Muelle de Eten 4-4-0 Locomotives in Peru

Class Details by Steve Llanso of Sweat House Media

Class Monsefu (Locobase 13752)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 36, p. 220. Works number 35189 in September 1910.

This railroad served the Peruvian Pacific port of Eten and Monsefu was the second stop on the 50-km (31-mile) line after the dockside station and the town of Eten itself.

Monsefu's fuel could be either wood or coal and was delivered with a set of spark-arresting netting for each type of fuel. One of the smallest Eight-wheelers to be built for the standard gauge after the 1850s, the 8 was intended for local passenger traffic and needed to be able to run forward and backward without turning.

Gene Connelly has a note in his comprehensive listing of all Baldwin engines that underscores how long most South American locomotives might be expected to serve. After many years, the 8 was rebuilt in 1956.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID13752
RailroadMuelle de Eten
Number in Class1
Road Numbers8
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.33 / 2.23
Engine Wheelbase (ft / m)20.96 / 6.39
Ratio of driving wheelbase to overall engine wheelbase 0.35
Overall Wheelbase (engine & tender) (ft / m)37.33 / 11.38
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)39,000 / 17,690
Engine Weight (lbs / kg)61,000 / 27,669
Tender Loaded Weight (lbs / kg)36,000 / 16,329
Total Engine and Tender Weight (lbs / kg)97,000 / 43,998
Tender Water Capacity (gals / ML)1800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)3 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)33 / 16.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)14" x 22" / 356x559
Tractive Effort (lbs / kg)9818 / 4453.38
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.97
Heating Ability
Tubes (number - dia) (in / mm)117 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.79 / 3.29
Firebox Area (sq ft / m2)74 / 6.87
Grate Area (sq ft / m2)13.30 / 1.24
Evaporative Heating Surface (sq ft / m2)730 / 67.82
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)730 / 67.82
Evaporative Heating Surface/Cylinder Volume186.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1995
Same as above plus superheater percentage1995
Same as above but substitute firebox area for grate area11,100
Power L13929
Power MT444.20

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