Central Monserrate 0-4-4 "Forney" Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13316
RailroadCentral Monserrate
Number in Class1
Road Numbers3
Gauge60 cm
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 3.75'
Engine Wheelbase13.08'
Ratio of driving wheelbase to overall engine wheebase 0.29
Overall Wheelbase (engine & tender)13.08'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers16000 lbs
Engine Weight26000 lbs
Tender Light Weight
Total Engine and Tender Weight26000 lbs
Tender Water Capacity300 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)13 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter28"
Boiler Pressure160 psi
Cylinders (dia x stroke)8" x 12"
Tractive Effort3730 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.29
Heating Ability
Firebox Area26.80 sq. ft
Grate Area 6.20 sq. ft
Evaporative Heating Surface174 sq. ft
Superheating Surface
Combined Heating Surface174 sq. ft
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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