Central Monserrate 0-4-4 "Forney" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Concepcion (Locobase 13316)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31 p.200. See Locobase 13278 for a description of the Monserrate. Works number was 33097 in December 1908.

Although the Monserrate had bought a 2-4-0 for its metre-gauge operation, it apparently needed a smaller tank engine for its lighter-weight 60-cm line. This little backup tank did the job.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID13,316
RailroadCentral Monserrate
Number in Class1
Road Numbers3
Gauge60 cm
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 3.75 / 1.14
Engine Wheelbase (ft / m)13.08 / 3.99
Ratio of driving wheelbase to overall engine wheebase 0.29
Overall Wheelbase (engine & tender) (ft / m)13.08 / 3.99
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)16,000 / 7257
Engine Weight (lbs / kg)26,000 / 11,793
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)26,000
Tender Water Capacity (gals / ML)300 / 1.14
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)13 / 6.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)28 / 711
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)8" x 12" / 203x305
Tractive Effort (lbs / kg)3730 / 1691.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.29
Heating Ability
Firebox Area (sq ft / m2)26.80 / 2.49
Grate Area (sq ft / m2) 6.20 / 0.58
Evaporative Heating Surface (sq ft / m2)174 / 16.16
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)174 / 16.16
Evaporative Heating Surface/Cylinder Volume249.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation992
Same as above plus superheater percentage992
Same as above but substitute firebox area for grate area4288
Power L13294
Power MT907.75

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