South Manchester 2-4-4 Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 12403)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 41, p. 179. Works number was 17597 in March 1900.

The SMR covered 2.25 miles from South Manchester to North Manchester. This tank was one of two locomotives operating on the line, which shuttled back and forth between connections to larger railroads.


Class 4 (Locobase 13923)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 41, p. 179. Works number was 36441 in April 1911.

Eleven years after the SMRR took delivery of a 2-4-4T from Baldwin, it went back to Philadelphia for a significantly larger version. Baldwin reused the design from the 1908 Rahway Valley (Locobase 12884), a relatively large example of this wheel arrangement.

Specifications by Steve Llanso of Sweat House Media
Class34
Locobase ID12,403 13,923
RailroadSouth ManchesterSouth Manchester
CountryUSAUSA
Whyte2-4-4T2-4-4T
Number in Class11
Road Numbers34
GaugeStdStd
Number Built11
BuilderBurnham, Williams & CoBaldwin
Year19001911
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)77
Engine Wheelbase (ft)28.5031.33
Ratio of driving wheelbase to overall engine wheebase 0.25 0.22
Overall Wheelbase (engine & tender) (ft)28.5031.33
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)54,00074,700
Engine Weight (lbs)95,000150,300
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)95,000150,300
Tender Water Capacity (gals)12002500
Tender Fuel Capacity (oil/coal) (gals/tons)3
Minimum weight of rail (calculated) (lb/yd)4562
Geometry Relating to Tractive Effort
Driver Diameter (in)5156
Boiler Pressure (psi)160160
High Pressure Cylinders (dia x stroke) (in)15" x 22"17" x 24"
Tractive Effort (lbs)13,20016,845
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.09 4.43
Heating Ability
Firebox Area (sq ft)87.70152
Grate Area (sq ft)1418.20
Evaporative Heating Surface (sq ft)10051495
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)10051495
Evaporative Heating Surface/Cylinder Volume223.35237.11
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation22402912
Same as above plus superheater percentage22402912
Same as above but substitute firebox area for grate area14,03224,320
Power L143635341
Power MT356.25315.26


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