183.35183.35
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation14821824
Same as above plus superheater percentage14821824
Same as above but substitute firebox area for grate area59157280
Power L123652911
Power MT473.99583.42

All material Copyright © SteamLocomotive.com
Wes Barris